My pytest suite is currently not working, as the reverse lookup is failing
for admin views; for example, trying to access
`reverse('admin:myapp_mymodel_changelist')` or
`reverse_lazy('admin:myapp_mymodel_changelist')`.
I have narrowed down the cause to the trigger being *any* kind of import
being made from the `admin.py` code for that app; the available URLs are
still there for all the other apps but *not* for the one being imported.
In `django/urls/resolvers.py` package, the available possible matches are
determined here:
possibilities = self.reverse_dict.getlist(lookup_view)
And one can add a debug statement which shows all the keys:
keys = [key for key in [*self.reverse_dict] if isinstance(key, str)]
print(keys)
Some basic test code, which I run in the Django shell, demonstrates how the
failure is triggered, and shows that this is not an artefact related to the
tests themselves:
from django.core.urlresolvers import reverse_lazy
from myapp.admin import MyModelAdmin
print(reverse_lazy('admin:myapp_mymodel_changelist'))
But this passes:
from django.core.urlresolvers import reverse_lazy
print(reverse_lazy('admin:myapp_mymodel_changelist'))
i.e. if I comment out the import line the code works, otherwise it fails.
Any ideas on why Django is failing when importing from the app's admin?
Thanks
Derek
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