Exemplo n.º 1
0
    def __init__(self, target: models.Field):
        default = self.NO_DEFAULT
        if target.has_default():
            if isinstance(target.get_default(), Enum):
                default = target.get_default().value
            else:
                default = target.get_default()

        choices = None
        if target.choices:
            choices = []
            for value, label in target.choices:
                choices.append(label)

        super().__init__(name=target.name,
                         type=self.define_representation_type(target),
                         description=target.help_text,
                         default=default,
                         is_required=self.check_is_required(target),
                         choices=choices)
        if self.type is Attribute.TYPE.OBJECT:
            if isinstance(target, (models.OneToOneField, models.ForeignKey)):
                self.type_of = target.related_model
            else:
                raise NotImplementedError()
        if self.type is Attribute.TYPE.ARRAY:
            self.type_of = target.related_model
        if self.type is Attribute.TYPE.FILE:
            self.type = Attribute.TYPE.STRING
        self.target = target
Exemplo n.º 2
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    def _handle_o2m_related_field(self, related_field: Field, alias_object: Model):
        try:
            reverse_o2m_accessor_name = related_field.get_accessor_name()
        except AttributeError:
            # get_accessor_name does not exist for <django.contrib.contenttypes.fields.GenericRelation>
            reverse_o2m_accessor_name = related_field.get_attname()

        try:
            o2m_accessor_name = related_field.field.name
        except AttributeError:
            o2m_accessor_name = related_field.name

        for obj in getattr(alias_object, reverse_o2m_accessor_name).all():
            try:
                logger.debug(f'Attempting to set o2m field {o2m_accessor_name} on '
                             f'{obj._meta.model.__name__}[pk={obj.pk}] to '
                             f'{self.model_meta.model_name}[pk={self.primary_object.pk}] ...')
                setattr(obj, o2m_accessor_name, self.primary_object)
                obj.validate_unique()
                obj.save()
                logger.debug('success.')
            except ValidationError as e:
                logger.debug(f'failed. {e}')
                if related_field.field.null:
                    logger.debug(f'Setting o2m field {o2m_accessor_name} on '
                                 f'{obj._meta.model.__name__}[pk={obj.pk}] to `None`')
                    setattr(obj, o2m_accessor_name, None)
                    obj.save()
                else:
                    logger.debug(f'Deleting {obj._meta.model.__name__}[pk={obj.pk}]')
                    obj.delete()
            self.modified_related_objects.append(obj)
Exemplo n.º 3
0
    def column_sql(self,
                   model: Model,
                   field: Field,
                   include_default=False) -> Tuple[str, list]:
        # Get the column's type and use that as the basis of the SQL
        db_params = field.db_parameters(connection=self.connection)
        sql = db_params['type']
        params = []

        # Check for fields that aren't actually columns (e.g. M2M)
        if sql is None:
            return None, None

        if field.null and not self.connection.features.implied_column_null:
            sql += ' NULL'

        # Check constraints
        if not field.null:
            check = '%s IS NOT NULL' % self.quote_name(field.column)
            self.deferred_column_sql['CHECK'].append(
                self._create_check_sql_for_field(model,
                                                 field,
                                                 check,
                                                 qualifier='_nn'))

        db_params = field.db_parameters(connection=self.connection)
        if db_params['check']:
            self.deferred_column_sql['CHECK'].append(
                self._create_check_sql_for_field(model, field,
                                                 db_params['check']))

        # Primary/unique keys
        if field.primary_key:
            self.deferred_column_sql['PRIMARY_KEY'].append(
                self._create_primary_key_sql(model, field))
        elif field.unique:
            self.deferred_column_sql['UNIQUE'].append(
                self._create_unique_sql(model, [field.column]))

        # FK
        if field.remote_field and field.db_constraint:
            self.deferred_column_sql['FOREIGN_KEY'].append(
                self._create_fk_sql(model,
                                    field,
                                    suffix='_fk_%(to_table)s_%(to_column)s'))

        # Autoincrement SQL (for backends with post table definition variant)
        if field.get_internal_type() in ('AutoField', 'BigAutoField'):
            autoinc_sql = self.connection.ops.autoinc_sql(
                model._meta.db_table, field.column)
            if autoinc_sql:
                self.deferred_column_sql['AUTOINCREMENT'].extend(autoinc_sql)

