I've been looking through the ModelForms code and can't really find a
way to fix this.
I changed the view code to this:
print form.category.queryset
form.category.queryset =
Category.objects.filter(blog__exact=request.user.author_set.all()
[0].blog)
print form.category.queryset
And my console output is this:
[<Category: another category>, <Category: my cat>, <Category: random
cat>]
[<Category: random cat>]
So the first line is all of the categories and the second line is the
filtered queryset. However, the html form still shows all of the
categories...
On Jun 17, 2:06 am, "Jonas Oberschweiber" <[EMAIL PROTECTED]>
wrote:
> Hmm, yeah, I guess it should... I don't really know much about the
> inner workings of ModelForms, but you could try inserting print
> statements or something the like directly in the django code for
> testing purposes. Or just look at the django code. That almost always
> solves the problems I have.
>
> On Tue, Jun 17, 2008 at 8:03 AM, emont88 <[EMAIL PROTECTED]> wrote:
>
> > Ok, that makes sense, but I'm still getting weird behavior.
> > Right after I call limit_categories() in my view, I inserted the print
> > statement: "print form.category.queryset" so that I can see the
> > contents of the queryset printed to the console. The result is that
> > the console shows the correct thing - only the categories that belong
> > to the current blog. However, the form itself still somehow displays
> > all of the categories, or the categories that belong to the previous
> > user's blog if I just logged out and logged in.
> > If form.category.queryset is showing the right thing when printed to
> > the console, shouldn't that be exactly what ends up in the html form?
>
> > On Jun 17, 1:37 am, "Jonas Oberschweiber" <[EMAIL PROTECTED]>
> > wrote:
> >> AFAIK querysets are always cached.
>
> >> On Tue, Jun 17, 2008 at 7:06 AM, emont88 <[EMAIL PROTECTED]> wrote:
>
> >> > I'm running into an interesting problem with ModelForms.
> >> > I have a blogging app that handles multiple blogs, which makes things
> >> > tricky with categories, because each category needs to belong to a
> >> > specific blog, so an author editing blog1 should not be allowed to
> >> > post an Entry to a Category from blog2. I am using ModelForms to
> >> > generate the forms for posting a new Entry, which makes things pretty
> >> > straightforward except for the Category foreignkey. I wrote a method
> >> > "limit_categories" in my EntryForm class, which I call from the view
> >> > after creating the form. This method takes in a Blog object, and
> >> > limits the queryset for the Category foreignkey to categories that
> >> > belong to that Blog. All seems good at this point.
> >> > When I actually access the form though, the behavior is pretty
> >> > random. Sometimes, it will not filter the categories at all. Other
> >> > times, if I logout and login as another user, it will retain the
> >> > category choices from the previous user. After a couple of refreshes
> >> > though, it eventually works.
> >> > I don't think I have any type of caching enabled, so I'm not sure
> >> > what's going on here.
>
> >> > Here is some of my code, hopefully enough to figure things out:
>
> >> > class EntryForm(forms.ModelForm):
> >> > class Meta:
> >> > model = Entry
> >> > fields = ('title', 'slug', 'pub_date', 'category', 'body',
> >> > 'excerpt')
> >> > # Must define category explicitly so that limit_categories() can
> >> > access it
> >> > category = forms.ModelChoiceField(queryset=Category.objects.all())
>
> >> > def limit_categories(self, blog):
> >> > # Limits the category choices to those belonging to the
> >> > current blog
> >> > print "Limiting categories"
>
> >> > self.category._set_queryset(Category.objects.filter(blog__exact=blog))
>
> >> > @login_required
> >> > def admin_entry_edit(request, entry_id):
> >> > entry = get_object_or_404(Entry, id__exact=entry_id)
> >> > if request.method == 'POST':
> >> > form = EntryForm(request.POST, instance=entry)
> >> > if form.is_valid():
> >> > form.save()
> >> > request.user.message_set.create(message="Entry saved
> >> > successfully.")
> >> > return HttpResponseRedirect('../')
> >> > else:
> >> > form = EntryForm(instance=entry)
> >> > form.limit_categories(request.user.author_set.all()[0].blog)
> >> > context = {'form': form}
> >> > return render_to_response('blogs/admin/edit.html', context,
> >> > context_instance=RequestContext(request))
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