URL resolution issues in Django Tests - django

Question

I've written a django model that has a get_absolute_url method, with unit tests to make sure everything is kosher. The get_absolute_url tests pass no problem. The get_absolute_url method is written as so
def get_absolute_url(self):
return reverse("scheduling:klass", args=[self.pk])
This is the url routing to give context about how the urls flow.
#main.urls
urlpatterns = [
url(r'^$', homepage, name="home"),
url(r'^scheduling/', include('scheduling.urls', namespace="scheduling")),
url(r'^profile/', include('user_profile.urls', namespace="profile")),
url(r'^accounts/', include('allauth.urls')),
url(r'^admin/', admin.site.urls),
]
#scheduling.urls
urlpatterns = [
url(r'add-class/$', views.add_klass, name="add_klass"),
url(r'class/(?P<pk>\d+)/$', views.klass, name="klass"),
]
I'm testing the klass view (it's basically just a klass detail view) as follows
def test_klass_detail_template_renders(self):
print(self.klass.pk)
response = self.client.get(self.klass.get_absolute_url())
self.assertTemplateUsed(response, "scheduling/klass.html")
The test fails with the following stacktrace.
======================================================================
ERROR: test_klass_detail_template_renders (scheduling.tests.test_views.KlassViewTests)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/Users/me/.virtualenvs/myproject/lib/python3.5/site-packages/django/core/urlresolvers.py", line 586, in reverse
extra, resolver = resolver.namespace_dict[ns]
KeyError: 'myproject.profile'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/me/.virtualenvs/myproject/lib/python3.5/site-packages/django/template/defaulttags.py", line 507, in render
current_app=current_app)
File "/Users/me/.virtualenvs/myproject/lib/python3.5/site-packages/django/core/urlresolvers.py", line 596, in reverse
key)
django.core.urlresolvers.NoReverseMatch: 'myproject.profile' is not a registered namespace
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/me/Documents/Development/myproject/src/scheduling/tests/test_views.py", line 60, in test_klass_detail_template_renders
response = self.client.get(self.klass.get_absolute_url())
File "/Users/me/.virtualenvs/myproject/lib/python3.5/site-packages/django/test/client.py", line 503, in get
**extra)
File "/Users/me/.virtualenvs/myproject/lib/python3.5/site-packages/django/test/client.py", line 304, in get
return self.generic('GET', path, secure=secure, **r)
...
File "/Users/me/.virtualenvs/myproject/lib/python3.5/site-packages/django/core/urlresolvers.py", line 508, in _reverse_with_prefix
(lookup_view_s, args, kwargs, len(patterns), patterns))
django.core.urlresolvers.NoReverseMatch: Reverse for 'profile' with arguments '('',)' and keyword arguments '{}' not found. 2 pattern(s) tried: ['profile/$', 'profile/(?
P<username>[\\w+-.#]+)/$']
It implies that that get_absolute_url is passing the pk value of the klass model to the url pattern but it works when I test it manually and it works in literally every other situation.
This...is...a...head scratcher. Any help is appreciated.
UPDATE
I think it might have to do with test isolation. I've done some print debugging and found that each test creates a new instance of the klass model.
Here are my setUp and tearDown methods.
class KlassViewTests(TestCase):
def setUp(self):
self.factory = ClassMateFactory()
self.teacher = self.factory.create_teacher("Maria")
self.linked_student = self.factory.create_student(
"Milhouse",
self.teacher.profile
)
self.klass = self.factory.create_klass(
"Test Klass",
teachers=self.teacher.profile,
students=self.linked_student.profile
)
self.data = {
"name": "New Test Class",
"status": "A",
"students": [self.linked_student.profile.pk],
"teachers": [self.teacher.profile.pk]
}
super().setUp()
def tearDown(self):
print(self.klass.get_absolute_url())
self.teacher.delete()
self.linked_student.delete()
self.klass.delete()
super().tearDown()
Hopefully this helps clear things up.
EDIT
Added the url conf to provide more context

Answer 1

With the current state of your question it looks like a copy paste error. Why I think this:
The error is described by Django as:
django.core.urlresolvers.NoReverseMatch:
Reverse for 'profile' with arguments '('',)' and keyword arguments '{}' not found.
2 pattern(s) tried: ['profile/$', 'profile/(?P<username>[\\w+-.#]+)/$']
You have omitted part of the stack trace so I cannot be sure but the line that causes this error in your code is:
response = self.client.get(self.klass.get_absolute_url())
The model in question seems not to be profile but something called klass.
Seems...
It could also be that self.klass at this point actually refers to a profile (of a teacher or student) and that is why it uses the profile's get_absolute_url.
tl;dr I think you just need to thoroughly read through all of your code (maybe get some second pair of eyes) to find the little mistypings.