        # Comment columns for fields with help_text
        if field.help_text:
            self.deferred_column_sql['COMMENT'].append(
                self._create_comment_sql(model, field))

        return sql, params
Exemplo n.º 4
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 def __init__(self, *args, **kwargs):
     if kwargs.get("auto_now", False):
         self.auto_now = True
         kwargs.pop("auto_now")
     if kwargs.get("auto_now_add", False):
         self.auto_now_add = True
         kwargs.pop("auto_now_add")
     Field.__init__(self, *args, **kwargs)
Exemplo n.º 5
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 def __init__(self, *args, **kwargs):
     kwargs['blank'] = True
     if 'default' not in kwargs:
         kwargs['default'] = []
     if 'type' in kwargs:
         self._internaltype = kwargs.pop("type")
         
     Field.__init__(self, *args, **kwargs)
Exemplo n.º 6
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def ensure_field(model, name: str, field: Field):
    try:
        existing_field = model._meta.get_field(name)
    except FieldDoesNotExist:
        field.contribute_to_class(model, name)
    else:
        if not isinstance(existing_field, field.__class__):
            msg = ('{model} requires a field with name {name} of type {type}.'.
                   format(model=model,
                          name=name,
                          type=field.__class__.__name__))
            raise TypeError(msg)
    return field
Exemplo n.º 7
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    def get_field_meta(self, field: models.Field) -> OrderedDict:
        # check if we need to override default get_field_meta behaviour
        get_field_meta = getattr(self, 'get_%s_field_meta' % field.name, None)
        if callable(get_field_meta):
            return get_field_meta(field, self.obj)

        sentinel = object()
        d = OrderedDict()

        for attr in self.attr_list:
            val = getattr(field, attr, sentinel)
            if val is sentinel:
                continue
            if attr in ['max_length']:
                if val is None:
                    continue

            if attr in ['verbose_name']:
                val = force_text(val)

            d[attr] = val

        d['type'] = field.get_internal_type()
        d['required'] = self.is_required(field)
        if field.default != models.NOT_PROVIDED:
            if callable(field.default):
                d['default'] = field.default()
            else:
                d['default'] = field.default
        if hasattr(field, 'choices') and field.choices:
            d['choices'] = list(self.format_choices(field))

        if field.related_model:
            if field.name not in self.no_data:
                user_url_getter = getattr(self, 'get_%s_dataset_url' % field.name.lower(), None)
                if callable(user_url_getter):
                    d['data'] = user_url_getter(field, self.obj)
                elif field.name in self.dataset_urls:
                    d['data'] = force_text(self.dataset_urls[field.name])
                else:
                    d['data'] = self.get_field_related_data(field)

        data_update = self.update_fields.get(field.name, {})
        d.update(data_update)

        # check if we need to perform runtime update
        update_field_meta_callback = getattr(self, 'update_%s_field_meta' % field.name, None)
        if callable(update_field_meta_callback):
            d.update(update_field_meta_callback(field, self.obj))

        return d
Exemplo n.º 8
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    def _handle_m2m_related_field(self, related_field: Field, alias_object: Model):
        try:
            m2m_accessor_name = related_field.get_attname()
        except AttributeError:
            # get_attname does not exist for reverse m2m relations
            m2m_accessor_name = related_field.get_accessor_name()

        for obj in getattr(alias_object, m2m_accessor_name).all():
            logger.debug(f'Removing {obj._meta.model.__name__}[pk={obj.pk}] '
                         f'from {self.model_meta.model_name}[pk={alias_object.pk}].{m2m_accessor_name}')
            getattr(alias_object, m2m_accessor_name).remove(obj)
            logger.debug(f'Adding {obj._meta.model.__name__}[pk={obj.pk}] '
                         f'to {self.model_meta.model_name}[pk={self.primary_object.pk}].{m2m_accessor_name}')
            getattr(self.primary_object, m2m_accessor_name).add(obj)
            self.modified_related_objects.append(obj)
Exemplo n.º 9
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    def _field_type_declarations(self, field: models.Field):
        type_declarations = list()
        # If the field is relational, check that it is in the `model_pool`, and that
        # it has not already been "visited" (to prevent an infinite cycle).
        if isinstance(
                field,
            (models.ForeignKey, models.OneToOneField, models.ManyToOneRel)):
            if (field.related_model
                    in self.model_pool) and (field.related_model
                                             not in self.visited_models):
                child_queryset_lookups = QuerysetLookups(
                    model=field.related_model,
                    model_pool=self.model_pool,
                    prefixes=self.prefixes + [field.name],
                    visited_models=self.visited_models + [self.model])
                type_declarations += child_queryset_lookups.type_declarations()
        if not isinstance(field, models.ManyToOneRel):
            # This is the base lookup for the field.
            type_declarations.append(
                self._lookup_key([field.name]) + "? : " +
                self._lookup_type(field, None))

