AppRegistryNotReady: lazy format_html()?

Question

Why do I get this exception?

Traceback (most recent call last):
  File "/path1/myapp-isu/myapp_isu/tests/unit/views/test_view_isu.py", line 8, in <module>
    from myapp_isu.search_form import ISUSearchForm
  File "/path1/myapp-isu/myapp_isu/search_form.py", line 87, in <module>
    class ISUSearchForm(forms.Form):
  File "/path1/myapp-isu/myapp_isu/search_form.py", line 108, in ISUSearchForm
    foo_filter=forms.ModelChoiceField(FooFilter.objects.all(), label=format_html('<a href="%s">%s</a>', reverse_lazy('foo-filter'), FooFilter._meta.verbose_name))
  File "/path1/dt/dt/utils/templateutils.py", line 127, in reverse
    return urlresolvers.reverse(*args, **kwargs)
  File "/path1/dt/dt/utils/urlresolverutils.py", line 49, in patched_reverse
    base_url = orig_reverse(viewname, urlconf=urlconf, args=args, kwargs=kwargs, prefix=prefix, current_app=current_app)
  File "/path2/django/core/urlresolvers.py", line 578, in reverse
    return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)))
  File "/path2/django/core/urlresolvers.py", line 432, in _reverse_with_prefix
    self._populate()
  File "/path2/django/core/urlresolvers.py", line 284, in _populate
    for pattern in reversed(self.url_patterns):
  File "/path2/django/core/urlresolvers.py", line 401, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/path2/django/core/urlresolvers.py", line 395, in urlconf_module
    self._urlconf_module = import_module(self.urlconf_name)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/path1/myapp-eins/myapp_eins/etc/rooturls.py", line 13, in <module>
    admin.autodiscover()
  File "/path2/django/contrib/admin/__init__.py", line 24, in autodiscover
    autodiscover_modules('admin', register_to=site)
  File "/path2/django/utils/module_loading.py", line 67, in autodiscover_modules
    for app_config in apps.get_app_configs():
  File "/path2/django/apps/registry.py", line 137, in get_app_configs
    self.check_apps_ready()
  File "/path2/django/apps/registry.py", line 124, in check_apps_ready
    raise AppRegistryNotReady("Apps aren't loaded yet.")
django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.

It only happens if I call the unittest via PyCharm, not if I use py.test on the shell.

I guess reverse_lazy() is not lazy here, since it gets used in format_html(). Any way to have a lazy format_html()?

Versions:

• Django 1.8
• Pycharm 5.0.4

Answer 1

Since there are things like url_patterns in the stacktrace, I assume that DJANGO_SETTINGS_MODULE is set correctly .

But, you still need to call django.setup() before running anything else.

import django
django.setup()

For me, that made this error message go away.