Пример #1
0
class BaseRegistrationSerializer(NodeSerializer):

    title = ser.CharField(read_only=True)
    description = ser.CharField(read_only=True)
    category_choices = NodeSerializer.category_choices
    category_choices_string = NodeSerializer.category_choices_string
    category = HideIfWithdrawal(
        ser.ChoiceField(read_only=True,
                        choices=category_choices,
                        help_text='Choices: ' + category_choices_string))
    date_modified = VersionedDateTimeField(source='last_logged',
                                           read_only=True)
    fork = HideIfWithdrawal(ser.BooleanField(read_only=True, source='is_fork'))
    collection = HideIfWithdrawal(
        ser.BooleanField(read_only=True, source='is_collection'))
    access_requests_enabled = HideIfWithdrawal(
        ser.BooleanField(read_only=True))
    node_license = HideIfWithdrawal(NodeLicenseSerializer(read_only=True))
    tags = HideIfWithdrawal(
        ValuesListField(attr_name='name',
                        child=ser.CharField(),
                        required=False))
    public = HideIfWithdrawal(
        ser.BooleanField(
            source='is_public',
            required=False,
            help_text='Nodes that are made public will give read-only access '
            'to everyone. Private nodes require explicit read '
            'permission. Write and admin access are the same for '
            'public and private nodes. Administrators on a parent '
            'node have implicit read permissions for all child nodes'))
    current_user_permissions = HideIfWithdrawal(
        ser.SerializerMethodField(
            help_text='List of strings representing the permissions '
            'for the current user on this node.'))

    pending_embargo_approval = HideIfWithdrawal(
        ser.BooleanField(
            read_only=True,
            source='is_pending_embargo',
            help_text=
            'The associated Embargo is awaiting approval by project admins.'))
    pending_registration_approval = HideIfWithdrawal(
        ser.BooleanField(
            source='is_pending_registration',
            read_only=True,
            help_text=
            'The associated RegistrationApproval is awaiting approval by project admins.'
        ))
    pending_withdrawal = HideIfWithdrawal(
        ser.BooleanField(
            source='is_pending_retraction',
            read_only=True,
            help_text=
            'The registration is awaiting withdrawal approval by project admins.'
        ))
    withdrawn = ser.BooleanField(
        source='is_retracted',
        read_only=True,
        help_text='The registration has been withdrawn.')

    date_registered = VersionedDateTimeField(
        source='registered_date',
        read_only=True,
        help_text='Date time of registration.')
    date_withdrawn = VersionedDateTimeField(
        source='retraction.date_retracted',
        read_only=True,
        help_text='Date time of when this registration was retracted.')
    embargo_end_date = HideIfWithdrawal(
        ser.SerializerMethodField(
            help_text='When the embargo on this registration will be lifted.'))

    withdrawal_justification = ser.CharField(source='retraction.justification',
                                             read_only=True)
    template_from = HideIfWithdrawal(
        ser.CharField(
            read_only=True,
            allow_blank=False,
            allow_null=False,
            help_text=
            'Specify a node id for a node you would like to use as a template for the '
            'new node. Templating is like forking, except that you do not copy the '
            'files, only the project structure. Some information is changed on the top '
            'level project by submitting the appropriate fields in the request body, '
            'and some information will not change. By default, the description will '
            'be cleared and the project will be made private.'))
    registration_supplement = ser.SerializerMethodField()
    registered_meta = HideIfWithdrawal(
        ser.SerializerMethodField(
            help_text=
            'A dictionary with supplemental registration questions and responses.'
        ))

    registered_by = HideIfWithdrawal(
        RelationshipField(
            related_view='users:user-detail',
            related_view_kwargs={'user_id': '<registered_user._id>'}))

    registered_from = HideIfWithdrawal(
        RelationshipField(
            related_view='nodes:node-detail',
            related_view_kwargs={'node_id': '<registered_from._id>'}))

