示例#1
0
    def __init__(self, *args, **kwargs):
        if 'queryset' in kwargs:
            self.queryset = kwargs['queryset']
        else:
            self.queryset = None

        ForeignKey.__init__(self, *args, **kwargs)
示例#2
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class MessageOptions(GmailOptions):
    app_label = 'mailchecker'
    model_name = 'message'
    verbose_name = 'message'
    verbose_name_raw = 'message'
    verbose_name_plural = 'messages'
    object_name = 'message'
    default_related_name = None

    _gmail_pk_field = 'id'
    _gmail_fields = {
        'id': GmailAutoField(),
        'receiver': CharField(max_length=200),
        'sender': CharField(max_length=200),
        'snippet': CharField(max_length=200),
        'body': TextField(),
    }

    def _bind(self):
        super(MessageOptions, self)._bind()

        from .models import Thread, Message
        self.thread = ForeignKey(Thread)
        self.thread.contribute_to_class(Thread, 'thread')
        self.concrete_model = Message
        self._gmail_other_fields['thread'] = self.thread
示例#3
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 def contribute_to_class(self, cls, name):
     self.name = name
     self.fk_field_name = name + '_fk'
     self.ft_field_name = name + '_ft'
     setattr(cls, name, self)
     fk_field = ForeignKey(self.foreign_model, blank=True, null=True)
     fk_field.contribute_to_class(cls, self.fk_field_name)
     ft_field = CharField(max_length=255, blank=True)
     ft_field.contribute_to_class(cls, self.ft_field_name)
示例#4
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 def contribute_to_class(self, cls, name):
     self.name = name
     self.fk_field_name = name + '_fk'
     self.ft_field_name = name + '_ft'
     setattr(cls, name, self)
     fk_kwargs = dict(blank=True, null=True)
     if self.related_name:
         fk_kwargs['related_name'] = self.related_name
     fk_field = ForeignKey(self.foreign_model, **fk_kwargs)
     fk_field.contribute_to_class(cls, self.fk_field_name)
     ft_field = CharField(max_length=255, blank=True, null=True, default='')
     ft_field.contribute_to_class(cls, self.ft_field_name)
示例#5
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    def __init__(self, field_name):
        # Compute new attributes
        attributes = {'__module__': __name__,
                      'key': CharField(max_length=255),
                      'value': PositiveIntegerField(default=0)}

        self.dbclass = type.__new__(type,
                                    "Stats%s" % (field_name),
                                    (Model,),
                                    attributes,
                                    )

        ForeignKey.__init__(self, self.dbclass)
示例#6
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    def _bind(self):
        super()._bind()

        from .models import Image, Instance
        self.thread = ForeignKey(Image)
        self.thread.contribute_to_class(Image, 'ami')
        self.concrete_model = Instance
        self._aws_other_fields['thread'] = self.thread
示例#7
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    def _bind(self):
        super(MessageOptions, self)._bind()

        from .models import Thread, Message
        self.thread = ForeignKey(Thread)
        self.thread.contribute_to_class(Thread, 'thread')
        self.concrete_model = Message
        self._gmail_other_fields['thread'] = self.thread
示例#8
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class PersonTopic(Orderable):
    person = ParentalKey("Person", related_name="topics")
    topic = ForeignKey("topics.Topic", on_delete=CASCADE, related_name="+")

    panels = [PageChooserPanel("topic")]
示例#9
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class Category(Model):
    """
    カテゴリのモデルです

    Fields
    ------
    name : CharField
        カテゴリ名
    isIncome : BooleanField
        収入なら True
        支出なら False
    writer : User
        カテゴリの作成者

    Properties (Read Only)
    ----------------------
    categoryName : CharField
        nameと同じ
    """

    # Fields

    name = CharField(max_length=128)
    isIncome = BooleanField()
    # もとのユーザ削除時 -> このカテゴリも一緒に削除される (CASCADE)
    writer = ForeignKey(User, on_delete=CASCADE)

    class Meta:
        # 同一ユーザーが同じ名前のカテゴリを重複して持てないようにする
        unique_together = ('name', 'writer', 'isIncome')

    # properties
    @property
    def categoryName(self):
        return self.name

    # public methods

    def __str__(self):
        return self.name

    def setName(self, name: str) -> Optional[Model]:
        """
        カテゴリ名をセットし、カテゴリ自身を返します。
        nameが空欄のときは、セットせず、Noneを返します。

        Parameters
        ----------
        name : str
            新しいカテゴリ名

        Returns
        -------
        category : Category or None
            セット成功時、このカテゴリオブジェクト
            セット失敗時、None
        """
        category = self if name else None

        if category:
            category.name = name

        return category
示例#10
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class ScriptSet(CleanSave, Model):
    class Meta(DefaultMeta):
        """Needed for South to recognize this model."""

    objects = ScriptSetManager()

    last_ping = DateTimeField(blank=True, null=True)

    node = ForeignKey('maasserver.Node', on_delete=CASCADE)

    result_type = IntegerField(choices=RESULT_TYPE_CHOICES,
                               editable=False,
                               default=RESULT_TYPE.COMMISSIONING)

    power_state_before_transition = CharField(max_length=10,
                                              null=False,
                                              blank=False,
                                              choices=POWER_STATE_CHOICES,
                                              default=POWER_STATE.UNKNOWN,
                                              editable=False)

    def __str__(self):
        return "%s/%s" % (self.node.system_id, self.result_type_name)

    def __iter__(self):
        for script_result in self.scriptresult_set.all():
            yield script_result

    @property
    def result_type_name(self):
        return RESULT_TYPE_CHOICES[self.result_type][1]

    @property
    def status(self):
        qs = self.scriptresult_set.all()
        # The status order below represents the order of precedence.
        for status in (SCRIPT_STATUS.RUNNING, SCRIPT_STATUS.INSTALLING,
                       SCRIPT_STATUS.PENDING, SCRIPT_STATUS.ABORTED,
                       SCRIPT_STATUS.FAILED, SCRIPT_STATUS.FAILED_INSTALLING,
                       SCRIPT_STATUS.TIMEDOUT, SCRIPT_STATUS.DEGRADED):
            for script_result in qs:
                if script_result.status == status:
                    if status == SCRIPT_STATUS.INSTALLING:
                        # When a script is installing the script set is
                        # running.
                        return SCRIPT_STATUS.RUNNING
                    elif status == SCRIPT_STATUS.TIMEDOUT:
                        # A timeout causes the node to go into a failed status
                        # so show the ScriptSet as failed.
                        return SCRIPT_STATUS.FAILED
                    elif status == SCRIPT_STATUS.FAILED_INSTALLING:
                        # Installation failure causes the node to go into a
                        # failed status so show the ScriptSet as failed.
                        return SCRIPT_STATUS.FAILED
                    else:
                        return status
        return SCRIPT_STATUS.PASSED

    @property
    def status_name(self):
        return SCRIPT_STATUS_CHOICES[self.status][1]

    @property
    def started(self):
        qs = self.scriptresult_set.all()
        if qs.exists():
            return qs.earliest('started').started
        else:
            return None

    @property
    def ended(self):
        qs = self.scriptresult_set.all()
        if not qs.exists():
            return None
        elif qs.filter(ended=None).exists():
            return None
        else:
            return qs.latest('ended').ended

    @property
    def runtime(self):
        if None not in (self.ended, self.started):
            runtime = self.ended - self.started
            return str(runtime - timedelta(microseconds=runtime.microseconds))
        else:
            return ''

    def find_script_result(self, script_result_id=None, script_name=None):
        """Find a script result in the current set."""
        if script_result_id is not None:
            try:
                return self.scriptresult_set.get(id=script_result_id)
            except ObjectDoesNotExist:
                pass
        else:
            for script_result in self:
                if script_result.name == script_name:
                    return script_result
        return None

    def regenerate(self):
        """Regenerate any ScriptResult which has a storage parameter.

        Deletes and recreates ScriptResults for any ScriptResult which has a
        storage parameter. Used after commissioning has completed when there
        are tests to be run.
        """
        # Avoid circular dependencies.
        from metadataserver.models import ScriptResult

        regenerate_scripts = {}
        for script_result in self.scriptresult_set.filter(
                status=SCRIPT_STATUS.PENDING).exclude(parameters={}):
            # If there are multiple storage devices on the system for every
            # script which contains a storage type parameter there will be
            # one ScriptResult per device. If we already know a script must
            # be regenearted it can be deleted as the device the ScriptResult
            # is for may no longer exist. Regeneratation below will generate
            # ScriptResults for each existing storage device.
            if script_result.script in regenerate_scripts:
                script_result.delete()
                continue
            # Check if the ScriptResult contains any storage type parameter. If
            # so remove the value of the storage parameter only and add it to
            # the list of Scripts which must be regenearted.
            for param_name, param in script_result.parameters.items():
                if param['type'] == 'storage':
                    # Remove the storage parameter as the storage device may no
                    # longer exist. The ParametersForm will set the default
                    # value(all).
                    script_result.parameters.pop(param_name)
                    regenerate_scripts[
                        script_result.script] = script_result.parameters
                    script_result.delete()
                    break

        for script, params in regenerate_scripts.items():
            form = ParametersForm(data=params, script=script, node=self.node)
            if not form.is_valid():
                err_msg = (
                    "Removing Script %s from ScriptSet due to regeneration "
                    "error - %s" % (script.name, dict(form.errors)))
                logger.error(err_msg)
                Event.objects.create_node_event(
                    system_id=self.node.system_id,
                    event_type=EVENT_TYPES.SCRIPT_RESULT_ERROR,
                    event_description=err_msg)
                continue
            for i in form.cleaned_data['input']:
                ScriptResult.objects.create(script_set=self,
                                            status=SCRIPT_STATUS.PENDING,
                                            script=script,
                                            script_name=script.name,
                                            parameters=i)

    def delete(self, force=False, *args, **kwargs):
        if not force and self in {
                self.node.current_commissioning_script_set,
                self.node.current_installation_script_set
        }:
            # Don't allow deleting current_commissioing_script_set as it is
            # the data set MAAS used to gather hardware information about the
            # node. The current_installation_script_set is only set when a node
            # is deployed. Don't allow it to be deleted as it contains info
            # about the OS deployed.
            raise ValidationError(
                'Unable to delete the current %s script set for node: %s' %
                (self.result_type_name.lower(), self.node.fqdn))
        elif self == self.node.current_testing_script_set:
            # MAAS uses the current_testing_script_set to know what testing
            # script set should be shown by default in the UI. If an older
            # version exists set the current_testing_script_set to it.
            try:
                previous_script_set = self.node.scriptset_set.filter(
                    result_type=RESULT_TYPE.TESTING)
                previous_script_set = previous_script_set.exclude(id=self.id)
                previous_script_set = previous_script_set.latest('id')
            except ScriptSet.DoesNotExist:
                pass
            else:
                self.node.current_testing_script_set = previous_script_set
                self.node.save(update_fields=['current_testing_script_set'])
        return super().delete(*args, **kwargs)
示例#11
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class EventPhoto(Photo):
    event = ForeignKey(Event, related_name='photos')
示例#12
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class TopicRef(Model):
    topic = ForeignKey(Topic, on_delete=CASCADE, related_name='references')
    qId = CharField(max_length=20)
示例#13
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class BulkManagerTestModel(Model):
    parent = ForeignKey("BulkManagerParentTestModel",
                        editable=False,
                        on_delete=CASCADE)

    objects = BulkManager()
 def __init__(self, **kwargs):
     kwargs.setdefault('to', settings.AUTH_USER_MODEL)
     kwargs.setdefault('null', True)
     kwargs.setdefault('blank', True)
     ForeignKey.__init__(self, **kwargs)
示例#15
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class MessageHistory(Model):
    time = BigIntegerField(default=get_milliseconds)
    message = ForeignKey('Message', CASCADE, null=False)
    content = TextField(null=True, blank=True)
    giphy = URLField(null=True, blank=True)
示例#16
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文件: template.py 项目: zhangrb/maas
class Template(CleanSave, TimestampedModel):
    """A generic `Template` object, with a link to a default version and an
    optional custom version.

    :ivar filename: The filename of this template (/etc/mass/templates/X)
    :ivar default_version: The default value for this template. Useful if the
        template needs to be reset after an accidental edit. MAAS is
        responsible for the default_version; the user is not allowed to set it.
    :ivar version: The current in-use version of this template. If this exists,
        the specified template will be used (rather than the default). If
        not specified, the default_version will be used.
    """

    class Meta(DefaultMeta):
        """Needed for South to recognize this model."""
        verbose_name = "Template"
        verbose_name_plural = "Templates"

    objects = TemplateManager()

    filename = CharField(
        editable=True, max_length=64, blank=False, null=False, unique=True,
        help_text="Template filename")

    default_version = ForeignKey(
        "VersionedTextFile", on_delete=CASCADE, editable=False, blank=False,
        null=False, related_name="default_templates",
        help_text="Default data for this template.")

    version = ForeignKey(
        "VersionedTextFile", on_delete=CASCADE, editable=True, blank=True,
        null=True, related_name="templates",
        help_text="Custom data for this template.")