            for lookup_str, lookup_cls in field.get_lookups().items():
                type_declarations.append(
                    self._lookup_key([field.name, lookup_str]) + "? : " +
                    self._lookup_type(field, lookup_cls))
        return type_declarations
Exemplo n.º 10
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def CountIf(field, expression, **extra):
    return Count(
        Case(
            When(expression, then=F(field), **extra),
            default=None,
            output_field=Field(),
        ))
Exemplo n.º 11
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    def _handle_o2m_related_field(self, related_field: Field,
                                  alias_object: Model):
        reverse_o2m_accessor_name = related_field.get_accessor_name()
        o2m_accessor_name = related_field.field.name

        for obj in getattr(alias_object, reverse_o2m_accessor_name).all():
            try:
                logger.debug(
                    f'Attempting to set o2m field {o2m_accessor_name} on '
                    f'{obj._meta.model.__name__}[pk={obj.pk}] to '
                    f'{self.model_meta.model_name}[pk={self.primary_object.pk}] ...'
                )
                setattr(obj, o2m_accessor_name, self.primary_object)
                obj.validate_unique()
                obj.save()
                logger.debug('success.')
            except ValidationError as e:
                logger.debug(f'failed. {e}')
                if related_field.field.null:
                    logger.debug(
                        f'Setting o2m field {o2m_accessor_name} on '
                        f'{obj._meta.model.__name__}[pk={obj.pk}] to `None`')
                    setattr(obj, o2m_accessor_name, None)
                    obj.save()
                else:
                    logger.debug(
                        f'Deleting {obj._meta.model.__name__}[pk={obj.pk}]')
                    _pk = obj.pk
                    obj.delete()
                    obj.pk = _pk  # pk is cached and re-assigned to keep the audit trail in tact
            self.modified_related_objects.append(obj)
Exemplo n.º 12
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    def pre_save(self, model_instance, add):

        if not self.upload_to or (not callable(self.upload_to)
                                  and self.upload_to != self.chunks_upload_to):
            # this condition is verified whether "upload_to" has not been set in the
            # definition of field, or it has been set to the same location of the
            # chunks folder.
            # In those cases, we save some (useless) I/O operations
            # (i.e. deleting, and re-creating the same file twice), and
            # so the default FileField behaviour will be used/returned.
            return super(ResumableFileField,
                         self).pre_save(model_instance, add)

        # if here, upload_to has been set to a different location
        # from the chunks_upload_to
        file = Field.pre_save(self, model_instance, add)
        if file and (not file._committed
                     or self.chunks_upload_to in file.name):
            # Commit the file to storage prior to saving the model
            fpath = file.name.replace(settings.MEDIA_URL,
                                      self._safe_media_root())
            basename = path.basename(fpath)
            name = self.generate_filename(model_instance, basename)
            new_fpath = file.storage.get_available_name(
                path.join(self.storage.location, name),
                max_length=self.max_length)
            basefolder = path.dirname(new_fpath)
            if not file.storage.exists(basefolder):
                makedirs(basefolder)
            file_move_safe(fpath, new_fpath)
            setattr(model_instance, self.name, name)
            file._committed = True
            file.name = name
        return file
Exemplo n.º 13
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    def generate_value(self, field: Field, commit: bool = True) -> Any:
        """Call the associated generator with a field passing all required args.

