#21142: Referencing the User model and migrations
---------------------------------+-----------------------------
Reporter: mario.pfeifer@… | Owner:
Type: Bug | Status: new
Component: Migrations | Version: master
Severity: Normal | Keywords: Migration, Auth
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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Hi,
To verify this bug I use a very simple model in which I reference to the
User model:
{{{
from django.conf import settings
from django.db import models
class Article(models.Model):
name = models.CharField('Name', max_length=255)
author = models.ForeignKey(settings.AUTH_USER_MODEL)
}}}
After running ./manage.py makemigrations everything looks fine:
{{{
Do you want to enable migrations for app 'articles'? [y/N] y
Migrations for 'articles':
0001_initial.py:
- Create model Article
}}}
But running ./manage.py migrate runs into following error:
{{{
Traceback (most recent call last):
File "./manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/home/mario/django-trunk/django/core/management/__init__.py", line
397, in execute_from_command_line
utility.execute()
File "/home/mario/django-trunk/django/core/management/__init__.py", line
390, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/mario/django-trunk/django/core/management/base.py", line
242, in run_from_argv
self.execute(*args, **options.__dict__)
File "/home/mario/django-trunk/django/core/management/base.py", line
289, in execute
output = self.handle(*args, **options)
File "/home/mario/django-
trunk/django/core/management/commands/migrate.py", line 88, in handle
targets = executor.loader.graph.leaf_nodes()
File "/home/mario/django-trunk/django/utils/functional.py", line 49, in
__get__
res = instance.__dict__[self.func.__name__] = self.func(instance)
File "/home/mario/django-trunk/django/db/migrations/loader.py", line
169, in graph
graph.add_dependency(key, parent)
File "/home/mario/django-trunk/django/db/migrations/graph.py", line 40,
in add_dependency
raise KeyError("Dependency references nonexistent parent node %r" %
(parent,))
KeyError: "Dependency references nonexistent parent node (u'auth',
'0001_initial')"
}}}
The same happens when I directly reference to the User model:
{{{
from django.contrib.auth.models import User
from django.db import models
class Article(models.Model):
name = models.CharField('Name', max_length=255)
author = models.ForeignKey(User)
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/21142>
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