    @property
    def value(self):
        if self.version is not None:
            return self.version.data
        else:
            return self.default_version.data

    @property
    def default_value(self):
        return self.default_version.data

    @property
    def is_default(self):
        return self.version is None

    def revert(self, verbosity=0, stdout=sys.stdout):
        self.version = None
        self.save()
        if verbosity > 0:
            stdout.write("Reverted template to default: %s\n" % self.filename)

    def update(self, new_text, comment=None):
        if self.version is None:
            version = self.default_version
        else:
            version = self.version
        self.version = version.update(new_text, comment)

    def delete(self, *args, **kwargs):
        if self.default_version is not None:
            # By deleting the oldest version, the deletion should cascade
            # to all other versions of the file.
            self.default_version.get_oldest_version().delete(*args, **kwargs)
        return super().delete(*args, **kwargs)
示例#17
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class Profile(models.Model):
    def __unicode__(self):
        return unicode(self.user)

    def get_absolute_url(self):
        return reverse('competition_detail', kwargs={'pk': str(self.pk)})

    user = models.OneToOneField(User)
    feature_level = IntegerField(choices=FEATURE_LEVELS, default=1)
    managed_profiles = models.ManyToManyField('Profile',
                                              related_name='managers',
                                              null=True,
                                              blank=True)
    # managed_users = models.ManyToManyField(User, related_name='managers', null=True, blank=True)
    #first_competition = models.ForeignKey(Competition, null=True, blank=True)
    #registration_code = CodeField(null=True, blank=True)
    created_codes = ManyToManyField(Code,
                                    null=True,
                                    blank=True,
                                    related_name='creator_set')
    received_codes = ManyToManyField(Code,
                                     null=True,
                                     blank=True,
                                     related_name='recipient_set')
    used_codes = ManyToManyField(Code,
                                 null=True,
                                 blank=True,
                                 related_name='user_set')
    question_sets = ManyToManyField(QuestionSet, null=True, blank=True)
    questions = ManyToManyField(Question, null=True, blank=True)
    merged_with = ForeignKey('Profile',
                             null=True,
                             blank=True,
                             related_name='former_profile_set')
    # merged_with = ForeignKey(User, null = True, blank=True, related_name='merged_set')
    update_used_codes_timestamp = DateTimeField(null=True, blank=True)
    update_managers_timestamp = DateTimeField(null=True, blank=True)
    vcard = models.TextField(blank=True)

    @property
    def first_name(self):
        return self.user.first_name

    @property
    def last_name(self):
        return self.user.last_name

    @property
    def email(self):
        return self.user.email

    @property
    def username(self):
        return self.user.username

    def __superiors(self, codegen, known):
        for c in self.received_codes.filter(format=codegen.format,
                                            salt=codegen.salt):
            for o in c.owner_set.all():
                if o not in known:
                    s1 = superiors(o, codegen, known)
                    known = s1.union(known)
                    known.add(o)
        return known

    def update_used_codes(self):
        if self.update_used_codes_timestamp is None:
            attempts = self.attempt_set.all()
        else:
            attempts = self.attempt_set.filter(
                start__gte=self.update_used_codes_timestamp)
            self.update_used_codes_timestamp = timezone.now()
        for a in attempts:
            try:
                codegen = a.competitionquestionset.competition.competitor_code_generator
                codes = Code.objects.filter(value=a.access_code,
                                            salt=codegen.salt,
                                            format=codegen.format)
                for c in codes:
                    used_codes.add(c)
            except Exception, e:
                print e
                pass
示例#18
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class Auteur(CommonModel):
    # Une contrainte de base de données existe dans les migrations
    # pour éviter que les deux soient remplis.
    oeuvre = ForeignKey('Oeuvre',
                        null=True,
                        blank=True,
                        related_name='auteurs',
                        verbose_name=_('œuvre'),
                        on_delete=CASCADE)
    source = ForeignKey('Source',
                        null=True,
                        blank=True,
                        related_name='auteurs',
                        verbose_name=_('source'),
                        on_delete=CASCADE)
    # Une contrainte de base de données existe dans les migrations
    # pour éviter que les deux soient remplis.
    individu = ForeignKey('Individu',
                          related_name='auteurs',
                          null=True,
                          blank=True,
                          verbose_name=_('individu'),
                          on_delete=PROTECT)
    ensemble = ForeignKey('Ensemble',
                          related_name='auteurs',
                          null=True,
                          blank=True,
                          verbose_name=_('ensemble'),
                          on_delete=PROTECT)
    profession = ForeignKey('Profession',
                            related_name='auteurs',
                            null=True,
                            blank=True,
                            verbose_name=_('profession'),
                            on_delete=PROTECT)

    objects = AuteurManager()

    class Meta(object):
        verbose_name = _('auteur')
        verbose_name_plural = _('auteurs')
        ordering = ('profession', 'ensemble', 'individu')

    @staticmethod
    def invalidated_relations_when_saved(all_relations=False):
        return (
            'oeuvre',
            'source',
        )

    def html(self, tags=True):
        return force_text(AuteurBiGrouper((self, ), tags=tags))

    html.short_description = _('rendu HTML')
    html.allow_tags = True

    def clean(self):
        if self.oeuvre is not None and self.profession is None:
            raise ValidationError(
                {'profession': ugettext('This field is required.')})
        if self.individu_id is not None and self.ensemble_id is not None:
            msg = ugettext('« Individu » et « Ensemble » '
                           'ne peuvent être saisis sur la même ligne.')
            raise ValidationError({'individu': msg, 'ensemble': msg})
        if self.individu is not None and self.profession is not None:
            try:
                self.individu.professions.add(self.profession)
            except (Individu.DoesNotExist, Profession.DoesNotExist):
                pass

    def __eq__(self, other):
        if not isinstance(other, self.__class__):
            return False
        return self.individu == other.individu \
            and self.profession == other.profession

    def __str__(self):
        return self.html(tags=False)

    @permalink
    def get_absolute_url(self):
        return 'individu_detail', (self.individu_id, )
示例#19
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class WineDrinker(Versionable):
    name = CharField(max_length=200)
    glass_content = ForeignKey(Wine, related_name='drinkers', null=True)

    __str__ = versionable_description
 def __init__(self, **kwargs):
     kwargs.setdefault('to', User)
     kwargs.setdefault('null', True)
     kwargs.setdefault('blank', True)
     ForeignKey.__init__(self, **kwargs)
示例#21
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class AppRating(TranslatableModel):
    app = ForeignKey('App',
                     related_name='ratings',
                     verbose_name=_('App'),
                     on_delete=CASCADE)
    user = ForeignKey(settings.AUTH_USER_MODEL,
                      verbose_name=_('User'),
                      on_delete=CASCADE,
                      related_name='app_ratings')
    rating = FloatField(verbose_name=_('Rating'),
                        default=0.5,
                        help_text=_('Rating from 0.0 (worst) to 1.0 (best)'))
    rated_at = DateTimeField(auto_now=True, db_index=True)
    translations = TranslatedFields(
        comment=TextField(verbose_name=_('Rating comment'),
                          default='',
                          help_text=_('Rating comment in Markdown'),
                          blank=True))

    class Meta:
        unique_together = (('app', 'user'), )
        verbose_name = _('App rating')
        verbose_name_plural = _('App ratings')
        ordering = ('-rated_at', )

    def __str__(self) -> str:
        return str(self.rating)

    def save(self, *args, **kwargs):
        super().save(*args, **kwargs)
        # update rating on the app
        app = self.app
        day_range = settings.RATING_RECENT_DAY_RANGE
        threshold = settings.RATING_THRESHOLD
        rating, num = self._compute_app_rating(day_range, threshold)
        app.rating_recent = rating
        app.rating_num_recent = num
        rating, num = self._compute_app_rating(threshold=threshold)
        app.rating_overall = rating
        app.rating_num_overall = num
        app.save()

    def _compute_app_rating(self,
                            days: int = -1,
                            threshold: int = 5) -> Tuple[float, int]:
        """
        Computes an app rating based on
        :param days: passing 30 will only consider ratings from the last
        30 days,
         pass a negative number to include all ratings
        :param threshold: if the amount of ratings is lower than this
        number
        return 0.5
        :return: the app rating
        """
        app_ratings = AppRating.objects.filter(app=self.app)
        if days >= 0:
            range = timezone.now() - datetime.timedelta(days=days)
            app_ratings = app_ratings.filter(rated_at__gte=range)
        ratings = map(lambda r: r.rating, app_ratings)
        return compute_rating(list(ratings), threshold)
示例#22
0
class Service(Model):
    user = ForeignKey(User, verbose_name='User id', on_delete=CASCADE)
    car_model = CharField(verbose_name='Car model', max_length=100)
    description = TextField(verbose_name='Description')
    cost = FloatField(verbose_name='Cost')
    datetime = DateTimeField(verbose_name='Datetime', auto_now=True)
示例#23
0
class AppRelease(TranslatableModel):
    version = CharField(max_length=256,
                        verbose_name=_('Version'),
                        help_text=_('Version follows Semantic Versioning'))
    app = ForeignKey('App',
                     on_delete=CASCADE,
                     verbose_name=_('App'),
                     related_name='releases')
    # dependencies
    php_extensions = ManyToManyField(
        'PhpExtension',
        blank=True,
        through='PhpExtensionDependency',
        verbose_name=_('PHP extension dependency'))
    databases = ManyToManyField('Database',
                                blank=True,
                                through='DatabaseDependency',
                                verbose_name=_('Database dependency'))
    licenses = ManyToManyField('License', verbose_name=_('License'))
    shell_commands = ManyToManyField(
        'ShellCommand', blank=True, verbose_name=_('Shell command dependency'))
    php_version_spec = CharField(max_length=256,
                                 verbose_name=_('PHP version requirement'))
    platform_version_spec = CharField(
        max_length=256, verbose_name=_('Platform version requirement'))
    raw_php_version_spec = CharField(
        max_length=256, verbose_name=_('PHP version requirement (raw)'))
    raw_platform_version_spec = CharField(
        max_length=256, verbose_name=_('Platform version requirement (raw)'))
    min_int_size = IntegerField(blank=True,
                                default=32,
                                verbose_name=_('Minimum Integer bits'),
                                help_text=_('e.g. 32 for 32bit Integers'))
    download = URLField(max_length=256,
                        blank=True,
                        verbose_name=_('Archive download URL'))
    created = DateTimeField(auto_now_add=True,
                            editable=False,
                            verbose_name=_('Created at'))
    last_modified = DateTimeField(auto_now=True,
                                  editable=False,
                                  db_index=True,
                                  verbose_name=_('Updated at'))
    signature = TextField(
        verbose_name=_('Signature'),
        help_text=_('A signature using the app\'s certificate'))
    signature_digest = CharField(max_length=256,
                                 verbose_name=_('Signature hashing algorithm'))
    translations = TranslatedFields(changelog=TextField(
        verbose_name=_('Changelog'),
        help_text=_('The release changelog. Can contain Markdown'),
        default=''))
    is_nightly = BooleanField(verbose_name=_('Nightly'), default=False)

    class Meta:
        verbose_name = _('App release')
        verbose_name_plural = _('App releases')
        unique_together = (('app', 'version', 'is_nightly'), )
        ordering = ['-version']

    def can_update(self, user: User) -> bool:
        return self.app.owner == user or user in self.app.co_maintainers.all()

    def can_delete(self, user: User) -> bool:
        return self.can_update(user)

    def __str__(self) -> str:
        return '%s %s' % (self.app, self.version)

    def is_compatible(self, platform_version, inclusive=False):
        """Checks if a release is compatible with a platform version

        :param platform_version: the platform version, not required to be
                                 semver compatible
        :param inclusive: if True the check will also return True if an app
                          requires 9.0.1 and the given platform version is 9.0
        :return: True if compatible, otherwise false
        """

        min_version = Version(pad_min_version(platform_version))
        spec = Spec(self.platform_version_spec)
        if inclusive:
            max_version = Version(pad_max_inc_version(platform_version))
            return (min_version in spec or max_version in spec)
        else:
            return min_version in spec