        Generator Resolution Precedence Order:
        -- `field.default` - model field default value, unless explicitly overwritten during baking
        -- `attr_mapping` - mapping per attribute name
        -- `choices` -- mapping from available field choices
        -- `type_mapping` - mapping from user defined type associated generators
        -- `default_mapping` - mapping from pre-defined type associated
           generators

        `attr_mapping` and `type_mapping` can be defined easily overwriting the
        model.
        """
        is_content_type_fk = isinstance(field, ForeignKey) and issubclass(
            self._remote_field(field).model, contenttypes.models.ContentType)
        # we only use default unless the field is overwritten in `self.rel_fields`
        if field.has_default() and field.name not in self.rel_fields:
            if callable(field.default):
                return field.default()
            return field.default
        elif field.name in self.attr_mapping:
            generator = self.attr_mapping[field.name]
        elif getattr(field, "choices"):
            generator = random_gen.gen_from_choices(field.choices)
        elif is_content_type_fk:
            generator = self.type_mapping[contenttypes.models.ContentType]
        elif generators.get(field.__class__):
            generator = generators.get(field.__class__)
        elif field.__class__ in self.type_mapping:
            generator = self.type_mapping[field.__class__]
        else:
            raise TypeError("%s is not supported by baker." % field.__class__)

        # attributes like max_length, decimal_places are taken into account when
        # generating the value.
        field._using = self._using
        generator_attrs = get_required_values(generator, field)

        if field.name in self.rel_fields:
            generator_attrs.update(
                filter_rel_attrs(field.name, **self.rel_attrs))

        if not commit:
            generator = getattr(generator, "prepare", generator)

        return generator(**generator_attrs)
Exemplo n.º 14
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def clone_field_without_related_name(field: models.Field, ) -> models.Field:
    """Creates a clone of the given field, without a related_name."""

    if isinstance(field, models.fields.related.RelatedField):

        # ugly hack to prevent "models not ready" error
        if field.swappable:
            field = copy(field)
            field.swappable = False

        _name, _path, args, kwargs = field.deconstruct()
        kwargs.pop('related_name', None)

        return type(field)(*args, **kwargs)

    else:
        return field.clone()
Exemplo n.º 15
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    def _skip_field(self, field: Field) -> bool:
        from django.contrib.contenttypes.fields import GenericRelation

        # check for fill optional argument
        if isinstance(self.fill_in_optional, bool):
            field.fill_optional = self.fill_in_optional
        else:
            field.fill_optional = field.name in self.fill_in_optional

        if isinstance(field, FileField) and not self.create_files:
            return True

        # Don't Skip related _id fields defined in the iterator attributes
        if ((isinstance(field, OneToOneField) or isinstance(field, ForeignKey))
                and hasattr(field, "attname")
                and field.attname in self.iterator_attrs):
            return False

        # Skip links to parent so parent is not created twice.
        if isinstance(field,
                      OneToOneField) and self._remote_field(field).parent_link:
            return True

        if isinstance(field, (AutoField, GenericRelation, OrderWrt)):
            return True

        if all([
                field.name not in self.model_attrs,
                field.name not in self.rel_fields,
                field.name not in self.attr_mapping,
        ]):
            # Django is quirky in that BooleanFields are always "blank",
            # but have no default.
            if not field.fill_optional and (
                    not issubclass(field.__class__, Field)
                    or field.has_default() or
                (field.blank and not isinstance(field, BooleanField))):
                return True

        if field.name not in self.model_attrs:
            if field.name not in self.rel_fields and (field.null and
                                                      not field.fill_optional):
                return True

        return False
Exemplo n.º 16
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 def formfield(self, **kwargs):
     defaults = {'form_class': forms.CharField}
     defaults.update(kwargs)
     if defaults.get('widget') == admin_widgets.AdminIntegerFieldWidget:
         defaults['widget'] = admin_widgets.AdminTextInputWidget
     if defaults.get('widget') == admin_widgets.AdminBigIntegerFieldWidget:
         defaults['widget'] = admin_widgets.AdminTextInputWidget
     # noinspection PyCallByClass,PyTypeChecker
     return Field.formfield(self, **defaults)
Exemplo n.º 17
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    def get_prep_value(self, value):
        """
        Prepare value for database insertion
        """
        value = Field.get_prep_value(self, value)
        if value is None:
            return value

        return orjson.dumps(list(map(str, value))).decode('utf-8')
Exemplo n.º 18
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        def is_expandable(self, field: Field) -> bool:
            # if not isinstance(field, ForeignKey) or field.get_tag('enumerable'):
            if not isinstance(field, ForeignKey) or field.get_tag(FieldTag.ENUMERABLE):
                return False

            return (
                issubclass(field.remote_field.model, CremeModel)
                or field.name in self.expandables
            )
Exemplo n.º 19
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def init_django_db(databases, debug=False):
    if databases is None:
        raise TypeError('can not find databases for Django initialization')

    import django
    from django.conf import settings
    django_config = {
        'DEBUG': debug,
        'DATABASES': databases,
    }
    settings.configure(**django_config)

    if hasattr(django, 'setup'):
        django.setup()

