Reverse_delete_rule circular import

Question

If I have two models, User and Address, and they reference each other like this:

# usermodel.py
from address import Address
from mongoengine import *
class User(Document):
    name = StringField()
    address = ReferenceField(Address)

# address.py
from mongoengine import *
class Address(Document):
     owner = ReferenceField('User', reverse_delete_rule=2)

I get the error message:

NotRegistered('`User` has not been registered in the document registry.
Importing the document class automatically registers it, has it been imported?',)

Can I set up a signal on one document and a reverse_delete_rule on another? I believe this is happening because reverse_delete_rule needs to register the document.

You've edited code but not description. "If I have two models, `User` and `FriendRequest`" there is no `FriendRequest` — vishes_shell, May 08 '17 at 19:29

score 0 · Accepted Answer · answered May 08 '17 at 19:47

This can be solved by using the alternate notation for reverse_delete_rule:

User.register_delete_rule(Address, 'owner', CASCADE)

So the documents would be updated like this:

# usermodel.py
from address import Address
from mongoengine import *
class User(Document):
    name = StringField()
    address = ReferenceField(Address)

User.register_delete_rule(Address, 'owner', CASCADE)

# address.py
from mongoengine import *
class Address(Document):
     owner = ReferenceField('User')

Reverse_delete_rule circular import

1 Answers1