    @property
    def is_unstable(self):
        return self.is_nightly or '-' in self.version
示例#24
0
class HomePage(Page):
    subpage_types = ['content.ContentPage']
    template = 'home.html'

    # Content fields
    subtitle = TextField(max_length=250, blank=True, default='')
    button_text = CharField(max_length=30, blank=True, default='')
    button_url = CharField(max_length=2048, blank=True, default='')
    image = ForeignKey(
        'mozimages.MozImage',
        null=True,
        blank=True,
        on_delete=SET_NULL,
        related_name='+'
    )
    featured = StreamField(
        StreamBlock([
            ('article', PageChooserBlock(required=False, target_model=(
                'articles.Article',
                'externalcontent.ExternalArticle',
            ))),
            ('external_page', FeaturedExternalBlock()),
        ], min_num=0, max_num=4),
        null=True,
        blank=True,
    )
    about_title = TextField(max_length=250, blank=True, default='')
    about_subtitle = TextField(max_length=250, blank=True, default='')
    about_button_text = CharField(max_length=30, blank=True, default='')
    about_button_url = URLField(max_length=140, blank=True, default='')

    # Card fields
    card_title = CharField('Title', max_length=140, blank=True, default='')
    card_description = TextField('Description', max_length=140, blank=True, default='')
    card_image = ForeignKey(
        'mozimages.MozImage',
        null=True,
        blank=True,
        on_delete=SET_NULL,
        related_name='+',
        verbose_name='Image',
    )

    # Meta fields
    keywords = ClusterTaggableManager(through=HomePageTag, blank=True)

    # Editor panel configuration
    content_panels = Page.content_panels + [
        MultiFieldPanel(
            [
                FieldPanel('subtitle'),
                FieldPanel('button_text'),
                FieldPanel('button_url'),
            ],
            heading="Header section",
        ),
        ImageChooserPanel('image'),
        StreamFieldPanel('featured'),
        MultiFieldPanel(
            [
                FieldPanel('about_title'),
                FieldPanel('about_subtitle'),
                FieldPanel('about_button_text'),
                FieldPanel('about_button_url'),
            ],
            heading="About section",
        )
    ]

    # Card panels
    card_panels = [
        FieldPanel('card_title'),
        FieldPanel('card_description'),
        ImageChooserPanel('card_image'),
    ]

    # Meta panels
    meta_panels = [
        MultiFieldPanel([
            FieldPanel('seo_title'),
            FieldPanel('search_description'),
            FieldPanel('keywords'),
        ], heading='SEO'),
    ]

    # Settings panels
    settings_panels = [
        FieldPanel('slug'),
    ]

    # Tabs
    edit_handler = TabbedInterface([
        ObjectList(content_panels, heading='Content'),
        ObjectList(card_panels, heading='Card'),
        ObjectList(meta_panels, heading='Meta'),
        ObjectList(settings_panels, heading='Settings', classname='settings'),
    ])

    @property
    def primary_topics(self):
        """The site’s top-level topics, i.e. topics without a parent topic."""
        from ..topics.models import Topic
        return Topic.objects.filter(parent_topics__isnull=True).live().public().order_by('title')
示例#25
0
class App(TranslatableModel):
    objects = AppManager()
    id = CharField(max_length=256,
                   unique=True,
                   primary_key=True,
                   verbose_name=_('ID'),
                   help_text=_('app ID, identical to folder name'))
    categories = ManyToManyField('Category', verbose_name=_('Category'))
    translations = TranslatedFields(
        name=CharField(max_length=256,
                       verbose_name=_('Name'),
                       help_text=_('Rendered app name for users')),
        summary=CharField(
            max_length=256,
            verbose_name=_('Summary'),
            help_text=_('Short text describing the app\'s purpose')),
        description=TextField(verbose_name=_('Description'),
                              help_text=_('Will be rendered as Markdown')))
    # resources
    user_docs = URLField(max_length=256,
                         blank=True,
                         verbose_name=_('User documentation URL'))
    admin_docs = URLField(max_length=256,
                          blank=True,
                          verbose_name=_('Admin documentation URL'))
    developer_docs = URLField(max_length=256,
                              blank=True,
                              verbose_name=_('Developer documentation URL'))
    issue_tracker = URLField(max_length=256,
                             blank=True,
                             verbose_name=_('Issue tracker URL'))
    website = URLField(max_length=256, blank=True, verbose_name=_('Homepage'))
    discussion = URLField(max_length=256, blank=True, verbose_name=_('Forum'))
    created = DateTimeField(auto_now_add=True,
                            editable=False,
                            verbose_name=_('Created at'))
    last_modified = DateTimeField(auto_now=True,
                                  editable=False,
                                  db_index=True,
                                  verbose_name=_('Updated at'))
    owner = ForeignKey(settings.AUTH_USER_MODEL,
                       verbose_name=_('App owner'),
                       on_delete=CASCADE,
                       related_name='owned_apps')
    co_maintainers = ManyToManyField(settings.AUTH_USER_MODEL,
                                     blank=True,
                                     verbose_name=_('Co-Maintainers'),
                                     related_name='co_maintained_apps')
    authors = ManyToManyField('AppAuthor',
                              blank=True,
                              related_name='apps',
                              verbose_name=_('App authors'))
    is_featured = BooleanField(verbose_name=_('Featured'), default=False)
    rating_recent = FloatField(verbose_name=_('Recent rating'), default=0.5)
    rating_overall = FloatField(verbose_name=_('Overall rating'), default=0.5)
    rating_num_recent = IntegerField(
        verbose_name=_('Number of recently submitted ratings'), default=0)
    rating_num_overall = IntegerField(
        verbose_name=_('Number of overall submitted ratings'), default=0)
    last_release = DateTimeField(editable=False,
                                 db_index=True,
                                 verbose_name=_('Last release at'),
                                 default=timezone.now)
    certificate = TextField(verbose_name=_('Certificate'))
    ownership_transfer_enabled = BooleanField(
        verbose_name=_('Ownership transfer enabled'),
        default=False,
        help_text=_('If enabled, a user can try to register the same app '
                    'again using the public certificate and signature. If he '
                    'does, the app will be transferred to him.'))

    class Meta:
        verbose_name = _('App')
        verbose_name_plural = _('Apps')

    def __str__(self) -> str:
        return self.name

    def can_update(self, user: User) -> bool:
        return self.owner == user or user in self.co_maintainers.all()

    def can_delete(self, user: User) -> bool:
        return self.owner == user

    @property
    def discussion_url(self):
        if self.discussion:
            return self.discussion
        else:
            return '%s/c/apps/%s' % (settings.DISCOURSE_URL,
                                     self.id.replace('_', '-'))

    def _get_grouped_releases(self, get_release_func):
        releases = NextcloudRelease.objects.all()
        versions = map(lambda r: r.version, releases)
        compatible_releases = map(lambda v: (v, get_release_func(v)), versions)
        grouped_releases = group_by_main_version(dict(compatible_releases))
        # deduplicate releases
        result = {}
        for version, releases in grouped_releases.items():
            result[version] = list(distinct(releases, lambda r: r.version))
        return result

    def releases_by_platform_v(self):
        """Looks up all compatible stable releases for each platform
        version.

        Example of returned dict:

        {'9.1': [<AppRelease object>, <AppRelease object>],
        '9.0': [<AppRelease object>]}

        :return dict with all compatible stable releases for each platform
                version.
        """
        return self._get_grouped_releases(self.compatible_releases)

    def unstable_releases_by_platform_v(self):
        """Looks up all compatible unstable releases for each platform version.

        Example of returned dict:

        {'9.1': [<AppRelease object>, <AppRelease object>],
        '9.0': [<AppRelease object>]}

        :return dict with all compatible unstable releases for each platform
                version.
        """
        return self._get_grouped_releases(self.compatible_unstable_releases)

    def latest_releases_by_platform_v(self):
        """Looks up the latest stable and unstable release for each platform
        version.

        Example of returned dict:

        {'9.1': {
            'stable': <AppRelease object>,
            'unstable': <AppRelease object>
        },
        '9.0': {
            'stable': <AppRelease object>
        }}

        :return dict with the latest stable and unstable release for each
                platform version.
        """
        stable = self.releases_by_platform_v()
        unstable = self.unstable_releases_by_platform_v()

        def filter_latest(pair):
            version, releases = pair
            return (version, self._latest(releases))

        latest_stable = dict(map(filter_latest, stable.items()))
        latest_unstable = dict(map(filter_latest, unstable.items()))
        all_versions = set(chain(latest_stable.keys(), latest_unstable.keys()))

        def stable_or_unstable_releases(ver):
            return (ver, {
                'stable': latest_stable.get(ver, None),
                'unstable': latest_unstable.get(ver, None)
            })

        return dict(map(stable_or_unstable_releases, all_versions))

    def compatible_releases(self, platform_version, inclusive=True):
        """Returns all stable releases of this app that are compatible
        with the given platform version.

        :param inclusive: Use inclusive version check (see
                          AppRelease.is_compatible()).
        :return a sorted list of all compatible stable releases.
        """

        return sorted(
            filter(
                lambda r: r.is_compatible(platform_version, inclusive) and
                not r.is_unstable, self.releases.all()),
            key=lambda r: AppSemVer(r.version, r.is_nightly, r.last_modified),
            reverse=True)

    def compatible_unstable_releases(self, platform_version, inclusive=True):
        """Returns all unstable releases of this app that are compatible with
        the given platform version.

        :param inclusive: Use inclusive version check (see
                          AppRelease.is_compatible()).
        :return a sorted list of all compatible unstable releases.
        """

        return sorted(
            filter(
                lambda r: r.is_compatible(platform_version, inclusive) and r.
                is_unstable, self.releases.all()),
            key=lambda r: AppSemVer(r.version, r.is_nightly, r.last_modified),
            reverse=True)

    def _latest(self, releases):
        try:
            return max(releases,
                       key=lambda r: AppSemVer(r.version, r.is_nightly, r.
                                               last_modified))
        except ValueError:
            return None

    def save(self, *args, **kwargs):
        # If the certificate has changed, delete all releases.
        try:
            if self.pk is not None:
                orig = App.objects.get(pk=self.pk)
                current = self.certificate.replace('\r', '').strip()
                former = orig.certificate.replace('\r', '').strip()
                # for some reason the django admin inserts \r\n for \n so
                # saving a model in the admin with the same cert kills all
                # releases
                if current != former:
                    self.releases.all().delete()
        except self.DoesNotExist:
            pass
        super().save(*args, **kwargs)
示例#26
0
class FilesystemGroup(CleanSave, TimestampedModel):
    """A filesystem group. Contains a set of filesystems that create
    a virtual block device. E.g. LVM Volume Group.

    :ivar uuid: UUID of the filesystem group.
    :ivar group_type: Type of filesystem group.
    :ivar name: Name of the filesytem group.
    :ivar create_params: Parameters that can be passed during the create
        command when the filesystem group is created.
    """
    class Meta(DefaultMeta):
        """Needed for South to recognize this model."""

    objects = FilesystemGroupManager()

    uuid = CharField(max_length=36,
                     unique=True,
                     null=False,
                     blank=False,
                     editable=False)

    group_type = CharField(max_length=20,
                           null=False,
                           blank=False,
                           choices=FILESYSTEM_GROUP_TYPE_CHOICES)

    name = CharField(max_length=255, null=False, blank=False)

    create_params = CharField(max_length=255, null=True, blank=True)

    cache_mode = CharField(max_length=20,
                           null=True,
                           blank=True,
                           choices=CACHE_MODE_TYPE_CHOICES)

    cache_set = ForeignKey(CacheSet, null=True, blank=True, on_delete=CASCADE)

    def __str__(self):
        return '%s device %s %d' % (self.group_type, self.name, self.id)

    @property
    def virtual_device(self):
        """Return the linked `VirtualBlockDevice`.

        This should never be called when the group_type is LVM_VG.
        `virtual_devices` should be used in that case, since LVM_VG
        supports multiple `VirtualBlockDevice`s.
        """
        if self.is_lvm():
            raise AttributeError("virtual_device should not be called when "
                                 "group_type = LVM_VG.")
        else:
            # Return the first `VirtualBlockDevice` since it is the only one.
            # Using 'all()' instead of 'first()' so that if it was precached
            # that cache will be used.
            return get_one(self.virtual_devices.all())

    def get_node(self):
        """`Node` this filesystem group belongs to."""
        if self.filesystems.count() == 0:
            return None
        return self.filesystems.first().get_node()

    def get_size(self):
        """Size of this filesystem group.