    children = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-children',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_node_count'},
        ))

    comments = HideIfWithdrawal(
        RelationshipField(related_view='registrations:registration-comments',
                          related_view_kwargs={'node_id': '<_id>'},
                          related_meta={'unread': 'get_unread_comments_count'},
                          filter={'target': '<_id>'}))

    contributors = RelationshipField(
        related_view='registrations:registration-contributors',
        related_view_kwargs={'node_id': '<_id>'},
        related_meta={'count': 'get_contrib_count'})

    implicit_contributors = RelationshipField(
        related_view='registrations:registration-implicit-contributors',
        related_view_kwargs={'node_id': '<_id>'},
        help_text=
        'This feature is experimental and being tested. It may be deprecated.')

    files = HideIfWithdrawal(
        RelationshipField(related_view='registrations:registration-providers',
                          related_view_kwargs={'node_id': '<_id>'}))

    wikis = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-wikis',
            related_view_kwargs={'node_id': '<_id>'},
        ))

    forked_from = HideIfWithdrawal(
        RelationshipField(
            related_view=lambda n: 'registrations:registration-detail'
            if getattr(n, 'is_registration', False) else 'nodes:node-detail',
            related_view_kwargs={'node_id': '<forked_from_id>'}))

    template_node = HideIfWithdrawal(
        RelationshipField(
            related_view='nodes:node-detail',
            related_view_kwargs={'node_id': '<template_node._id>'}))

    license = HideIfWithdrawal(
        RelationshipField(
            related_view='licenses:license-detail',
            related_view_kwargs={
                'license_id': '<node_license.node_license._id>'
            },
        ))

    logs = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-logs',
            related_view_kwargs={'node_id': '<_id>'},
        ))

    forks = HideIfWithdrawal(
        RelationshipField(related_view='registrations:registration-forks',
                          related_view_kwargs={'node_id': '<_id>'}))

    node_links = ShowIfVersion(HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-pointers',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_pointers_count'},
            help_text=
            'This feature is deprecated as of version 2.1. Use linked_nodes instead.'
        )),
                               min_version='2.0',
                               max_version='2.0')

    parent = HideIfWithdrawal(
        RelationshipField(related_view='registrations:registration-detail',
                          related_view_kwargs={'node_id': '<parent_node._id>'},
                          filter_key='parent_node'))

    root = HideIfWithdrawal(
        RelationshipField(related_view='registrations:registration-detail',
                          related_view_kwargs={'node_id': '<root._id>'}))

    affiliated_institutions = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-institutions',
            related_view_kwargs={'node_id': '<_id>'}))

    registration_schema = RelationshipField(
        related_view='metaschemas:registration-metaschema-detail',
        related_view_kwargs={'metaschema_id': '<registered_schema_id>'})

    registrations = HideIfRegistration(
        RelationshipField(related_view='nodes:node-registrations',
                          related_view_kwargs={'node_id': '<_id>'}))

    draft_registrations = HideIfRegistration(
        RelationshipField(related_view='nodes:node-draft-registrations',
                          related_view_kwargs={'node_id': '<_id>'}))

    preprints = HideIfWithdrawal(
        HideIfRegistration(
            RelationshipField(related_view='nodes:node-preprints',
                              related_view_kwargs={'node_id': '<_id>'})))

    identifiers = HideIfWithdrawal(
        RelationshipField(related_view='registrations:identifier-list',
                          related_view_kwargs={'node_id': '<_id>'}))

    linked_nodes = HideIfWithdrawal(
        RelationshipField(related_view='registrations:linked-nodes',
                          related_view_kwargs={'node_id': '<_id>'},
                          related_meta={'count': 'get_node_links_count'},
                          self_view='registrations:node-pointer-relationship',
                          self_view_kwargs={'node_id': '<_id>'}))

    linked_registrations = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:linked-registrations',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_registration_links_count'},
            self_view='registrations:node-registration-pointer-relationship',
            self_view_kwargs={'node_id': '<_id>'}))

