def register_delete_rules(self):
"""Registers rules for how Mongoengine handles the deletion of objects
that are being referenced by other objects.
See the documentation for
:func:`mongoengine.model.register_delete_rule` for more information.
All delete rules for User fields must by DENY, because User objects
should never be deleted. Lists of reference fields should PULL, to
remove deleted objects from the list, and all others should NULLIFY
"""
from eventum.models import (Event, EventSeries, User, Post, BlogPost,
Image)
from mongoengine import NULLIFY, PULL, DENY
Event.register_delete_rule(EventSeries, 'events', PULL)
Image.register_delete_rule(BlogPost, 'images', PULL)
Image.register_delete_rule(User, 'image', NULLIFY)
Image.register_delete_rule(BlogPost, 'featured_image', NULLIFY)
Image.register_delete_rule(Event, 'image', NULLIFY)
EventSeries.register_delete_rule(Event, 'parent_series', NULLIFY)
User.register_delete_rule(Event, 'creator', DENY)
User.register_delete_rule(Image, 'creator', DENY)
User.register_delete_rule(Post, 'author', DENY)
User.register_delete_rule(Post, 'posted_by', DENY)
def register_delete_rules(self):
"""Registers rules for how Mongoengine handles the deletion of objects
that are being referenced by other objects.
See the documentation for
:func:`mongoengine.model.register_delete_rule` for more information.
All delete rules for User fields must by DENY, because User objects
should never be deleted. Lists of reference fields should PULL, to
remove deleted objects from the list, and all others should NULLIFY
"""
from eventum.models import (Event, EventSeries, User, Post, BlogPost,
Image)
from mongoengine import NULLIFY, PULL, DENY
Event.register_delete_rule(EventSeries, 'events', PULL)
Image.register_delete_rule(BlogPost, 'images', PULL)
Image.register_delete_rule(User, 'image', NULLIFY)
Image.register_delete_rule(BlogPost, 'featured_image', NULLIFY)
Image.register_delete_rule(Event, 'image', NULLIFY)
EventSeries.register_delete_rule(Event, 'parent_series', NULLIFY)
User.register_delete_rule(Event, 'creator', DENY)
User.register_delete_rule(Image, 'creator', DENY)
User.register_delete_rule(Post, 'author', DENY)
User.register_delete_rule(Post, 'posted_by', DENY)