        Calculated from the total size of all filesystems in this group.
        Its not calculated from its virtual_block_device size. The linked
        `VirtualBlockDevice` should calculate its size from this filesystem
        group.
        """
        if self.is_lvm():
            return self.get_lvm_size()
        elif self.is_raid():
            return self.get_raid_size()
        elif self.is_bcache():
            return self.get_bcache_size()
        else:
            return 0

    def get_lvm_size(self):
        """Size of this LVM volume group.

        Calculated from the total size of all filesystems in this group.
        Its not calculated from its virtual_block_device size.

        Note: Should only be called when the `group_type` is LVM_VG.
        """
        filesystems = list(self.filesystems.all())
        if len(filesystems) == 0:
            return 0
        else:
            pv_total_size = sum(filesystem.get_size()
                                for filesystem in filesystems)
            number_of_extents, _ = divmod(pv_total_size, LVM_PE_SIZE)
            # Reserve one extent per filesystem for LVM headers - lp:1517129.
            return (number_of_extents - len(filesystems)) * LVM_PE_SIZE

    def get_smallest_filesystem_size(self):
        """Return the smallest filesystem size."""
        filesystems = list(self.filesystems.all())
        if len(filesystems) == 0:
            return 0
        else:
            return min(filesystem.get_size() for filesystem in filesystems)

    def get_raid_size(self):
        """Size of this RAID.

        Calculated based on the RAID type and how output size based on that
        type. The size will be calculated using the smallest size filesystem
        attached to this RAID. The linked `VirtualBlockDevice` should
        calculate its size from this filesystem group.

        Note: Should only be called when the `group_type` is in
            `FILESYSTEM_GROUP_RAID_TYPES`.
        """
        min_size = self.get_smallest_filesystem_size()
        if min_size <= 0:
            # Possible when no filesytems are attached to this group.
            return 0
        elif self.group_type == FILESYSTEM_GROUP_TYPE.RAID_0:
            return min_size * self.filesystems.count()
        elif self.group_type == FILESYSTEM_GROUP_TYPE.RAID_1:
            return min_size
        else:
            num_raid = len([
                fstype for fstype in self._get_all_fstypes()
                if fstype == FILESYSTEM_TYPE.RAID
            ])
            if self.group_type == FILESYSTEM_GROUP_TYPE.RAID_5:
                return min_size * (num_raid - 1)
            elif self.group_type == FILESYSTEM_GROUP_TYPE.RAID_6:
                return min_size * (num_raid - 2)
            elif self.group_type == FILESYSTEM_GROUP_TYPE.RAID_10:
                return min_size * num_raid / 2
        raise ValidationError("Unknown raid type: %s" % self.group_type)

    def get_bcache_backing_filesystem(self):
        """Return the filesystem that is the backing device for the Bcache."""
        for filesystem in self.filesystems.all():
            if filesystem.fstype == FILESYSTEM_TYPE.BCACHE_BACKING:
                return filesystem
        return None

    def get_bcache_backing_block_device(self):
        """Return the block_device that is the backing device for the Bcache.

        This will return the block device even if the backing is a partition.
        """
        filesystem = self.get_bcache_backing_filesystem()
        if filesystem is not None:
            if filesystem.block_device is not None:
                return filesystem.block_device
            else:
                return filesystem.partition.partition_table.block_device
        return None

    def get_bcache_size(self):
        """Size of this Bcache.

        Calculated based on the size of the backing device. The linked
        `VirtualBlockDevice` should calculate its size from this
        filesystem group.

        Note: Should only be called when the `group_type` is BCACHE.
        """
        backing_filesystem = self.get_bcache_backing_filesystem()
        if backing_filesystem is None:
            return 0
        else:
            return backing_filesystem.get_size()

    def get_lvm_allocated_size(self, skip_volumes=[]):
        """Returns the space already allocated to virtual block devices.

        Calculated from the total size of all virtual block devices in this
        group.
        """
        return sum(logical_volume.size
                   for logical_volume in self.virtual_devices.all()
                   if logical_volume not in skip_volumes)

    def get_lvm_free_space(self, skip_volumes=[]):
        """Returns the total unallocated space on this FilesystemGroup"""
        return self.get_lvm_size() - self.get_lvm_allocated_size(
            skip_volumes=skip_volumes)

    def clean(self, *args, **kwargs):
        super(FilesystemGroup, self).clean(*args, **kwargs)

        # We allow the initial save to skip model validation, any
        # additional saves required filesystems linked. This is because the
        # object needs to exist in the database before the filesystems can
        # be linked.
        if not self.id:
            return

        # Grab all filesystems so that if the filesystems have been precached
        # it will be used. This prevents extra database queries.
        filesystems = list(self.filesystems.all())

        # Must at least have a filesystem added to the group.
        if len(filesystems) == 0:
            raise ValidationError(
                "At least one filesystem must have been added.")

        # All filesystems must belong all to the same node.
        nodes = {filesystem.get_node() for filesystem in filesystems}
        if len(nodes) > 1:
            raise ValidationError(
                "All added filesystems must belong to the same node.")

        # Validate all the different group types.
        if self.is_lvm():
            self._validate_lvm(filesystems=filesystems)
        elif self.is_raid():
            self._validate_raid(filesystems=filesystems)
        elif self.is_bcache():
            self._validate_bcache(filesystems=filesystems)

    def is_lvm(self):
        """Return True if `group_type` is LVM_VG type."""
        return self.group_type == FILESYSTEM_GROUP_TYPE.LVM_VG

    def is_raid(self):
        """Return True if `group_type` is a RAID type."""
        return self.group_type in FILESYSTEM_GROUP_RAID_TYPES

    def is_bcache(self):
        """Return True if `group_type` is BCACHE type."""
        return self.group_type == FILESYSTEM_GROUP_TYPE.BCACHE

    def _get_all_fstypes(self, filesystems=None):
        """Return list of all filesystem types attached."""
        # Grab all filesystems so that if the filesystems have been
        # precached it will be used. This prevents extra database queries.
        if filesystems is None:
            filesystems = list(self.filesystems.all())
        return [filesystem.fstype for filesystem in filesystems]

    def _validate_lvm(self, filesystems=None):
        """Validate attached filesystems are correct type for LVM_VG.
        """
        if not self.is_lvm():
            return
        unique_fstypes = set(self._get_all_fstypes(filesystems=filesystems))
        if unique_fstypes != set([FILESYSTEM_TYPE.LVM_PV]):
            raise ValidationError(
                "Volume group can only contain lvm physical volumes.")

    def _validate_raid(self, filesystems=None):
        """Validate attached filesystems are correct count and type for RAID.
        """
        if not self.is_raid():
            return
        fstypes = self._get_all_fstypes(filesystems=filesystems)
        num_raid = len(
            [fstype for fstype in fstypes if fstype == FILESYSTEM_TYPE.RAID])
        num_raid_spare = len([
            fstype for fstype in fstypes
            if fstype == FILESYSTEM_TYPE.RAID_SPARE
        ])
        if self.group_type == FILESYSTEM_GROUP_TYPE.RAID_0:
            # RAID 0 can contain 2 or more RAID filesystems and no spares are
            # allowed.
            if num_raid < 2 or num_raid_spare != 0:
                raise ValidationError(
                    "RAID level 0 must have at least 2 raid devices and "
                    "no spares.")
        elif self.group_type == FILESYSTEM_GROUP_TYPE.RAID_1:
            # RAID 1 must have at least 2 RAID filesystems.
            if num_raid < 2:
                raise ValidationError(
                    "RAID level 1 must have at least 2 raid devices and "
                    "any number of spares.")
        elif self.group_type == FILESYSTEM_GROUP_TYPE.RAID_5:
            # RAID 5 must have at least 3 RAID filesystems, but can have
            # spares.
            if num_raid < 3:
                raise ValidationError(
                    "RAID level 5 must have at least 3 raid devices and "
                    "any number of spares.")
        elif self.group_type == FILESYSTEM_GROUP_TYPE.RAID_6:
            # RAID 6 must have at least 4 RAID filesystems, but can have
            # spares.
            if num_raid < 4:
                raise ValidationError(
                    "RAID level 6 must have at least 4 raid devices and "
                    "any number of spares.")
        elif self.group_type == FILESYSTEM_GROUP_TYPE.RAID_10:
            # RAID 10 must have at least 4 RAID filesystems, but can have
            # spares.
            if num_raid < 3:
                raise ValidationError(
                    "RAID level 10 must have at least 3 raid devices and "
                    "any number of spares.")
        num_raid_invalid = len([
            fstype for fstype in fstypes
            if (fstype != FILESYSTEM_TYPE.RAID
                and fstype != FILESYSTEM_TYPE.RAID_SPARE)
        ])
        if num_raid_invalid > 0:
            raise ValidationError(
                "RAID can only contain raid device and raid spares.")

    def _validate_bcache(self, filesystems=None):
        """Validate attached filesystems are correct type for BCACHE.
        """
        if not self.is_bcache():
            return
        # Circular imports.
        from maasserver.models.virtualblockdevice import VirtualBlockDevice
        filesystems = [
            filesystem.fstype for filesystem in self.filesystems.all()
        ]
        if filesystems != [FILESYSTEM_TYPE.BCACHE_BACKING]:
            raise ValidationError(
                "Bcache can only contain one backing device.")
        backing_block_device = self.get_bcache_backing_block_device()
        backing_block_device = backing_block_device.actual_instance
        if isinstance(backing_block_device, VirtualBlockDevice):
            if backing_block_device.filesystem_group.is_lvm():
                raise ValidationError(
                    "Bcache cannot use a logical volume as a backing device.")
        if self.cache_mode is None:
            raise ValidationError("Bcache requires cache mode to be set.")
        if self.cache_set is None:
            raise ValidationError("Bcache requires an assigned cache set.")

    def save(self, *args, **kwargs):
        # Prevent the group_type from changing. This is not supported and will
        # break the linked filesystems and the created virtual block device(s).
        if self.pk is not None and self._state.has_changed('group_type'):
            orig_type = self._state.get_old_value('group_type')
            if orig_type != self.group_type:
                raise ValidationError(
                    "Cannot change the group_type of a FilesystemGroup.")

        # Prevent saving if the size of the volume group is now smaller than
        # the total size of logical volumes.
        if (self.group_type == FILESYSTEM_GROUP_TYPE.LVM_VG
                and self.get_lvm_free_space() < 0):
            raise ValidationError(
                "Volume group cannot be smaller than its logical volumes.")

        # Set the name correctly based on the type and generate a new UUID
        # if needed.
        if self.group_type is not None and self.name is None:
            self.name = FilesystemGroup.objects.get_available_name_for(self)
        if not self.uuid:
            self.uuid = uuid4()
        super(FilesystemGroup, self).save(*args, **kwargs)

        # Update or create the virtual block device when the filesystem group
        # is saved. Does nothing if group_type is LVM_VG. Virtual block device
        # is not created until filesystems are linked because the filesystems
        # contain the node that this filesystem group belongs to.
        if self.filesystems.count() > 0:
            from maasserver.models.virtualblockdevice import VirtualBlockDevice
            VirtualBlockDevice.objects.create_or_update_for(self)

    def delete(self, force=False):
        """Delete from the database.

        :param force: Delete any related object that prevents this object
            from being deleted.
        """
        if self.is_lvm():
            if self.virtual_devices.count() > 0:
                if force:
                    # Delete the linked virtual block devices, since the
                    # deletion of this object is forced.
                    self.virtual_devices.all().delete()
                else:
                    # Don't allow the filesystem group to be deleted if virtual
                    # block devices are linked. You cannot delete a volume
                    # group that has logical volumes.
                    raise ValidationError(
                        "This volume group has logical volumes; it cannot be "
                        "deleted.")
        else:
            # For the other types we delete the virtual block device.
            virtual_device = self.virtual_device
            if virtual_device is not None:
                self.virtual_device.delete()

        # Possible that the virtual block device has already deleted the
        # filesystem group. Skip the call if no id is set.
        if self.id is not None:
            super(FilesystemGroup, self).delete()

    def get_nice_name(self):
        """Return the nice name for the filesystem group.