    view_only_links = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-view-only-links',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_view_only_links_count'},
        ))

    citation = HideIfWithdrawal(
        RelationshipField(related_view='registrations:registration-citation',
                          related_view_kwargs={'node_id': '<_id>'}))

    links = LinksField({
        'self': 'get_registration_url',
        'html': 'get_absolute_html_url'
    })

    def get_registration_url(self, obj):
        return absolute_reverse(
            'registrations:registration-detail',
            kwargs={
                'node_id':
                obj._id,
                'version':
                self.context['request'].parser_context['kwargs']['version']
            })

    def get_absolute_url(self, obj):
        return self.get_registration_url(obj)

    def create(self, validated_data):
        auth = get_user_auth(self.context['request'])
        draft = validated_data.pop('draft')
        registration_choice = validated_data.pop('registration_choice',
                                                 'immediate')
        embargo_lifted = validated_data.pop('lift_embargo', None)
        reviewer = is_prereg_admin_not_project_admin(self.context['request'],
                                                     draft)

        try:
            draft.validate_metadata(metadata=draft.registration_metadata,
                                    reviewer=reviewer,
                                    required_fields=True)
        except ValidationValueError as e:
            raise exceptions.ValidationError(e.message)

        registration = draft.register(auth, save=True)

        if registration_choice == 'embargo':
            if not embargo_lifted:
                raise exceptions.ValidationError(
                    'lift_embargo must be specified.')
            embargo_end_date = embargo_lifted.replace(tzinfo=pytz.utc)
            try:
                registration.embargo_registration(auth.user, embargo_end_date)
            except ValidationError as err:
                raise exceptions.ValidationError(err.message)
        else:
            try:
                registration.require_approval(auth.user)
            except NodeStateError as err:
                raise exceptions.ValidationError(err)

        registration.save()
        return registration

    def get_registered_meta(self, obj):
        if obj.registered_meta:
            meta_values = obj.registered_meta.values()[0]
            try:
                return json.loads(meta_values)
            except TypeError:
                return meta_values
            except ValueError:
                return meta_values
        return None

    def get_embargo_end_date(self, obj):
        if obj.embargo_end_date:
            return obj.embargo_end_date
        return None

    def get_registration_supplement(self, obj):
        if obj.registered_schema:
            schema = obj.registered_schema.first()
            if schema is None:
                return None
            return schema.name
        return None

    def get_current_user_permissions(self, obj):
        return NodeSerializer.get_current_user_permissions(self, obj)

    def update(self, registration, validated_data):
        auth = Auth(self.context['request'].user)
        # Update tags
        if 'tags' in validated_data:
            new_tags = validated_data.pop('tags', [])
            try:
                registration.update_tags(new_tags, auth=auth)
            except NodeStateError as err:
                raise Conflict(err.message)

        is_public = validated_data.get('is_public', None)
        if is_public is not None:
            if is_public:
                try:
                    registration.update(validated_data, auth=auth)
                except NodeUpdateError as err:
                    raise exceptions.ValidationError(err.reason)
                except NodeStateError as err:
                    raise exceptions.ValidationError(err.message)
            else:
                raise exceptions.ValidationError(
                    'Registrations can only be turned from private to public.')
        return registration

    class Meta:
        type_ = 'registrations'
Пример #2
0
class RegistrationSerializer(NodeSerializer):
    admin_only_editable_fields = [
        'affiliated_institutions',
        'article_doi',
        'custom_citation',
        'description',
        'is_pending_retraction',
        'is_public',
        'license',
        'license_type',
        'subjects',
        'withdrawal_justification',
        'category',
    ]