    # let django support Model.objects.filter(x__ne=3)
    from django.db.models import Field
    from djangoext.db.models.lookups import NotEqual
    Field.register_lookup(NotEqual)
Exemplo n.º 20
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    def _handle_o2m_related_field(self, related_field: Field,
                                  alias_object: Model):
        reverse_o2m_accessor_name = related_field.get_accessor_name()
        o2m_accessor_name = related_field.field.name

        for obj in getattr(alias_object, reverse_o2m_accessor_name).all():
            #logger.debug(f'Setting o2m field {o2m_accessor_name} on {obj._meta.model.__name__}[pk={obj.pk}] '
            #             f'to {self.model_meta.model_name}[pk={self.primary_object.pk}]')
            setattr(obj, o2m_accessor_name, self.primary_object)
            obj.save()
Exemplo n.º 21
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    def resolve_ref(name: str, *_: Any, **__: Any) -> 'Col':
        from django.db.models.expressions import Col
        from django.db.models.fields import Field
        # We need to do some faking of the ref resolution.
        # This essentially enables us to have a bit more complete
        # workings of F().

        # An interesting point to raise here is, we need to pass a Field in.
        # However, it doesn't need to be the "correct" field. At this point,
        # all conversion has been done, so now we just need to get a valid
        # target in.
        return Col(name, Field())
Exemplo n.º 22
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    def _handle_o2m_related_field(self, related_field: Field, alias_object: Model):
        if isinstance(related_field, GenericRelation):
            fields = related_field.remote_field.model._meta.private_fields
            matching_field = [f for f in fields if related_field._is_matching_generic_foreign_key(f)][0]

            reverse_o2m_accessor_name = related_field.get_attname()
            o2m_accessor_name = matching_field.name
        else:
            reverse_o2m_accessor_name = related_field.get_accessor_name()
            o2m_accessor_name = related_field.field.name

        for obj in getattr(alias_object, reverse_o2m_accessor_name).all():
            try:
                logger.debug(f'Attempting to set o2m field {o2m_accessor_name} on '
                             f'{obj._meta.model.__name__}[pk={obj.pk}] to '
                             f'{self.model_meta.model_name}[pk={self.primary_object.pk}] ...')
                setattr(obj, o2m_accessor_name, self.primary_object)
                obj.validate_unique()
                obj.save()
                logger.debug('success.')
            except ValidationError as e:
                logger.debug(f'failed. {e}')

                if self.raise_validation_exception:
                    raise

                if related_field.field.null:
                    logger.debug(f'Setting o2m field {o2m_accessor_name} on '
                                 f'{obj._meta.model.__name__}[pk={obj.pk}] to `None`')
                    setattr(obj, o2m_accessor_name, None)
                    obj.save()
                else:
                    logger.debug(f'Deleting {obj._meta.model.__name__}[pk={obj.pk}]')
                    _pk = obj.pk
                    obj.delete()
                    obj.pk = _pk  # pk is cached and re-assigned to keep the audit trail in tact
            self.modified_related_objects.append(obj)
Exemplo n.º 23
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def _column_sql(field: Field) -> str:
    """
    Generate the SQL required to create the given field in a CREATE TABLE
    statement.
    """

    field_type = field.get_internal_type()
    data_types = PostgreSQLDatabaseWrapper.data_types
    data_type_check_constraints = PostgreSQLDatabaseWrapper.data_type_check_constraints

    if isinstance(field, JSONField):
        column_type = "jsonb"
    elif isinstance(field, ForeignKey):
        column_type = "integer"
    else:
        column_type = data_types[field_type]

    try:
        check_constraint = data_type_check_constraints[field_type]
        check_constraint = check_constraint % {"column": field.column}
    except KeyError:
        check_constraint = None