        This is used when showing error or log messages.
        """
        if self.is_lvm():
            return "volume group"
        elif self.is_raid():
            return "RAID"
        elif self.is_bcache():
            return "Bcache"
        else:
            raise ValueError("Unknown group_type.")

    def get_name_prefix(self):
        """Return the prefix that should be used when setting the name of
        this FilesystemGroup."""
        if self.is_lvm():
            return "vg"
        elif self.is_raid():
            return "md"
        elif self.is_bcache():
            return "bcache"
        else:
            raise ValidationError("Unknown group_type.")

    def get_virtual_block_device_block_size(self):
        """Return the block size that should be used on a created
        `VirtualBlockDevice` for this filesystem group."""
        if self.is_lvm():
            # Default for logical volume in LVM is 4096.
            return 4096
        elif self.is_raid():
            # mdadm by default creates raid devices with 512 block size.
            return 512
        elif self.is_bcache():
            # Bcache uses the block_size of the backing device.
            return self.get_bcache_backing_filesystem().get_block_size()
        else:
            raise ValidationError("Unknown group_type.")
示例#27
0
class SQLQuery(models.Model):
    query = TextField()
    start_time = DateTimeField(null=True, blank=True, default=timezone.now)
    end_time = DateTimeField(null=True, blank=True)
    time_taken = FloatField(blank=True, null=True)
    request = ForeignKey('Request',
                         related_name='queries',
                         null=True,
                         blank=True,
                         db_index=True)
    traceback = TextField()
    objects = SQLQueryManager()

    @property
    def traceback_ln_only(self):
        return '\n'.join(self.traceback.split('\n')[::2])

    @property
    def formatted_query(self):
        return sqlparse.format(self.query, reindent=True, keyword_case='upper')

    # TODO: Surely a better way to handle this? May return false positives
    @property
    def num_joins(self):
        return self.query.lower().count('join ')

    @property
    def tables_involved(self):
        """A rreally ather rudimentary way to work out tables involved in a query.
        TODO: Can probably parse the SQL using sqlparse etc and pull out table info that way?"""
        components = [x.strip() for x in self.query.split()]
        tables = []
        for idx, c in enumerate(components):
            # TODO: If django uses aliases on column names they will be falsely identified as tables...
            if c.lower() == 'from' or c.lower() == 'join' or c.lower() == 'as':
                try:
                    nxt = components[idx + 1]
                    if not nxt.startswith('('):  # Subquery
                        stripped = nxt.strip().strip(',')
                        if stripped:
                            tables.append(stripped)
                except IndexError:  # Reach the end
                    pass
        return tables

    @transaction.atomic()
    def save(self, *args, **kwargs):
        if self.end_time and self.start_time:
            interval = self.end_time - self.start_time
            self.time_taken = interval.total_seconds() * 1000
        if not self.pk:
            if self.request:
                self.request.num_sql_queries += 1
                self.request.save()
        super(SQLQuery, self).save(*args, **kwargs)

    @transaction.atomic()
    def delete(self, *args, **kwargs):
        self.request.num_sql_queries -= 1
        self.request.save()
        super(SQLQuery, self).delete(*args, **kwargs)
示例#28
0
class Task(AbstractEntity):
    """Defines the workflow task"""
    request = ForeignKey(Request, related_name='tasks')
    assignee = ForeignKey(Group)
    updated_by = ForeignKey(User)
    activity_ref = CharField(max_length=100)
    status = CharField(verbose_name="Status",
                       max_length=30,
                       choices=TASK_STATUS)

    @property
    def activity(self):
        """Returns the activity associated with the task"""
        flow = flow_config(self.request.module_ref).FLOW
        return getattr(self, flow[self.activity_ref]['model']().title.lower(),
                       None)

    @property
    def is_active(self):
        """Checks if the current task is active / most recent"""
        return self == self.request.tasks.latest('id')

    @property
    def is_final(self):
        """Checks if the current task is final / end task"""
        transitions = transition_config(self.request.module_ref,
                                        self.activity_ref)

        return not transitions

    @property
    def previous(self):
        """Returns previous task"""
        return Task.objects.filter(request=self.request,
                                   id__lt=self.id).latest('id')

    @property
    def can_view_activity(self):
        """Checks if activity can be viewed"""
        return self.activity

    @property
    def can_initiate_activity(self):
        """Checks if new activity can be initiated"""
        return not self.activity

    @property
    def can_revise_activity(self):
        """Checks if activity can be revised"""
        return all([self.activity, self.is_active])

    @property
    def can_rollback(self):
        """Checks if activity can be rolled back"""
        return not any([self.activity.is_initial, self.status == 'Completed'])

    def initiate(self):
        """Initializes the task"""
        self.status = 'In Progress'
        self.save()

    def submit(self, module, user, next_activity=None):
        """Submits the task"""
        config = flow_config(module)
        transitions = transition_config(module, self.activity_ref)
        role = Group.objects.get(name=config.FLOW[next_activity]['role'])

        self.status = 'Completed'
        self.save()

        if transitions is not None:
            Task.objects.create(request=self.request,
                                assignee=role,
                                updated_by=user,
                                activity_ref=next_activity,
                                status='Not Started')
        else:
            self.request.status = 'Completed'
            self.request.save()

    def rollback(self):
        """Rollback to previous task"""
        previous = self.previous
        previous.status = 'Rolled Back'
        previous.save()
        self.status = 'Rolled Back'
        self.save()

        # Clone Task
        task = self.previous
        task.id = None
        task.status = 'Not Started'
        task.save()

        # Clone Activity
        activity = self.previous.activity
        activity.id = None
        activity.task = task
        activity.save()
示例#29
0
class Request(FeedbackTrait):
    requested_by = ForeignKey('yunity.User', null=True)

    time = DateTimeField(null=True)
    status = MaxLengthCharField()
示例#30
0
class Person(BasePage):
    resource_type = "person"
    parent_page_types = ["People"]
    subpage_types = []
    template = "person.html"

    # Content fields
    nickname = CharField(max_length=250, null=True, blank=True)
    job_title = CharField(max_length=250)
    role = CharField(max_length=250, choices=ROLE_CHOICES, default="staff")
    description = RichTextField(
        "About",
        blank=True,
        default="",
        features=RICH_TEXT_FEATURES_SIMPLE,
        help_text="Optional ‘About me’ section content, supports rich text",
    )

    # Card fields
    card_title = CharField("Title", max_length=140, blank=True, default="")
    card_description = TextField("Description",
                                 max_length=DESCRIPTION_MAX_LENGTH,
                                 blank=True,
                                 default="")
    card_image = ForeignKey(
        "mozimages.MozImage",
        null=True,
        blank=True,
        on_delete=SET_NULL,
        related_name="+",
        verbose_name="Image",
        help_text="An image in 16:9 aspect ratio",
    )

    # Meta
    city = CharField(max_length=250, blank=True, default="")
    country = CountryField(verbose_name="Country or Region",
                           blank=True,
                           default="")
    twitter = CharField(max_length=250, blank=True, default="")
    facebook = CharField(max_length=250, blank=True, default="")
    linkedin = CharField(max_length=250, blank=True, default="")
    github = CharField(max_length=250, blank=True, default="")
    email = CharField(max_length=250, blank=True, default="")
    websites = StreamField(
        StreamBlock([("website", PersonalWebsiteBlock())],
                    max_num=3,
                    required=False),
        null=True,
        blank=True,
        help_text="Optional links to any other personal websites",
    )
    keywords = ClusterTaggableManager(through=PersonTag, blank=True)

    # Content panels
    content_panels = [
        MultiFieldPanel(
            [
                CustomLabelFieldPanel("title", label="Full name"),
                FieldPanel("nickname"),
                FieldPanel("job_title"),
                FieldPanel("role"),
            ],
            heading="Details",
        ),
        FieldPanel("description"),
    ]

    # Card panels
    card_panels = [
        FieldPanel("card_title"),
        FieldPanel("card_description"),
        MultiFieldPanel(
            [ImageChooserPanel("card_image")],
            heading="16:9 Image",
            help_text=(
                "Image used for representing this page as a Card. "
                "Should be 16:9 aspect ratio. "
                "If not specified a fallback will be used. "
                "This image is also shown when sharing this page via social "
                "media unless a social image is specified."),
        ),
    ]

    # Meta panels
    meta_panels = [
        MultiFieldPanel(
            [FieldPanel("city"), FieldPanel("country")],
            heading="Location",
            help_text=("Location fields. The country field is also filterable "
                       "via the people directory page."),
        ),
        MultiFieldPanel([InlinePanel("topics")],
                        heading="Topics this person specializes in"),
        MultiFieldPanel(
            [
                FieldPanel("twitter"),
                FieldPanel("facebook"),
                FieldPanel("linkedin"),
                FieldPanel("github"),
                FieldPanel("email"),
            ],
            heading="Profiles",
            help_text="",
        ),
        StreamFieldPanel("websites"),
        MultiFieldPanel(
            [
                FieldPanel("seo_title"),
                FieldPanel("search_description"),
                ImageChooserPanel("social_image"),
                FieldPanel("keywords"),
            ],
            heading="SEO",
            help_text=(
                "Optional fields to override the default title and description "
                "for SEO purposes"),
        ),
    ]

    # Settings panels
    settings_panels = BasePage.settings_panels + [FieldPanel("slug")]

    # Tabs
    edit_handler = TabbedInterface([
        ObjectList(content_panels, heading="Content"),
        ObjectList(card_panels, heading="Card"),
        ObjectList(meta_panels, heading="Meta"),
        ObjectList(settings_panels, heading="Settings", classname="settings"),
    ])

    # Search config
    search_fields = BasePage.search_fields + [  # Inherit search_fields from Page
        # "title" is already specced in BasePage
        index.SearchField("description"),
        # Add FilterFields for things we may be filtering on (eg topics)
        index.FilterField("slug"),
    ]

    @property
    def display_title(self):
        """
        Return the display title for profile pages. Adds a nickname to the
        person's full name when one is provided.
        """
        return f'{self.title} aka "{self.nickname}"' if self.nickname else self.title

    @property
    def events(self):
        """
        Return upcoming events where this person is a speaker,
        ordered by start date
        """
        from ..events.models import Event

        upcoming_events = Event.published_objects.filter(
            start_date__gte=get_past_event_cutoff())

        speaker_events = Event.published_objects.none()

        for event in upcoming_events.all():
            # add the event to the list if the current person is a speaker
            if event.has_speaker(self):
                speaker_events = speaker_events | Event.published_objects.page(
                    event)

        return speaker_events.order_by("start_date")

    @property
    def articles(self):
        """
        Return articles and external articles where this person is (one of) the authors,
        ordered by article date, most recent first
        """
        from ..articles.models import Article
        from ..externalcontent.models import ExternalArticle

        articles = Article.published_objects.none()
        external_articles = ExternalArticle.published_objects.none()

        all_articles = Article.published_objects.all()
        all_external_articles = ExternalArticle.published_objects.all()

        for article in all_articles:
            if article.has_author(self):
                articles = articles | Article.published_objects.page(article)

        for external_article in all_external_articles:
            if external_article.has_author(self):
                external_articles = external_articles | (
                    ExternalArticle.published_objects.page(external_article))

        return sorted(chain(articles, external_articles),
                      key=attrgetter("date"),
                      reverse=True)

    @property
    def videos(self):
        """
        Return the most recent videos and external videos where this person is (one of)
        the speakers.
        """
        from ..videos.models import Video
        from ..externalcontent.models import ExternalVideo

        videos = Video.published_objects.none()
        external_videos = ExternalVideo.published_objects.none()

        all_videos = Video.published_objects.all()
        all_external_videos = ExternalVideo.published_objects.all()

        for video in all_videos:
            if video.has_speaker(self):
                videos = videos | Video.published_objects.page(video)

        for external_video in all_external_videos:
            if external_video.has_speaker(self):
                external_videos = external_videos | (
                    ExternalVideo.published_objects.page(external_video))

        return sorted(chain(videos, external_videos),
                      key=attrgetter("date"),
                      reverse=True)

    @property
    def role_group(self):
        return {
            "slug": self.role,
            "title": dict(ROLE_CHOICES).get(self.role, "")
        }

    @property
    def country_group(self):
        return ({
            "slug": self.country.code.lower(),
            "title": self.country.name
        } if self.country else {
            "slug": ""
        })

    def get_topics(self) -> List:
        """Return the live/published Topic pages associated with this Person"""

        # Note that we do this in Python because django-modelcluster won't support
        # `filter(topic__live=True)` when _previewing_ pages (even tho it'll work
        # on saved ones)
        topics = [pt.topic for pt in self.topics.all()]
        return [t for t in topics if t.live]
示例#31
0
class VersionTrait(BaseModel):
    _VersionTrait_to_BaseModel = OneToOneField('yunity.BaseModel', parent_link=True)

    next_version = ForeignKey('self', null=True, related_name='previous_version')
示例#32
0
class StaticIPAddress(CleanSave, TimestampedModel):
    class Meta(DefaultMeta):
        verbose_name = "Static IP Address"
        verbose_name_plural = "Static IP Addresses"
        unique_together = ("alloc_type", "ip")