    # Remember to add new RegistrationSerializer fields to this list
    # if you don't need them to be anonymized
    non_anonymized_fields = NodeSerializer.non_anonymized_fields + [
        'archiving',
        'article_doi',
        'date_registered',
        'date_withdrawn',
        'embargo_end_date',
        'embargoed',
        'pending_embargo_approval',
        'pending_embargo_termination_approval',
        'pending_registration_approval',
        'pending_withdrawal',
        'provider',
        'registered_by',
        'registered_from',
        'registered_meta',
        'registration_responses',
        'registration_schema',
        'registration_supplement',
        'withdrawal_justification',
        'withdrawn',
    ]

    title = ser.CharField(read_only=True)
    description = ser.CharField(required=False,
                                allow_blank=True,
                                allow_null=True)
    category_choices = NodeSerializer.category_choices
    category_choices_string = NodeSerializer.category_choices_string
    category = ser.ChoiceField(required=False,
                               choices=category_choices,
                               help_text='Choices: ' + category_choices_string)
    date_modified = VersionedDateTimeField(source='last_logged',
                                           read_only=True)
    fork = HideIfWithdrawal(ser.BooleanField(read_only=True, source='is_fork'))
    collection = HideIfWithdrawal(
        ser.BooleanField(read_only=True, source='is_collection'))
    access_requests_enabled = HideIfWithdrawal(
        ser.BooleanField(read_only=True))
    node_license = HideIfWithdrawal(
        NodeLicenseSerializer(required=False, source='license'))
    tags = HideIfWithdrawal(
        ValuesListField(attr_name='name',
                        child=ser.CharField(),
                        required=False))
    article_doi = ser.CharField(required=False, allow_null=True)
    public = HideIfWithdrawal(
        ser.BooleanField(
            source='is_public',
            required=False,
            help_text='Nodes that are made public will give read-only access '
            'to everyone. Private nodes require explicit read '
            'permission. Write and admin access are the same for '
            'public and private nodes. Administrators on a parent '
            'node have implicit read permissions for all child nodes',
        ))
    current_user_permissions = HideIfWithdrawal(
        ser.SerializerMethodField(
            help_text='List of strings representing the permissions '
            'for the current user on this node.', ))

    pending_embargo_approval = HideIfWithdrawal(
        ser.BooleanField(
            read_only=True,
            source='is_pending_embargo',
            help_text=
            'The associated Embargo is awaiting approval by project admins.',
        ))
    pending_embargo_termination_approval = HideIfWithdrawal(
        ser.BooleanField(
            read_only=True,
            source='is_pending_embargo_termination',
            help_text=
            'The associated Embargo early termination is awaiting approval by project admins',
        ))
    embargoed = HideIfWithdrawal(
        ser.BooleanField(read_only=True, source='is_embargoed'))
    pending_registration_approval = HideIfWithdrawal(
        ser.BooleanField(
            source='is_pending_registration',
            read_only=True,
            help_text=
            'The associated RegistrationApproval is awaiting approval by project admins.',
        ))
    archiving = HideIfWithdrawal(ser.BooleanField(read_only=True))
    pending_withdrawal = HideIfWithdrawal(
        ser.BooleanField(
            source='is_pending_retraction',
            read_only=True,
            help_text=
            'The registration is awaiting withdrawal approval by project admins.',
        ))
    withdrawn = ser.BooleanField(
        source='is_retracted',
        read_only=True,
        help_text='The registration has been withdrawn.',
    )

    date_registered = VersionedDateTimeField(
        source='registered_date',
        read_only=True,
        help_text='Date time of registration.')
    date_withdrawn = VersionedDateTimeField(
        read_only=True,
        help_text='Date time of when this registration was retracted.')
    embargo_end_date = HideIfWithdrawal(
        ser.SerializerMethodField(
            help_text='When the embargo on this registration will be lifted.'))
    custom_citation = HideIfWithdrawal(
        ser.CharField(allow_blank=True, required=False))

