id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
22568	FK to proxy model breaks migrate	leftmoose	Andrew Godwin	"Situation similar to #22527

but for new 1.7 migrations

{{{#!python
installed_apps = (
    ...
    app1, app2, app3
)

db: postgres (to enfoce constraints)

app1.models:
from django.db import models

class Model1(models.Model):
    foreign2 = models.ForeignKey('app2.Model2')

app2.models:
from app3.models import Model3

class Model2(Model3):
    class Meta:
        proxy = True

app3.models:
from django.db import models

# Create your models here.
class Model3(models.Model):
    pass
}}}


{{{
$ manage.py makemigrations app3
$ manage.py makemigrations app1

$ ./manage.py test
Creating test database for alias 'default'...
Traceback (most recent call last):
  File ""./manage.py"", line 10, in <module>
    execute_from_command_line(sys.argv)
  File ""/Users/david/dev/django_source/django/core/management/__init__.py"", line 427, in execute_from_command_line
    utility.execute()
  File ""/Users/david/dev/django_source/django/core/management/__init__.py"", line 419, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File ""/Users/david/dev/django_source/django/core/management/commands/test.py"", line 50, in run_from_argv
    super(Command, self).run_from_argv(argv)
  File ""/Users/david/dev/django_source/django/core/management/base.py"", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File ""/Users/david/dev/django_source/django/core/management/commands/test.py"", line 71, in execute
    super(Command, self).execute(*args, **options)
  File ""/Users/david/dev/django_source/django/core/management/base.py"", line 337, in execute
    output = self.handle(*args, **options)
  File ""/Users/david/dev/django_source/django/core/management/commands/test.py"", line 88, in handle
    failures = test_runner.run_tests(test_labels)
  File ""/Users/david/dev/django_source/django/test/runner.py"", line 147, in run_tests
    old_config = self.setup_databases()
  File ""/Users/david/dev/django_source/django/test/runner.py"", line 109, in setup_databases
    return setup_databases(self.verbosity, self.interactive, **kwargs)
  File ""/Users/david/dev/django_source/django/test/runner.py"", line 297, in setup_databases
    verbosity, autoclobber=not interactive)
  File ""/Users/david/dev/django_source/django/db/backends/creation.py"", line 368, in create_test_db
    test_database=True)
  File ""/Users/david/dev/django_source/django/core/management/__init__.py"", line 167, in call_command
    return klass.execute(*args, **defaults)
  File ""/Users/david/dev/django_source/django/core/management/base.py"", line 337, in execute
    output = self.handle(*args, **options)
  File ""/Users/david/dev/django_source/django/core/management/commands/migrate.py"", line 145, in handle
    executor.migrate(targets, plan, fake=options.get(""fake"", False))
  File ""/Users/david/dev/django_source/django/db/migrations/executor.py"", line 60, in migrate
    self.apply_migration(migration, fake=fake)
  File ""/Users/david/dev/django_source/django/db/migrations/executor.py"", line 88, in apply_migration
    if self.detect_soft_applied(migration):
  File ""/Users/david/dev/django_source/django/db/migrations/executor.py"", line 132, in detect_soft_applied
    apps = project_state.render()
  File ""/Users/david/dev/django_source/django/db/migrations/state.py"", line 52, in render
    raise InvalidBasesError(""Cannot resolve bases for %r"" % new_unrendered_models)
django.db.migrations.state.InvalidBasesError: Cannot resolve bases for [<django.db.migrations.state.ModelState object at 0x10b2a8dd0>]
}}}"	Bug	closed	Migrations	1.7-beta-2	Release blocker	fixed			Accepted	1	0	1	1	0	0