    # Interpolate any dynamic values (like max_length)
    column_type = column_type % field.__dict__

    # Add NOT NULL if null values are not allowed
    if not field.null:
        column_type += " NOT NULL"

    if field.choices:
        # Assume that if choices is set, it's a char field and that the choices
        # are a list of strings that are valid values.
        column_type += f' CHECK ("{field.column}" IN ('
        column_type += ", ".join([f"'{choice}'" for _, choice in field.choices])
        column_type += "))"
    elif check_constraint:
        # If the column had a check constrain defined, add that
        column_type += f" CHECK ({check_constraint})"

    return f"{field.column} {column_type}"
Exemplo n.º 24
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	def pre_save(self, model_instance, add):
		file = Field.pre_save(self, model_instance, add)
		if file and (not file._committed or get_chunks_subdir() in file.name):
			# Commit the file to storage prior to saving the model
			# fpath = file.name.replace(settings.MEDIA_URL, self._safe_media_root())

			# api hack needed due to the way I setup DRF.
			if get_chunks_subdir() not in unquote(file.name):
				fpath = safe_media_root() + get_chunks_subdir() + unquote(file.name)
			else:
				fpath = safe_media_root() + unquote(file.name)

			basename = path.basename(fpath)
			name = self.generate_filename(model_instance, basename)
			new_fpath = file.storage.get_available_name(path.join(self.storage.location, name), max_length=self.max_length)
			basefolder = path.dirname(new_fpath)
			if not file.storage.exists(basefolder):
				makedirs(basefolder)
			file_move_safe(fpath, new_fpath)
			setattr(model_instance, self.name, name)
			file._committed = True
			file.name = name
		return file
Exemplo n.º 25
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from django.db.models import Field

from tools.NotEqualLookup import NotEqual

Field.register_lookup(NotEqual)
Exemplo n.º 26
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from django.db.models import Field, Func, Lookup


class SimilarityLookup(Lookup):
    lookup_name = 'similar'

    def as_sql(self, compiler, connection):
        lhs, lhs_params = self.process_lhs(compiler, connection)
        rhs, rhs_params = self.process_rhs(compiler, connection)
        params = lhs_params + rhs_params
        res = '{} %%> {}'.format(lhs, rhs), params
        return res


Field.register_lookup(SimilarityLookup)


class WordSimilarity(Func):
    template = '%(expressions)s'
    arg_joiner = '<<->'
Exemplo n.º 27
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from django_filters.rest_framework.backends import DjangoFilterBackend as BaseClass
from django_filters import compat
from django.db.models import Field

LOOKUP_TYPES = Field.get_lookups().keys()


class DjangoFilterBackend(BaseClass):
    """
    Supports field filtering.
    This functionality requires an entry to the REST_FRAMEWORK settings
    dictionary in settings.py:
    'DEFAULT_FILTER_BACKENDS': ('drf_jsonapi.backends.DjangoFilterBackend')
    """
    def get_schema_fields(self, view):
        """
        Retrieve a list of Field objects from a view

        :param self: This object instance
        :param view: A Django View
        :returns: A list of CoreApi Field objects
        """

        filter_class = getattr(view, 'filter_class', None)
        fields = []

        if not filter_class:
            return fields

        for field_name, field in filter_class.base_filters.items():
Exemplo n.º 28
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    class ILike(IContains):
        lookup_name = 'ilike'

        def process_lhs(self, qn, connection):
            lhs_sql, params = super(ILike, self).process_lhs(qn, connection)
            backend_name = backend.__name__
            if 'postgres' in backend_name or \
               'oracle' in backend_name:
                lhs_sql = 'UPPER(%s)' % lhs_sql
            return (lhs_sql, params)

        def get_rhs_op(self, connection, rhs):
            return connection.operators['icontains'] % rhs

    Field.register_lookup(Like)
    Field.register_lookup(ILike)

else:
    from django.db import connection
    from django.db.models.fields import Field, subclassing
    from django.db.models.sql.constants import QUERY_TERMS

    if isinstance(QUERY_TERMS, set):
        QUERY_TERMS.add('like')
        QUERY_TERMS.add('ilike')
    else:
        QUERY_TERMS['like'] = None
        QUERY_TERMS['ilike'] = None

    connection.operators['like'] = connection.operators['contains']
Exemplo n.º 29
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    def __init__(self, *args, **kwargs):
        kwargs['blank'] = True

