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
21958	Migrations fail on adding ForeignKey field to User model	code22	Andrew Godwin <andrew@…>	"It seems that migrations have problems with adding columns with foreign key to User tables. This happens both if I use `settings.AUTH_USER_MODEL` and `django.contrib.auth.model.User`.

My model looked like this:
{{{#!python
class TestModel(models.Model):

    text = models.CharField(max_length=10)
}}}
so if I add User field 
{{{#!python
class TestModel(models.Model):

    text = models.CharField(max_length=10)
    user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True)
}}}

then run `manage.py makemigrations` and then `manage.py migrate` I get this:
{{{
Operations to perform:
  Synchronize unmigrated apps: admin, contenttypes, auth, sessions
  Apply all migrations: migr_test
Synchronizing apps without migrations:
  Creating tables...
  Installing custom SQL...
  Installing indexes...
Installed 0 object(s) from 0 fixture(s)
Running migrations:
  Applying migr_test.0002_testmodel_user...Traceback (most recent call last):
  File ""./manage.py"", line 10, in <module>
    execute_from_command_line(sys.argv)
  File ""/private/tmp/test_env/src/django/django/core/management/__init__.py"", line 427, in execute_from_command_line
    utility.execute()
  File ""/private/tmp/test_env/src/django/django/core/management/__init__.py"", line 419, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File ""/private/tmp/test_env/src/django/django/core/management/base.py"", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File ""/private/tmp/test_env/src/django/django/core/management/base.py"", line 337, in execute
    output = self.handle(*args, **options)
  File ""/private/tmp/test_env/src/django/django/core/management/commands/migrate.py"", line 145, in handle
    executor.migrate(targets, plan, fake=options.get(""fake"", False))
  File ""/private/tmp/test_env/src/django/django/db/migrations/executor.py"", line 60, in migrate
    self.apply_migration(migration, fake=fake)
  File ""/private/tmp/test_env/src/django/django/db/migrations/executor.py"", line 94, in apply_migration
    migration.apply(project_state, schema_editor)
  File ""/private/tmp/test_env/src/django/django/db/migrations/migration.py"", line 97, in apply
    operation.database_forwards(self.app_label, schema_editor, project_state, new_state)
  File ""/private/tmp/test_env/src/django/django/db/migrations/operations/fields.py"", line 35, in database_forwards
    field,
  File ""/private/tmp/test_env/src/django/django/db/backends/sqlite3/schema.py"", line 96, in add_field
    self._remake_table(model, create_fields=[field])
  File ""/private/tmp/test_env/src/django/django/db/backends/sqlite3/schema.py"", line 33, in _remake_table
    if field.get_default():
  File ""/private/tmp/test_env/src/django/django/db/models/fields/related.py"", line 1649, in get_default
    if isinstance(field_default, self.rel.to):
TypeError: isinstance() arg 2 must be a class, type, or tuple of classes and types
}}}
    
Used Python3.3.3 and Python2.7.6 with the same result"	Bug	closed	Migrations	1.7-alpha-1	Release blocker	fixed			Accepted	0	0	0	0	0	0