    withdrawal_justification = ser.CharField(read_only=True)
    template_from = HideIfWithdrawal(
        ser.CharField(
            read_only=True,
            allow_blank=False,
            allow_null=False,
            help_text=
            'Specify a node id for a node you would like to use as a template for the '
            'new node. Templating is like forking, except that you do not copy the '
            'files, only the project structure. Some information is changed on the top '
            'level project by submitting the appropriate fields in the request body, '
            'and some information will not change. By default, the description will '
            'be cleared and the project will be made private.',
        ))
    registration_supplement = ser.SerializerMethodField()
    # Will be deprecated in favor of registration_responses
    registered_meta = HideIfWithdrawal(
        ser.SerializerMethodField(
            help_text=
            'A dictionary with supplemental registration questions and responses.',
        ))
    registration_responses = HideIfWithdrawal(
        ser.SerializerMethodField(
            help_text=
            'A dictionary with supplemental registration questions and responses.',
        ))
    registered_by = HideIfWithdrawal(
        RelationshipField(
            related_view='users:user-detail',
            related_view_kwargs={'user_id': '<registered_user._id>'},
        ))

    registered_from = RelationshipField(
        related_view='nodes:node-detail',
        related_view_kwargs={'node_id': '<registered_from._id>'},
    )

    children = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-children',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_node_count'},
        ))

    comments = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-comments',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={
                'unread': 'get_unread_comments_count',
                'count': 'get_total_comments_count',
            },
            filter={'target': '<_id>'},
        ))

    contributors = RelationshipField(
        related_view='registrations:registration-contributors',
        related_view_kwargs={'node_id': '<_id>'},
        related_meta={'count': 'get_contrib_count'},
    )

    bibliographic_contributors = RelationshipField(
        related_view='registrations:registration-bibliographic-contributors',
        related_view_kwargs={'node_id': '<_id>'},
    )

    implicit_contributors = RelationshipField(
        related_view='registrations:registration-implicit-contributors',
        related_view_kwargs={'node_id': '<_id>'},
        help_text=
        'This feature is experimental and being tested. It may be deprecated.',
    )

    files = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-storage-providers',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_files_count'},
        ))

    wikis = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-wikis',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_wiki_page_count'},
        ))

    forked_from = HideIfWithdrawal(
        RelationshipField(
            related_view=lambda n: 'registrations:registration-detail'
            if getattr(n, 'is_registration', False) else 'nodes:node-detail',
            related_view_kwargs={'node_id': '<forked_from_id>'},
        ))

    template_node = HideIfWithdrawal(
        RelationshipField(
            related_view='nodes:node-detail',
            related_view_kwargs={'node_id': '<template_node._id>'},
        ))

    license = HideIfWithdrawal(
        NodeLicenseRelationshipField(
            related_view='licenses:license-detail',
            related_view_kwargs={'license_id': '<license.node_license._id>'},
            read_only=False,
        ))

    logs = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-logs',
            related_view_kwargs={'node_id': '<_id>'},
        ))

    forks = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-forks',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_forks_count'},
        ))

    groups = HideIfRegistration(
        RelationshipField(
            related_view='nodes:node-groups',
            related_view_kwargs={'node_id': '<_id>'},
        ))

    node_links = ShowIfVersion(
        HideIfWithdrawal(
            RelationshipField(
                related_view='registrations:registration-pointers',
                related_view_kwargs={'node_id': '<_id>'},
                related_meta={'count': 'get_pointers_count'},
                help_text=
                'This feature is deprecated as of version 2.1. Use linked_nodes instead.',
            )),
        min_version='2.0',
        max_version='2.0',
    )

    linked_by_nodes = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-linked-by-nodes',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_linked_by_nodes_count'},
        ))

    linked_by_registrations = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-linked-by-registrations',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_linked_by_registrations_count'},
        ))

    parent = RelationshipField(
        related_view='registrations:registration-detail',
        related_view_kwargs={'node_id': '<parent_node._id>'},
        filter_key='parent_node',
    )

    root = RelationshipField(
        related_view='registrations:registration-detail',
        related_view_kwargs={'node_id': '<root._id>'},
    )