        Field.__init__(self, *args, **kwargs)
Exemplo n.º 30
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 def __init__(self, *args, **kwargs):
     assert kwargs.get('primary_key', False) is True,\
     "%ss must have primary_key=True." % self.__class__.__name__
     kwargs['blank'] = True
     self.length = kwargs.pop("length",9)
     Field.__init__(self, *args, **kwargs)
Exemplo n.º 31
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    def formfield(self, **kwargs):

        defaults = {'max_length': self.max_length, 'widget': RubricateWidget}
        kwargs.update(defaults)
        return Field.formfield(self, **kwargs)
Exemplo n.º 32
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 def __init__(self, *args, **kwargs):
     Field.__init__(self, validators = [arrayvalidator], **kwargs)
Exemplo n.º 33
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 def __init__(self, verbose_name=None, name=None, separator=default_separator, **kwargs):
     self.separator = separator
     Field.__init__(self, verbose_name, name, **kwargs)
Exemplo n.º 34
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            return '%s = %s * %s' % (lhs, rhs, dimension), params

    return CoordinateLookup


class CoordinateValue(Transform):
    lookup_name = 'coord'

    def as_sql(self, compiler, connection):
        lhs, params = compiler.compile(self.lhs)
        return "%s" % lhs, params

    @property
    def output_field(self):
        return CoordinatesField()
Field.register_lookup(CoordinateValue)

p = Product.objects.get(stock_price__coord__x2=500)
print(p)

#**********************************************************************
#Expressions


from discount.models import Product
from django.db.models import F, Q, Count, Value, DateTimeField, ExpressionWrapper, Func, Aggregate, IntegerField, CharField
from django.db.models.functions import Length #???

from datetime import date

#https://docs.djangoproject.com/en/1.8/ref/models/expressions/
Exemplo n.º 35
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 def __init__(self, *args, **kwargs):
     assert kwargs.get('primary_key', False) is True,\
     "%ss must have primary_key=True." % self.__class__.__name__
     kwargs['blank'] = True
     self.length = kwargs.pop("length", 9)
     Field.__init__(self, *args, **kwargs)
Exemplo n.º 36
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    def __init__(self, *args, **kwargs):
        kwargs['blank'] = True

        Field.__init__(self, *args, **kwargs)
Exemplo n.º 37
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    tipo = models.CharField(max_length=127)
    filtro = models.ManyToManyField(Filtro, blank=True)
    color = models.CharField(max_length=127)
    uuid = models.UUIDField(  # usado por el api para buscar el registro
        db_index=True,
        default=uuid_lib.uuid4,
        editable=False)

    class Meta:
        unique_together = ('material', 'tipo', 'color')

    def save(self, *args, **kwargs):
        self.material = self.material.title()
        self.tipo = self.tipo.title()
        self.color = self.color.title()
        super(Lente, self).save(*args, **kwargs)


class Quotient(Lookup):
    lookup_name = 'qo'

    def as_sql(self, compiler, connection):
        lhs, lhs_params = self.process_lhs(compiler, connection)
        rhs, rhs_params = self.process_rhs(compiler, connection)
        div = [pow(10, 8 - get_count_digits(int(rhs_params[0])))]
        params = lhs_params + div + rhs_params
        return '{} / {} = {}'.format(lhs, '%s', rhs), params


Field.register_lookup(Quotient)
Exemplo n.º 38
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from django.contrib import admin

from publiapp_api import models
from django.db.models import Field

admin.site.register(models.UserProfile)
admin.site.register(models.Constantes)
admin.site.register(models.Anuncio)
admin.site.register(models.DetalleAnuncio)
admin.site.register(models.Precio)
admin.site.register(models.Categoria)
admin.site.register(models.Resenia)
admin.site.register(models.Rol)
admin.site.register(models.Ubigeo)
admin.site.register(models.Anunciante)
admin.site.register(models.Imagen)
admin.site.register(models.LogBusqueda)
admin.site.register(models.LogDetalleAnuncio)
admin.site.register(models.LogContacto)
admin.site.register(models.ArticuloOcacional)

Field.register_lookup(models.NotEqual)