    # IP can be none when a DHCP lease has expired: in this case the entry
    # in the StaticIPAddress only materializes the connection between an
    # interface and a subnet.
    ip = MAASIPAddressField(
        unique=False,
        null=True,
        editable=False,
        blank=True,
        default=None,
        verbose_name="IP",
    )

    alloc_type = IntegerField(editable=False,
                              null=False,
                              blank=False,
                              default=IPADDRESS_TYPE.AUTO)

    # Subnet is only null for IP addresses allocate before the new networking
    # model.
    subnet = ForeignKey("Subnet",
                        editable=True,
                        blank=True,
                        null=True,
                        on_delete=CASCADE)

    user = ForeignKey(
        User,
        default=None,
        blank=True,
        null=True,
        editable=False,
        on_delete=PROTECT,
    )

    # Used only by DISCOVERED address to set the lease_time for an active
    # lease. Time is in seconds.
    lease_time = IntegerField(default=0,
                              editable=False,
                              null=False,
                              blank=False)

    # Used to mark a `StaticIPAddress` as temperary until the assignment
    # can be confirmed to be free in the subnet.
    temp_expires_on = DateTimeField(null=True,
                                    blank=True,
                                    editable=False,
                                    db_index=True)

    objects = StaticIPAddressManager()

    def __str__(self):
        # Attempt to show the symbolic alloc_type name if possible.
        type_names = map_enum_reverse(IPADDRESS_TYPE)
        strtype = type_names.get(self.alloc_type, "%s" % self.alloc_type)
        return "%s:type=%s" % (self.ip, strtype)

    @property
    def alloc_type_name(self):
        """Returns a human-readable representation of the `alloc_type`."""
        return IPADDRESS_TYPE_CHOICES_DICT.get(self.alloc_type, "")

    def get_node(self):
        """Return the Node of the first Interface connected to this IP
        address."""
        interface = self.get_interface()
        if interface is not None:
            return interface.get_node()
        else:
            return None

    def get_interface(self):
        """Return the first Interface connected to this IP address."""
        # Note that, while this relationship is modeled as a many-to-many,
        # MAAS currently only relates a single interface per IP address
        # at this time. In the future, we may want to model virtual IPs, in
        # which case this will need to change.
        interface = self.interface_set.first()
        return interface

    def get_interface_link_type(self):
        """Return the `INTERFACE_LINK_TYPE`."""
        if self.alloc_type == IPADDRESS_TYPE.AUTO:
            return INTERFACE_LINK_TYPE.AUTO
        elif self.alloc_type == IPADDRESS_TYPE.DHCP:
            return INTERFACE_LINK_TYPE.DHCP
        elif self.alloc_type == IPADDRESS_TYPE.USER_RESERVED:
            return INTERFACE_LINK_TYPE.STATIC
        elif self.alloc_type == IPADDRESS_TYPE.STICKY:
            if not self.ip:
                return INTERFACE_LINK_TYPE.LINK_UP
            else:
                return INTERFACE_LINK_TYPE.STATIC
        else:
            raise ValueError("Unknown alloc_type.")

    def get_log_name_for_alloc_type(self):
        """Return a nice log name for the `alloc_type` of the IP address."""
        return IPADDRESS_TYPE_CHOICES_DICT[self.alloc_type]

    def is_linked_to_one_unknown_interface(self):
        """Return True if the IP address is only linked to one unknown
        interface."""
        interface_types = [
            interface.type for interface in self.interface_set.all()
        ]
        return interface_types == [INTERFACE_TYPE.UNKNOWN]

    def get_related_discovered_ip(self):
        """Return the related DISCOVERED IP address for this IP address. This
        comes from looking at the DISCOVERED IP addresses assigned to the
        related interfaces.
        """
        interfaces = list(self.interface_set.all())
        discovered_ips = [
            ip for ip in StaticIPAddress.objects.filter(
                interface__in=interfaces,
                alloc_type=IPADDRESS_TYPE.DISCOVERED,
                ip__isnull=False,
            ).order_by("-id") if ip.ip
        ]
        if len(discovered_ips) > 0:
            return discovered_ips[0]
        else:
            return None

    def get_ip(self):
        """Return the IP address assigned."""
        ip, subnet = self.get_ip_and_subnet()
        return ip

    def get_ip_and_subnet(self):
        """Return the IP address and subnet assigned.

        For all alloc_types except DHCP it returns `ip` and `subnet`. When
        `alloc_type` is DHCP it returns the associated DISCOVERED `ip` and
        `subnet` on the same linked interfaces.
        """
        if self.alloc_type == IPADDRESS_TYPE.DHCP:
            discovered_ip = self.get_related_discovered_ip()
            if discovered_ip is not None:
                return discovered_ip.ip, discovered_ip.subnet
        return self.ip, self.subnet

    def deallocate(self):
        """Mark this IP address as no longer in use.
        After return, this object is no longer valid.
        """
        self.delete()

    def clean_subnet_and_ip_consistent(self):
        """Validate that the IP address is inside the subnet."""

        # USER_RESERVED addresses must have an IP address specified.
        # Blank AUTO, STICKY and DHCP addresses have a special meaning:
        # - Blank AUTO addresses mean the interface will get an IP address
        #   auto assigned when it goes to be deployed.
        # - Blank STICKY addresses mean the interface should come up and be
        #   associated with a particular Subnet, but no IP address should
        #   be assigned.
        # - DHCP IP addresses are always blank. The model will look for
        #   a DISCOVERED IP address on the same interface to map to the DHCP
        #   IP address with `get_ip()`.
        if self.alloc_type == IPADDRESS_TYPE.USER_RESERVED:
            if not self.ip:
                raise ValidationError(
                    {"ip": ["IP address must be specified."]})
        if self.alloc_type == IPADDRESS_TYPE.DHCP:
            if self.ip:
                raise ValidationError(
                    {"ip": ["IP address must not be specified."]})

        if self.ip and self.subnet and self.subnet.cidr:
            address = self.get_ipaddress()
            network = self.subnet.get_ipnetwork()
            if address not in network:
                raise ValidationError({
                    "ip": [
                        "IP address %s is not within the subnet: %s." %
                        (str(address), str(network))
                    ]
                })

    def get_ipaddress(self):
        """Returns this StaticIPAddress wrapped in an IPAddress object.

        :return: An IPAddress, (or None, if the IP address is unspecified)
        """
        if self.ip:
            return IPAddress(self.ip)
        else:
            return None

    def get_mac_addresses(self):
        """Return set of all MAC's linked to this ip."""
        return set(interface.mac_address
                   for interface in self.interface_set.all())

    def clean(self, *args, **kwargs):
        super(StaticIPAddress, self).clean(*args, **kwargs)
        self.clean_subnet_and_ip_consistent()

    def validate_unique(self, exclude=None):
        """Overrides Django's default for validating unique columns.

        Django's ORM has a misfeature: `Model.validate_unique` -- which our
        CleanSave mix-in calls -- checks every unique key against the database
        before actually saving the row. Django runs READ COMMITTED by default,
        which means there's a racey period between the uniqueness validation
        check and the actual insert.
        """
        pass

    def _set_subnet(self, subnet, interfaces=None):
        """Resets the Subnet for this StaticIPAddress, making sure to update
        the VLAN for a related Interface (if the VLAN has changed).
        """
        self.subnet = subnet
        if interfaces is not None:
            for iface in interfaces:
                if (iface is not None and subnet is not None
                        and iface.vlan_id != subnet.vlan_id):
                    iface.vlan = subnet.vlan
                    iface.save()

    def render_json(self, with_username=False, with_summary=False):
        """Render a representation of this `StaticIPAddress` object suitable
        for converting to JSON. Includes optional parameters wherever a join
        would be implied by including a specific piece of information."""
        # Circular imports.
        # XXX mpontillo 2016-03-11 we should do the formatting client side.
        from maasserver.websockets.base import dehydrate_datetime

        data = {
            "ip": self.ip,
            "alloc_type": self.alloc_type,
            "created": dehydrate_datetime(self.created),
            "updated": dehydrate_datetime(self.updated),
        }
        if with_username and self.user is not None:
            data["user"] = self.user.username
        if with_summary:
            iface = self.get_interface()
            node = self.get_node()
            if node is not None:
                data["node_summary"] = {
                    "system_id": node.system_id,
                    "node_type": node.node_type,
                    "fqdn": node.fqdn,
                    "hostname": node.hostname,
                    "is_container": node.parent_id is not None,
                }
                if iface is not None:
                    data["node_summary"]["via"] = iface.get_name()
                if (with_username
                        and self.alloc_type != IPADDRESS_TYPE.DISCOVERED):
                    # If a user owns this node, overwrite any username we found
                    # earlier. A node's owner takes precedence.
                    if node.owner and node.owner.username:
                        data["user"] = node.owner.username
            if len(self.dnsresource_set.all()) > 0:
                # This IP address is used as DNS resource.
                dns_records = [{
                    "id": resource.id,
                    "name": resource.name,
                    "domain": resource.domain.name,
                } for resource in self.dnsresource_set.all()]
                data["dns_records"] = dns_records
            if self.bmc_set.exists():
                # This IP address is used as a BMC.
                bmcs = [{
                    "id":
                    bmc.id,
                    "power_type":
                    bmc.power_type,
                    "nodes": [{
                        "system_id": node.system_id,
                        "hostname": node.hostname,
                    } for node in bmc.node_set.all()],
                } for bmc in self.bmc_set.all()]
                data["bmcs"] = bmcs
        return data

    def set_ip_address(self, ipaddr, iface=None):
        """Sets the IP address to the specified value, and also updates
        the subnet field.

        The new subnet is determined by calling get_best_subnet_for_ip() on
        the SubnetManager.

        If an interface is supplied, the Interface's VLAN is also updated
        to match the VLAN of the new Subnet.
        """
        self.ip = ipaddr

        # Cases we need to handle:
        # (0) IP address is being cleared out (remains within Subnet)
        # (1) IP address changes to another address within the same Subnet
        # (2) IP address changes to another address with a different Subnet
        # (3) IP address changes to an address within an unknown Subnet

        if not ipaddr:
            # (0) Nothing to be done. We're clearing out the IP address.
            return

        if self.ip and self.subnet:
            if self.get_ipaddress() in self.subnet.get_ipnetwork():
                # (1) Nothing to be done. Already in an appropriate Subnet.
                return
            else:
                # (2) and (3): the Subnet has changed (could be to None)
                subnet = Subnet.objects.get_best_subnet_for_ip(ipaddr)
                # We must save here, otherwise it's possible that we can't
                # traverse the interface_set many-to-many.
                self.save()
                self._set_subnet(subnet, interfaces=self.interface_set.all())
示例#33
0
class Calendar(Model):
    """A delivery calendar.

    A calendar is attached to one and only one zone. There are two types of
    calendars: default and exceptions. The default calendar (only one default
    calendar per zone might exist) does not specify a validity period, while
    exceptions do define validity period (which must be non overlapping for
    every single zone, i.e. a zone can't have two overlapping exceptions both
    valid at the same time).

    The exceptions, when they are valid, take precedence over the default
    calendar.