    region = HideIfWithdrawal(
        RelationshipField(
            related_view='regions:region-detail',
            related_view_kwargs={'region_id': '<osfstorage_region._id>'},
            read_only=True,
        ))

    affiliated_institutions = RelationshipField(
        related_view='registrations:registration-institutions',
        related_view_kwargs={'node_id': '<_id>'},
        self_view='registrations:registration-relationships-institutions',
        self_view_kwargs={'node_id': '<_id>'},
        read_only=False,
        many=True,
        required=False,
    )

    registration_schema = RelationshipField(
        related_view='schemas:registration-schema-detail',
        related_view_kwargs={'schema_id': '<registered_schema_id>'},
    )

    settings = HideIfRegistration(
        RelationshipField(
            related_view='nodes:node-settings',
            related_view_kwargs={'node_id': '<_id>'},
        ))

    registrations = HideIfRegistration(
        RelationshipField(
            related_view='nodes:node-registrations',
            related_view_kwargs={'node_id': '<_id>'},
        ))

    draft_registrations = HideIfRegistration(
        RelationshipField(
            related_view='nodes:node-draft-registrations',
            related_view_kwargs={'node_id': '<_id>'},
        ))

    preprints = HideIfWithdrawal(
        HideIfRegistration(
            RelationshipField(
                related_view='nodes:node-preprints',
                related_view_kwargs={'node_id': '<_id>'},
            )))

    identifiers = RelationshipField(
        related_view='registrations:identifier-list',
        related_view_kwargs={'node_id': '<_id>'},
    )

    linked_nodes = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:linked-nodes',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_node_links_count'},
            self_view='registrations:node-pointer-relationship',
            self_view_kwargs={'node_id': '<_id>'},
        ))

    linked_registrations = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:linked-registrations',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_registration_links_count'},
            self_view='registrations:node-registration-pointer-relationship',
            self_view_kwargs={'node_id': '<_id>'},
        ))

    view_only_links = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-view-only-links',
            related_view_kwargs={'node_id': '<_id>'},
            related_meta={'count': 'get_view_only_links_count'},
        ))

    citation = HideIfWithdrawal(
        RelationshipField(
            related_view='registrations:registration-citation',
            related_view_kwargs={'node_id': '<_id>'},
        ))

    provider = RegistrationProviderRelationshipField(
        related_view=
        'providers:registration-providers:registration-provider-detail',
        related_view_kwargs={'provider_id': '<provider._id>'},
        read_only=True,
    )

    @property
    def subjects_related_view(self):
        # Overrides TaxonomizableSerializerMixin
        return 'registrations:registration-subjects'

    @property
    def subjects_self_view(self):
        # Overrides TaxonomizableSerializerMixin
        return 'registrations:registration-relationships-subjects'

    links = LinksField({'html': 'get_absolute_html_url'})

    def get_absolute_url(self, obj):
        return obj.get_absolute_url()

    def get_registered_meta(self, obj):
        if obj.registered_meta:
            meta_values = self.anonymize_registered_meta(obj)
            try:
                return json.loads(meta_values)
            except TypeError:
                return meta_values
            except ValueError:
                return meta_values
        return None

    def get_registration_responses(self, obj):
        if obj.registration_responses:
            return self.anonymize_registration_responses(obj)
        return None

    def get_embargo_end_date(self, obj):
        if obj.embargo_end_date:
            return obj.embargo_end_date
        return None

    def get_registration_supplement(self, obj):
        if obj.registered_schema:
            schema = obj.registered_schema.first()
            if schema is None:
                return None
            return schema.name
        return None

    def get_current_user_permissions(self, obj):
        return NodeSerializer.get_current_user_permissions(self, obj)

    def get_view_only_links_count(self, obj):
        return obj.private_links.filter(is_deleted=False).count()

    def get_total_comments_count(self, obj):
        return obj.comment_set.filter(page='node', is_deleted=False).count()

    def get_files_count(self, obj):
        return obj.files_count or 0

    def anonymize_registered_meta(self, obj):
        """
        Looks at every question on every page of the schema, for any titles
        that have a contributor-input block type.  If present, deletes that question's response
        from meta_values.
        """
        cleaned_registered_meta = strip_registered_meta_comments(
            obj.registered_meta.values()[0])
        return self.anonymize_fields(obj, cleaned_registered_meta)

    def anonymize_registration_responses(self, obj):
        """
        For any questions that have a `contributor-input` block type, delete
        that question's response from registration_responses.

