I don't know if I'm following a wrong pattern in the context of Django.
Inside my class views I need manage exceptions and I would like to pass the
response workflow to an external method (my exceptions module). In my call
I pass my ClassView.request variable to be able to use request context
processors.
I paste an excerpt, where I do the render_to_response call directly from
the form_valid method, just to test it.
class ProjectCreateView(FormView):
"""Create view."""
(...)
def form_valid(self, form):
"""Form and logic behind project creation."""
project_file = form.cleaned_data['project_file']
thumbnail = form.cleaned_data['thumbnail']
description = form.cleaned_data['description']
try:
<something to try>
except IntegrityError as e:
data = {'error':{'msg':_('project_overwrite_error')}}
return
render_to_response('generic_error.html',data,context_instance=RequestContext(self.request))
except Exception as e:
return HttpResponse(e)
return HttpResponseRedirect(self.group.get_absolute_url())
(...)
Passing the RequestContext instance causes a DatabaseError, raised when it
tries to test the user.is_authenticated template context variable.
I've noticed that when used in a basic view method, the resolution of
user.is_authenticated is called only once, while it's hit twice in the case
of the generic view. I don't know if it can be the source of the error...
Another strange thing is that it doesn't happen if I debug with a
breakpoint inside the view dispathc method. Wired!
Here it is the stacktrace: https://gist.github.com/anonymous/6460412
First, I would like to understand why this happens.
Second, how should Itransfer the response flow outside a generic view? It
works fine until I don't ask for the user variable, so I suppose there
should be a cleaner way to manage the control tranfer.
Would you help me to solve the issue?
Thanks a lot,
Giovanni
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