    The calendar also defines *slack days*, meaning that a shipping cannot be
    booked to a time that is before the time of the booking plus the slack
    days: e.g. if ``slack_days`` is equal to two I can't book a delivery today
    for tomorrow but I shall book a later one.
    """

    zone = ForeignKey(Zone, verbose_name=_(u"delivery zone"))
    valid_from = DateField(_(u"valid from"),
                           blank=True,
                           null=True,
                           default=None)
    valid_to = DateField(_(u"valid to"), blank=True, null=True, default=None)
    slack_days = IntegerField(_(u"slack days"),
                              validators=[MinValueValidator(0)])

    def clean(self):
        # Checks that either ends of the validity period are specified or none
        # (default calendar)
        if (self.valid_from is None and self.valid_to is not None) or \
                (self.valid_from is not None and self.valid_to is None):
            raise ValidationError(
                _(u"You must specify both ends of the validity period or "
                  u"none at all"))
        # If this is a default calendar (no validity period) checks that it is
        # the only one
        if self.valid_from is None:
            filter_ = Q(zone=self.zone,
                        valid_from__isnull=True,
                        valid_to__isnull=True)
            if self.pk is not None:
                filter_ &= ~Q(pk=self.pk)
            other_default = self.__class__.objects.all().filter(
                filter_).count()
            if other_default > 0:
                raise ValidationError(
                    _(u"You can specify only one default calendar (with no "
                      u"validity period) per zone"))
        else:
            # Checks that the validity period makes sense
            if self.valid_from > self.valid_to:
                raise ValidationError(
                    _(u"The validity period starts after it ends"))
            filter_ = Q(zone=self.zone)
            filter_ &= overlapping_query(self, 'valid_from', 'valid_to')
            if self.pk is not None:
                filter_ &= ~Q(pk=self.pk)
            # Checks that there aren't any overlapping definitions
            overlapping = self.__class__.objects.all().filter(filter_).count()
            if overlapping > 0:
                raise ValidationError(
                    _(u"There is another calendar present in the validity "
                      u"time of the current one"))

    def __unicode__(self):
        template = _(u"%(zone)s's calendar (%(from)s - %(to)s)")
        data = {'zone': unicode(self.zone)}
        if self.valid_from is None and self.valid_to is None:
            template = _(u"%(zone)s's default calendar")
        else:
            data['from'] = date_format(self.valid_from)
            data['to'] = date_format(self.valid_to)
        return template % data

    class Meta:
        verbose_name = _("calendar")
        verbose_name_plural = _("calendars")
        ordering = ['-valid_from']
示例#34
0
文件: ad.py 项目: yaldashbz/Yektanet
class Ad(Model):
    APPROVAL_CHOICES = (
        ('accepted', 'قبول'),
        ('denied', 'رد'),
    )

    advertiser = ForeignKey(to=Advertiser,
                            related_name='ads',
                            verbose_name='تبلیغ کننده',
                            on_delete=CASCADE)

    approve = CharField(max_length=10,
                        choices=APPROVAL_CHOICES,
                        verbose_name='وضعیت',
                        default='denied')

    title = CharField(max_length=100, verbose_name='موضوع')

    img_url = URLField(verbose_name=' ادرس عکس تبلیغ', )

    link = URLField(verbose_name='ادرس سایت شما')

    class Meta:
        verbose_name = 'تبلیغ'
        verbose_name_plural = 'تبلیغات'

    def __str__(self):
        return str(self.advertiser) + ' : ' + str(self.title)

    @staticmethod
    def get_total_ctr(start_time, end_time):
        return Ad.objects.annotate(
            total_views=Count(F('views'),
                              distinct=True,
                              filter=Q(views__time__range=(start_time,
                                                           end_time)))
        ).filter(total_views__gt=0).annotate(
            ctr=Cast(
                Count(F('clicks'),
                      distinct=True,
                      filter=Q(clicks__time__range=(
                          start_time, end_time))), FloatField()) /
            Cast(
                Count(F('views'),
                      distinct=True,
                      filter=Q(views__time__range=(start_time, end_time)),
                      output_field=FloatField()), FloatField())).order_by(
                          '-ctr')

    @staticmethod
    def get_total_clicks_views(start_time, end_time, delta):
        ads = Ad.objects.all()
        response = dict()
        for ad in ads:
            ad_response = list()
            start = start_time
            while start < end_time:
                end = start + timezone.timedelta(hours=delta)
                d = ad.get_dict_in_time_range(start_time=start, end_time=end)
                ad_response.append(d)

                start = end

            response.update({ad: ad_response})

        return response

    def get_dict_in_time_range(self, start_time, end_time):
        clicks_count = self.clicks.filter(time__range=(start_time,
                                                       end_time)).count()

        views_count = self.views.filter(time__range=(start_time,
                                                     end_time)).count()

        d = dict()
        d.update({
            'start_time': start_time,
            'end_time': end_time,
            'total_clicks': clicks_count,
            'total_view': views_count,
        })
        return d

    def get_closest_view(self, ip, time):
        return self.views.filter(ip=ip, time__lt=time).order_by('-time')[0]
示例#35
0
class Mission(Model):
    """A delivery mission.

    A delivery mission starts at a given time, on a given day, and visits the
    zone it is attached via calendar. It phisically corresponds to the delivery
    truck arriving in the zone the given day (e.g. "Tuesday") and staying there
    from ``starts`` to ``ends`` (e.g. from 08:00 to 12:00) to make the
    deliveries.

    All the associated shipments addresses will be visited in that timespan,
    according to the most comfortable route for the driver (there is no
    specific delivery hour but it can be anything between the given time
    period.

    It also defines a maximum number of shipments for the mission (e.g. the
    number of actual deliveries the driver can perform in the allowed
    time). This is later used in scheduling.
    """

    calendar_day = ForeignKey(CalendarDay, verbose_name=_(u"calendar day"))
    starts = TimeField(_(u"starts at"))
    ends = TimeField(_(u"ends at"))
    shipments = IntegerField(_(u"maximum shipments"),
                             validators=[MinValueValidator(0)])

    def clean(self):
        # Checks the delivery period makes sense
        if self.starts > self.ends:
            raise ValidationError(_(u"The mission starts after it ends"))
        # We cannot have overlapping missions: there is no concept of
        # concurrent deliveries by multiple trucks
        filter_ = Q(calendar_day=self.calendar_day)
        filter_ &= overlapping_query(self, 'starts', 'ends')
        if self.pk is not None:
            filter_ &= ~Q(pk=self.pk)
        overlapping = self.__class__.objects.all().filter(filter_).count()
        if overlapping > 0:
            raise ValidationError(
                _(u"There is another mission to the same zone with a "
                  u"conflicting schedule"))

    def remaining_shipments(self, date):
        """Returns the remaining shipments for a given day.

        Calculates how many "free delivery slots" there are for a given mission
        on a given day (e.g. "Tue Dec 20th, 2011"), by looking at the booked
        shipments for that day and subtracting those from the maximum number of
        possible shipments for that mission
        """
        shippings_that_day = Shipment.objects.all().filter(mission=self,
                                                           date=date).count()
        return self.shipments - shippings_that_day

    def __unicode__(self):
        return _(u"%(start)s - %(end)s, %(day)s") % {
            'day': unicode(self.calendar_day),
            'start': time_format(self.starts),
            'end': time_format(self.ends)
        }

    class Meta:
        verbose_name = _("mission")
        verbose_name_plural = _("missions")
        ordering = ['starts']
示例#36
0
class Pupitre(CommonModel):
    oeuvre = ForeignKey('Oeuvre',
                        related_name='pupitres',
                        verbose_name=_('œuvre'),
                        on_delete=CASCADE)
    partie = ForeignKey('Partie',
                        related_name='pupitres',
                        verbose_name=_('rôle ou instrument'),
                        on_delete=PROTECT)
    soliste = BooleanField(_('soliste'), default=False, db_index=True)
    quantite_min = IntegerField(_('quantité minimale'), default=1)
    quantite_max = IntegerField(_('quantité maximale'), default=1)
    facultatif = BooleanField(
        _('ad libitum'),
        default=False,
    )

    objects = PupitreManager()

    class Meta(object):
        verbose_name = _('pupitre')
        verbose_name_plural = _('pupitres')
        ordering = ('-soliste', 'partie')

    @staticmethod
    def invalidated_relations_when_saved(all_relations=False):
        return ('oeuvre', )

    def __str__(self):
        n_min = self.quantite_min
        n_max = self.quantite_max
        partie = self.partie.html(pluriel=n_max > 1, oeuvre=False, tags=False)
        if n_min != n_max:
            out = ugettext('%s à %s %s') % (apnumber(n_min), apnumber(n_max),
                                            partie)
        elif n_min > 1:
            out = f'{apnumber(n_min)} {partie}'
        else:
            out = partie
        if self.facultatif:
            out = format_html('{} <em>ad libitum</em>', out)
        return out

    def get_absolute_url(self):
        return self.partie.get_absolute_url()

    def html(self, tags=True):
        return href(self.get_absolute_url(), force_text(self), tags=tags)

    def related_label(self):
        out = force_text(self)
        if self.partie.oeuvre is not None:
            out += f' ({self.partie.oeuvre})'
        return out

    @staticmethod
    def autocomplete_search_fields():
        return (
            'partie__nom__unaccent__icontains',
            'partie__nom_pluriel__unaccent__icontains',
            'partie__professions__nom__unaccent__icontains',
            'partie__professions__nom_pluriel__unaccent__icontains',
        )
示例#37
0
class Zone(Model):
    """A delivery zone.

    The city is divided into multiple zones, and delivery scheduling takes the
    zone as the atomic delivery destination used for semantical grouping of
    deliveries.
    """

    site = ForeignKey(Site, verbose_name=_(u"site"))
    name = CharField(_(u"zone name"), max_length=256)
    active = BooleanField(_(u"active"), default=False)

    def default_calendar(self):
        try:
            return self.calendar_set.get(valid_from__isnull=True,
                                         valid_to__isnull=True)
        except Calendar.DoesNotExist:
            pass
        return None

    def check_validity(self):
        """Checks the "validity" of the zone.

        For a zone, being valid means that:
         * The default calendar exists
         * The default calendar has (at least) one day associated with it and
           that this contains (at least) one mission

        Should one of the two fail, ``ValidationError`` is raised.
        """
        default_calendar = self.default_calendar()
        # Check that we have a default calendar
        if default_calendar is None:
            raise ValidationError(
                _(u"%(zone)s doesn't have a default calendar associated, "
                  u"please add it") % {'zone': self.name})
        # Checks that we have atleast one mission associated with one of the
        # days
        missions = Mission.objects.all().filter(
            calendar_day__calendar=default_calendar).count()
        if not (missions > 0):
            raise ValidationError(
                _(u"%(zone)s's default calendar is void, please add at least "
                  u"one mission to it") % {'zone': self.name})

    def validate(self):
        """If the zone is active, checks that it is still valid.

        Uses ``check_validity`` to check that the zone is still valid: if it
        isn't, the ``active`` property is set to false and the zone is saved.

        Returns the state of ``active`` after the check
        """
        if not self.active:
            return self.active
        try:
            self.check_validity()
        except ValidationError:
            self.active = False
            self.save()
        return self.active

    def activate(self):
        """Activates the zone.

        It uses ``check_validity`` beforehand to check is activation is indeed
        possible.
        """
        self.check_validity()
        self.active = True
        self.save()

    def deactivate(self):
        self.active = False
        self.save()

    def __unicode__(self):
        return self.name

    class Meta:
        verbose_name = _("zone")
        verbose_name_plural = _("zones")
        ordering = ['name']
示例#38
0
class ForumBoard(Model):
    section = ForeignKey(ForumSection,
                         on_delete=PROTECT,
                         null=False,
                         related_name='boards')
    title = CharField(max_length=128, null=False, blank=False)
    description = TextField(null=False)
    read_perm = ForeignKey(Permission,
                           on_delete=PROTECT,
                           null=True,
                           related_name='readable_boards')
    write_perm = ForeignKey(Permission,
                            on_delete=PROTECT,
                            null=True,
                            related_name='writable_boards')
    sort_index = IntegerField(default=0, null=False)
    deleted = BooleanField(default=False, null=False)

    def __str__(self) -> str:
        return self.title

    def can_read(self, user: User) -> bool:
        if self.read_perm is None:
            return True
        return has_perm_obj(user, self.read_perm)

    def can_write(self, user: User) -> bool:
        if not user.is_authenticated:
            return False
        if self.write_perm is None:
            return True
        return has_perm_obj(user, self.write_perm)

    def visible_threads(self, user: User = None) -> QuerySet:
        qs = self.threads.filter(deleted=False)\
            .select_related('user', 'user__profile')\
            .order_by('-sticky', '-modified_at')

        # Post count for the threads
        post_count_sq = ForumPost.objects\
            .filter(thread=OuterRef('pk'), deleted=False).values('pk')
        qs = qs.annotate(total_posts=SQCount(post_count_sq))

        # Latest post ID for the threads
        latest_post_sq = ForumPost.objects.filter(
            thread=OuterRef('pk'),
            deleted=False).order_by('-id').values('pk')[:1]
        qs = qs.annotate(latest_post_id=Subquery(latest_post_sq))

        # Find out if threads have new content since last visit
        if user and user.is_authenticated:
            limit_ts = user.profile.last_all_read
            reads_sq = ForumLastRead.objects\
                .filter(user=user, thread=OuterRef('pk'), created_at__gt=OuterRef('modified_at'))\
                .values('thread')
            threads_sq = ForumThread.objects\
                .filter(pk=OuterRef('pk'), deleted=False, modified_at__gt=limit_ts)\
                .exclude(pk__in=Subquery(reads_sq))\
                .values('pk')
            qs = qs.annotate(new_posts_count=SQCount(threads_sq))

        return qs

    def get_latest_posts(self, ids: typing.List[int]) -> dict:
        sq = ForumPost.objects.filter(thread__board=self.pk,
                                      deleted=False).values('pk')
        qs = ForumPost.objects.filter(pk__in=ids)\
            .select_related('user', 'user__profile', 'thread')\
            .annotate(post_count=SQCount(sq))
        return {x.id: x for x in qs.all()}

    class Meta:
        app_label = 'forum'
        indexes = [
            Index(fields=['section', 'sort_index', 'deleted']),
            Index(fields=['deleted']),
        ]
示例#39
0
class Filesystem(CleanSave, TimestampedModel):
    """A filesystem on partition or a block device.

