I want to have a model view with an optional argument that's specified
by the model's get_absolute_url. This argument is None if the model's
page is accessed by the user typing in the URL in his browser, while
the argument is set to some value if the model's page is accessed by
clicking on a link such as the "View on site" button in the admin
site.
This is what I came up with first:
The model:
class MyModel(models.Model):
...
@models.permalink
def get_absolute_url(self):
return ('mymodels.views.model_view', (),
{ 'a': self.some_field,
'b': self.another_field,
'c': something_else_again } )
The URLConf:
(r'^(?P<a>[-\w]+)/(?P<b>[-\w]+)/$', 'model_view')
The view:
def model_view(request, a, b, c = None):
if c:
# Do something
else:
# Do something else
Accessing the model's page by just typing in a URL works (where c is
None). However, accessing the model's page by, say, clicking "View on
site" in the admin (where c should be set to the model type's ID)
gives me this NoReverseMatch error:
NoReverseMatch at /admin/r/<xy>/<z>/
Reverse for '<function model_view at 0x...>' with arguments '()' and
keyword arguments '{'a': u'something', 'b': u'something-else', 'c':
'something-else-again'}' not found.
Exception location: C:\Python26\lib\site-packages\django\core
\urlresolvers.py in reverse, line 291
What is the proper way to introduce optional arguments here?
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