#16511: Problem with import and GFK
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Reporter: rjdg@… | Owner: nobody
Type: Bug | Status: new
Milestone: | Component:
Version: 1.3 | contrib.contenttypes
Keywords: | Severity: Normal
import,genericforeignkey,genericrelation| Triage Stage: Unreviewed
Has patch: 0 | Easy pickings: 0
UI/UX: 0 |
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Hello,
I have an error "Cannot import name <model name>" and find out why. It
seems a bit strange so I report it as a bug.
Description:
We have two apps: x and y. And two Models: A (in x) and B (in y)
B has a generic foreign key
A has generic relation to B
I added this line to y.models:
from x.models import A
And Django raises error: "Cannot import name A" when I try to use python
manage.py commands.
I needed this import line because I wanted to add third model - C in
y.models, which would have a foreignkey to A
I've tested it also in a new empty django project and it works (hmm, in
fact doesn't work) exactly that way.
Source:
x.models:
from django.db import models
from django.contrib.contenttypes import generic
from y.models import B
class A:
b_rel = generic.GenericRelation(B)
y.models:
from django.db import models
from django.contrib.contenttypes import generic
from x.models import A
class B:
content_object = generic.GenericForeignKey()
class C:
a = models.ForeignKey(A)
Removing import of A (and respectivly, the foreignkey to A in C) fixes the
problem. I think it shouldn't be like that. I don't want to split
application y to store C in separate file.
If it's a known problem I'm sorry, I've searched.
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Ticket URL: <https://code.djangoproject.com/ticket/16511>
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