    :ivar uuid: UUID of the filesystem.
    :ivar fstype: Type of filesystem. This can even be filesystems that
        cannot be mounted directly, e.g. LVM.
    :ivar partition: `Partition` this filesystem is on. If empty the filesystem
        must be directly on a `BlockDevice`.
    :ivar block_device: `BlockDevice` this filesystem is on. If empty the
        filesystem must be on a `Partition`.
    :ivar filesystem_group: `FilesystemGroup` this filesystem belongs to.
    :ivar create_params: Parameters that can be passed during the `mkfs`
        command when the filesystem is created.
    :ivar mount_point: Path to where this filesystem is mounted on the deployed
        operating system.
    :ivar mount_options: Parameters that are used to mount this filesystem
        on the deployed operating system.
    """

    # All filesystem types.
    TYPES = frozenset(fstype for fstype, _ in FILESYSTEM_TYPE_CHOICES)

    # Filesystem types that expect to be mounted into the host's filesystem.
    # Essentially this means all filesystems except swap.
    TYPES_REQUIRING_MOUNT_POINT = frozenset(
        fstype for fstype, _ in FILESYSTEM_TYPE_CHOICES
        if fstype != FILESYSTEM_TYPE.SWAP)

    # Filesystem types that require storage on a block special device, i.e. a
    # block device or partition.
    TYPES_REQUIRING_STORAGE = frozenset(
        fstype for fstype, _ in FILESYSTEM_TYPE_CHOICES
        if fstype != FILESYSTEM_TYPE.RAMFS and fstype != FILESYSTEM_TYPE.TMPFS)

    class Meta(DefaultMeta):
        """Needed for South to recognize this model."""

        unique_together = (
            ("partition", "acquired"),
            ("block_device", "acquired"),
        )

    objects = FilesystemManager()

    uuid = CharField(max_length=36,
                     unique=False,
                     null=False,
                     blank=False,
                     editable=False)

    fstype = CharField(
        max_length=20,
        choices=FILESYSTEM_TYPE_CHOICES,
        default=FILESYSTEM_TYPE.EXT4,
    )

    partition = ForeignKey(Partition,
                           unique=False,
                           null=True,
                           blank=True,
                           on_delete=CASCADE)

    block_device = ForeignKey(BlockDevice,
                              unique=False,
                              null=True,
                              blank=True,
                              on_delete=CASCADE)

    node = ForeignKey(
        "Node",
        unique=False,
        null=True,
        blank=True,
        related_name="special_filesystems",
        on_delete=CASCADE,
    )

    # XXX: For CharField, why allow null *and* blank? Would
    # CharField(null=False, blank=True, default="") not work better?
    label = CharField(max_length=255, null=True, blank=True)

    filesystem_group = ForeignKey(
        FilesystemGroup,
        null=True,
        blank=True,
        related_name="filesystems",
        on_delete=CASCADE,
    )

    # XXX: For CharField, why allow null *and* blank? Would
    # CharField(null=False, blank=True, default="") not work better?
    create_params = CharField(max_length=255, null=True, blank=True)

    # XXX: For CharField, why allow null *and* blank? Would
    # CharField(null=False, blank=True, default="") not work better?
    mount_point = CharField(max_length=255, null=True, blank=True)

    # XXX: For CharField, why allow null *and* blank? Would
    # CharField(null=False, blank=True, default="") not work better?
    mount_options = CharField(max_length=255, null=True, blank=True)

    cache_set = ForeignKey(
        CacheSet,
        null=True,
        blank=True,
        related_name="filesystems",
        on_delete=CASCADE,
    )

    # When a node is allocated all Filesystem objects assigned to that node
    # with mountable filesystems will be duplicated with this field set to
    # True. This allows a standard user to change this object as they want
    # and format other free devices. Once the node is released these objects
    # will be deleted.
    acquired = BooleanField(default=False)

    def get_node(self):
        """`Node` this filesystem belongs to."""
        if self.partition is not None:
            return self.partition.get_node()
        elif self.block_device is not None:
            return self.block_device.node
        elif self.node is not None:
            return self.node
        else:
            # XXX: Explode instead?
            return None

    def get_physical_block_devices(self):
        """Return PhysicalBlockDevices backing the filesystem."""
        from maasserver.models.virtualblockdevice import VirtualBlockDevice

        devices = []
        parent = self.get_parent()
        if isinstance(parent, PhysicalBlockDevice):
            devices.append(parent)
        elif isinstance(parent, VirtualBlockDevice):
            for grandparent in parent.get_parents():
                if isinstance(grandparent, Partition):
                    grandparent = grandparent.partition_table.block_device
                device = grandparent.actual_instance
                if isinstance(device, PhysicalBlockDevice):
                    devices.append(device)
        return devices

    def get_size(self):
        """Size of filesystem."""
        if self.partition is not None:
            return self.partition.size
        elif self.block_device is not None:
            return self.block_device.size
        else:
            # XXX: Return None instead?
            return 0

    def get_block_size(self):
        """Block size of partition table."""
        if self.partition is not None:
            return self.partition.get_block_size()
        elif self.block_device is not None:
            return self.block_device.block_size
        else:
            # XXX: Return None instead?
            return 0

    def get_parent(self):
        """Return linked `BlockDevice` or linked `Partition`."""
        if self.partition is not None:
            return self.partition
        elif self.block_device is not None:
            return self.block_device.actual_instance
        elif self.node is not None:
            return self.node
        else:
            # XXX: Explode instead?
            return None

    @property
    def is_mountable(self):
        """Return True if this is a mountable filesystem."""
        return self.fstype in FILESYSTEM_FORMAT_TYPE_CHOICES_DICT

    @property
    def is_mounted(self):
        """Return True if this filesystem is mounted."""
        return self.mount_point is not None

    @property
    def uses_mount_point(self):
        """True if this filesystem can be mounted on a path.

        Swap partitions, for example, are not mounted at a particular point in
        the host's filesystem.
        """
        return self.fstype in self.TYPES_REQUIRING_MOUNT_POINT

    @property
    def uses_storage(self):
        """True if this filesystem expects a block special device.

        ramfs and tmpfs, for example, exist only in memory.
        """
        return self.fstype in self.TYPES_REQUIRING_STORAGE

    def clean(self, *args, **kwargs):
        super().clean(*args, **kwargs)
        parents = self.partition, self.block_device, self.node

        # You have to specify either a partition, block device, or node.
        if parents.count(None) == len(parents):
            if self.uses_storage:
                raise ValidationError(
                    "One of partition or block device must be specified.")
            else:
                raise ValidationError("A node must be specified.")

        # You can have only one of partition, block device, or node.
        if len(parents) - parents.count(None) > 1:
            raise ValidationError(
                "Only one of partition, block device, or node can "
                "be specified.")

        # If fstype is for a bcache as a cache device it needs to be in a
        # cache_set.
        if (self.fstype == FILESYSTEM_TYPE.BCACHE_CACHE
                and self.cache_set is None):
            raise ValidationError(
                # XXX: Message leaks implementation details ("BCACHE_CACHE",
                # "cache_set").
                "BCACHE_CACHE must be inside of a cache_set.")

        # Normalise the mount point to None or "none" if this filesystem does
        # not use it. The mount point (fs_file) field in fstab(5) is ignored
        # for filesystems that don't have a mount point (i.e. swap) and "none"
        # should be used, so it's used here too. When the mount point is set
        # to None (rather than the string "none") it means that the filesystem
        # is unmounted. This overloading is going to catch us out one day.
        if not self.uses_mount_point:
            if self.mount_point is not None:
                self.mount_point = "none"

        # You cannot place a filesystem directly on the boot_disk. It requires
        # a partition to be used.
        if self.block_device is not None:
            node = self.block_device.node
            boot_disk = node.get_boot_disk()
            if boot_disk is not None and boot_disk.id == self.block_device.id:
                # This is the boot disk for the node.
                raise ValidationError(
                    "Cannot place filesystem directly on the boot disk. "
                    "Create a partition on the boot disk first and then "
                    "format the partition.")

        # Only ramfs and tmpfs can have a node as a parent.
        if self.uses_storage:
            if self.node is not None:
                raise ValidationError("A %s filesystem must be placed on a "
                                      "block device or partition." %
                                      self.fstype)
        else:
            if self.node is None:
                raise ValidationError(
                    "RAM-backed filesystems cannot be placed on "
                    "block devices or partitions.")

        # Non-storage filesystems MUST be mounted.
        if (not self.uses_storage) and (not self.is_mounted):
            raise ValidationError("RAM-backed filesystems must be mounted.")

        # There should be no duplicate mount points.
        if self.is_mounted and self.uses_mount_point:
            # Find another filesystem that's mounted at the same point.
            owning_node_other_matching_mount_point = (
                Filesystem.objects.filter_by_node(self.get_node()).filter(
                    mount_point=self.mount_point,
                    acquired=self.acquired).exclude(id=self.id))
            if owning_node_other_matching_mount_point.exists():
                raise ValidationError(
                    "Another filesystem is already mounted at %s." %
                    (self.mount_point, ))

    def save(self, *args, **kwargs):
        if not self.uuid:
            self.uuid = uuid4()
        super().save(*args, **kwargs)
示例#40
0
class InstanceOptions(AwsOptions):
    auto_created = False
    app_label = 'aws_duck'
    model_name = 'instance'
    verbose_name = 'EC2 instance'
    verbose_name_raw = 'EC2 instance'
    verbose_name_plural = 'EC2 instances'
    object_name = 'instance'
    default_related_name = None

    _aws_pk_field = 'id'
    _aws_fields = {
        'id': AwsAutoField(),
        'ami_launch_index': CharField(max_length=200, editable=False),
        'architecture': CharField(max_length=200, editable=False),
        'block_device_mappings': CharField(max_length=200, editable=False),
        'client_token': CharField(max_length=200, editable=False),
        'ebs_optimized': CharField(max_length=200, editable=False),
        'hypervisor': CharField(max_length=200, editable=False),
        'iam_instance_profile': CharField(max_length=200, editable=False),
        'image_id': CharField(max_length=200, editable=False),
        'instance_id': CharField(max_length=200, editable=False),
        'instance_lifecycle': CharField(max_length=200, editable=False),
        'instance_type': CharField(max_length=200, editable=False),
        'kernel_id': CharField(max_length=200, editable=False),
        'key_name': CharField(max_length=200, editable=False),
        'launch_time': CharField(max_length=200, editable=False),
        'monitoring': CharField(max_length=200, editable=False),
        'network_interfaces': CharField(max_length=200, editable=False),
        'placement': CharField(max_length=200, editable=False),
        'platform': CharField(max_length=200, editable=False),
        'private_dns_name': CharField(max_length=200, editable=False),
        'private_ip_address': CharField(max_length=200, editable=False),
        'product_codes': CharField(max_length=200, editable=False),
        'public_dns_name': CharField(verbose_name='public DNS name',
                                     max_length=200,
                                     editable=False),
        'public_ip_address': CharField(verbose_name='public IP address',
                                       max_length=200, editable=False),
        'ramdisk_id': CharField(max_length=200, editable=False),
        'root_device_name': CharField(max_length=200, editable=False),
        'root_device_type': CharField(max_length=200, editable=False),
        'security_groups': CharField(max_length=200, editable=False),
        'source_dest_check': CharField(max_length=200, editable=False),
        'spot_instance_request_id': CharField(max_length=200, editable=False),
        'sriov_net_support': CharField(max_length=200, editable=False),
        'state': CharField(max_length=200, editable=False),
        'state_reason': CharField(max_length=200, editable=False),
        'state_transition_reason': CharField(max_length=200, editable=False),
        'subnet_id': CharField(max_length=200, editable=False),
        'tags': CharField(max_length=200, editable=False),
        'virtualization_type': CharField(max_length=200, editable=False),
        'vpc_id': CharField(max_length=200, editable=False),
    }

    def _bind(self):
        super()._bind()

        from .models import Image, Instance
        self.thread = ForeignKey(Image)
        self.thread.contribute_to_class(Image, 'ami')
        self.concrete_model = Instance
        self._aws_other_fields['thread'] = self.thread
 def __init__(self, **kwargs):
     kwargs.setdefault('to', get_user_model())
     kwargs.setdefault('null', True)
     kwargs.setdefault('blank', True)
     ForeignKey.__init__(self, **kwargs)