Django 1.9 Migration Problems

Question

I am trying to transition my 1.8 app to Django 1.9. Simply creating the migrations for old databases is fine, but when I try to create a fresh database with migrate I get:

"Error creating new content types. Please make sure contenttypes " RuntimeError: Error creating new content types. Please make sure contenttypes is migrated before trying to migrate apps individually.

I have tested this a fair bit, and I can get it to build fresh if I: remove my site from URLs, migrate, add it back, and migrate again... but that's super janky, and not the clean build I am looking for. It seems that Django/core/management/base.py line 398 -> self.check() is called before the migration occurs, and the lack of a database throws an error and quits before setting up the database (catch 22). I have tested this by commenting this out, and that will also allow it to build the database.

Anyone have any recommendations for what a good way to fix this is or what the underlying problem might be in my app?

EDIT The complete stack trace:

(test) C:\website\test\rpi_csdt_community>python manage.py migrate
C:\website\test\rpi_csdt_community\collected_static/
C:\website\test\rpi_csdt_community\rpi_csdt_community\urls.py:27: RemovedInDjang
o110Warning: Support for string view arguments to url() is deprecated and will b
e removed in Django 1.10 (got rpi_csdt_community.views.home). Pass the callable
instead.
  url(r'^$', 'rpi_csdt_community.views.home', {}, 'home'),

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "C:\website\test\lib\site-packages\django\core\management\__init__.py", l
ine 353, in execute_from_command_line
    utility.execute()
  File "C:\website\test\lib\site-packages\django\core\management\__init__.py", l
ine 345, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\website\test\lib\site-packages\django\core\management\base.py", line
348, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\website\test\lib\site-packages\django\core\management\base.py", line
398, in execute
    self.check()
  File "C:\website\test\lib\site-packages\django\core\management\base.py", line
426, in check
    include_deployment_checks=include_deployment_checks,
  File "C:\website\test\lib\site-packages\django\core\checks\registry.py", line
75, in run_checks
    new_errors = check(app_configs=app_configs)
  File "C:\website\test\lib\site-packages\django\core\checks\urls.py", line 13,
in check_url_config
    return check_resolver(resolver)
  File "C:\website\test\lib\site-packages\django\core\checks\urls.py", line 23,
in check_resolver
    for pattern in resolver.url_patterns:
  File "C:\website\test\lib\site-packages\django\utils\functional.py", line 33,
in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\website\test\lib\site-packages\django\core\urlresolvers.py", line 417
, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "C:\website\test\lib\site-packages\django\utils\functional.py", line 33,
in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\website\test\lib\site-packages\django\core\urlresolvers.py", line 410
, in urlconf_module
    return import_module(self.urlconf_name)
  File "c:\python27\Lib\importlib\__init__.py", line 37, in import_module
    __import__(name)
  File "C:\website\test\rpi_csdt_community\rpi_csdt_community\urls.py", line 29,
 in <module>
    url(r'', include('project_share.urls')),
  File "C:\website\test\lib\site-packages\django\conf\urls\__init__.py", line 52
, in include
    urlconf_module = import_module(urlconf_module)
  File "c:\python27\Lib\importlib\__init__.py", line 37, in import_module
    __import__(name)
  File "C:\website\test\rpi_csdt_community\project_share\urls.py", line 4, in <m
odule>
    from project_share.views import ProjectList, ProjectTagList, ApplicationList
, DemoList
  File "C:\website\test\rpi_csdt_community\project_share\views.py", line 54, in
<module>
    class ProjectList(SearchableListMixin, SortableListMixin, ListView):
  File "C:\website\test\rpi_csdt_community\project_share\views.py", line 59, in
ProjectList
    queryset = Project.approved_projects().all()
  File "C:\website\test\rpi_csdt_community\project_share\models.py", line 150, i
n approved_projects
    return Project.objects.filter(approved=True)
  File "C:\website\test\lib\site-packages\django\db\models\manager.py", line 122
, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\website\test\lib\site-packages\secretballot\__init__.py", line 58, in
 get_queryset
    content_type = ContentType.objects.get_for_model(self.model).id
  File "C:\website\test\lib\site-packages\django\contrib\contenttypes\models.py"
, line 80, in get_for_model
    "Error creating new content types. Please make sure contenttypes "
RuntimeError: Error creating new content types. Please make sure contenttypes is
 migrated before trying to migrate apps individually.

Could you post the entire stacktrace? It smells as an initialization problem in your app. — Marco A.
Possible duplicate of Error creating new content types. Please make sure contenttypes is migrated before trying to migrate apps individually — Maxime Lorant
This is not a duplicate of that question. The contenttypes table has not yet been created. Neither the cause nor the solution is the same. — SillyInventor

SillyInventor SillyInventor · Accepted Answer · 2016-04-13T00:34:10

Fixed by replacing:

queryset = Project.approved_projects().all()

in my view with:

def get_queryset(self):
    return Project.approved_projects().all()

I guess it tries to test the view even before building the database... stupid mistake. But I'm leaving this here in case someone else struggles with it.

Django 1.9 Migration Problems

1 Answers