Python EventSeries.register_delete_rule Examples

Example #1

def register_delete_rules():
    """

    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 app.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)

Example #2

def register_delete_rules():
    """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 app.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)

Example #3

File: __init__.py Project: parthibanloganathan/adi-website

def register_delete_rules():
    """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 app.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)