        We want to make sure author's names that need to be anonymized
        aren't surfaced when viewed through an anonymous VOL
        """
        return self.anonymize_fields(obj, obj.registration_responses)

    def anonymize_fields(self, obj, data):
        """
        Consolidates logic to anonymize fields with contributor information
        on both registered_meta and registration_responses
        """
        if is_anonymized(self.context['request']):
            anonymous_registration_response_keys = obj.get_contributor_registration_response_keys(
            )

            for key in anonymous_registration_response_keys:
                if key in data:
                    del data[key]

        return data

    def check_admin_perms(self, registration, user, validated_data):
        """
        While admin/write users can make both make modifications to registrations,
        most fields are restricted to admin-only edits.  You must be an admin
        contributor on the registration; you cannot have gotten your admin
        permissions through group membership.

        Add fields that need admin perms to admin_only_editable_fields
        """
        user_is_admin = registration.is_admin_contributor(user)
        for field in validated_data:
            if field in self.admin_only_editable_fields and not user_is_admin:
                raise exceptions.PermissionDenied()

    def update_registration_tags(self, registration, validated_data, auth):
        new_tags = validated_data.pop('tags', [])
        try:
            registration.update_tags(new_tags, auth=auth)
        except NodeStateError as err:
            raise Conflict(str(err))

    def retract_registration(self, registration, validated_data, user):
        is_pending_retraction = validated_data.pop('is_pending_retraction',
                                                   None)
        withdrawal_justification = validated_data.pop(
            'withdrawal_justification', None)
        if withdrawal_justification and not is_pending_retraction:
            raise exceptions.ValidationError(
                'You cannot provide a withdrawal_justification without a concurrent withdrawal request.',
            )
        if is_truthy(is_pending_retraction):
            if registration.is_pending_retraction:
                raise exceptions.ValidationError(
                    'This registration is already pending withdrawal.')
            try:
                retraction = registration.retract_registration(
                    user, withdrawal_justification, save=True)
            except NodeStateError as err:
                raise exceptions.ValidationError(str(err))
            retraction.ask(
                registration.get_active_contributors_recursive(
                    unique_users=True))
        elif is_pending_retraction is not None:
            raise exceptions.ValidationError(
                'You cannot set is_pending_withdrawal to False.')

    def update(self, registration, validated_data):
        user = self.context['request'].user
        auth = Auth(user)
        self.check_admin_perms(registration, user, validated_data)
        validated_data.pop('_id', None)

        if 'tags' in validated_data:
            self.update_registration_tags(registration, validated_data, auth)
        if 'custom_citation' in validated_data:
            registration.update_custom_citation(
                validated_data.pop('custom_citation'), auth)
        if 'license_type' in validated_data or 'license' in validated_data:
            license_details = get_license_details(registration, validated_data)
            validated_data['node_license'] = license_details
            validated_data.pop('license_type', None)
            validated_data.pop('license', None)
        if 'affiliated_institutions' in validated_data:
            institutions_list = validated_data.pop('affiliated_institutions')
            new_institutions = [{
                '_id': institution
            } for institution in institutions_list]
            update_institutions(registration, new_institutions, user)
            registration.save()
        if 'subjects' in validated_data:
            subjects = validated_data.pop('subjects', None)
            self.update_subjects(registration, subjects, auth)
        if 'withdrawal_justification' in validated_data or 'is_pending_retraction' in validated_data:
            self.retract_registration(registration, validated_data, user)
        if 'is_public' in validated_data:
            if validated_data.get('is_public') is False:
                raise exceptions.ValidationError(
                    'Registrations can only be turned from private to public.')

        try:
            registration.update(validated_data, auth=auth)
        except ValidationError as e:
            raise InvalidModelValueError(detail=e.messages[0])
        except NodeUpdateError as err:
            raise exceptions.ValidationError(err.reason)
        except NodeStateError as err:
            raise exceptions.ValidationError(str(err))

        return registration

    class Meta:
        type_ = 'registrations'
class DraftRegistrationSerializer(DraftRegistrationLegacySerializer, TaxonomizableSerializerMixin):
    """
    New DraftRegistrationSerializer - instead of the node_id being provided in the URL, an optional
    node is passed in under `branched_from`.

    DraftRegistrations have several fields that can be edited that are persisted to the final registration.
    """
    category_choices = list(settings.NODE_CATEGORY_MAP.items())
    category_choices_string = ', '.join(["'{}'".format(choice[0]) for choice in category_choices])

    title = ser.CharField(required=False, allow_blank=True)
    description = ser.CharField(required=False, allow_blank=True, allow_null=True)

    category = ser.ChoiceField(required=False, choices=category_choices, help_text='Choices: ' + category_choices_string)
    tags = ValuesListField(attr_name='name', child=ser.CharField(), required=False)
    node_license = NodeLicenseSerializer(required=False, source='license')

    links = LinksField({
        'self': 'get_absolute_url',
    })

    affiliated_institutions = RelationshipField(
        related_view='draft_registrations:draft-registration-institutions',
        related_view_kwargs={'draft_id': '<_id>'},
        self_view='draft_registrations:draft-registration-relationships-institutions',
        self_view_kwargs={'draft_id': '<_id>'},
        read_only=False,
        many=True,
        required=False,
    )

    branched_from = NodeRelationshipField(
        related_view=lambda n: 'draft_nodes:draft-node-detail' if getattr(n, 'type', False) == 'osf.draftnode' else 'nodes:node-detail',
        related_view_kwargs={'node_id': '<branched_from._id>'},
        read_only=False,
        required=False,
    )

    contributors = RelationshipField(
        related_view='draft_registrations:draft-registration-contributors',
        related_view_kwargs={'draft_id': '<_id>'},
    )

    license = NodeLicenseRelationshipField(
        related_view='licenses:license-detail',
        related_view_kwargs={'license_id': '<license.node_license._id>'},
        read_only=False,
    )

    @property
    def subjects_related_view(self):
        # Overrides TaxonomizableSerializerMixin
        return 'draft_registrations:draft-registration-subjects'

    @property
    def subjects_view_kwargs(self):
        # Overrides TaxonomizableSerializerMixin
        return {'draft_id': '<_id>'}

    @property
    def subjects_self_view(self):
        # Overrides TaxonomizableSerializerMixin
        return 'draft_registrations:draft-registration-relationships-subjects'

    def get_self_url(self, obj):
        return absolute_reverse(
            'draft_registrations:draft-registration-list',
            kwargs={
                'version': self.context['request'].parser_context['kwargs']['version'],
            },
        )
    def get_absolute_url(self, obj):
        return obj.get_absolute_url()

    # Overrides DraftRegistrationLegacySerializer
    def get_node(self, validated_data):
        # Node comes from branched_from relationship rather than from URL
        return validated_data.pop('branched_from', None)

    def expect_subjects_as_relationships(self, request):
        """Determines whether subjects should be serialized as a relationship.
        Older serializers expect subjects as attributes for earlier versions,
        but this new serializer does not have to adhere to that same behavior.
        :param object request: Request object
        :return bool: Subjects should be serialized as relationships
        """
        # Overrides TaxonomizableSerializerMixin
        return True