I am trying to figure out the best way to have an inline formset with
a many to many relationship. Right now I am the relationship is
through a intermediate model as shown here in the docs
http://docs.djangoproject.com/en/dev/topics/db/models/#extra-fields-on-many-to-many-relationships.
It works but I am not sure the best way to do a formset for this.
Right now I am using the modelformset_factory and looping through the
results and doing a save on the intermediary model, but then it does
not update it only inserts, so I need to manually check and then add
the ID to the model instance and do a save.
This is my ugly way of doing it but it just seems wrong. Thanks.
def m2m_form(request,object_id=None):
model = get_object_or_404(Model, pk=object_id)
IntModelFormSet = modelformset_factory
(Model,form=InterModel,can_order=True,can_delete=True,extra=0)
if request.method == "POST":
form = ModelForm(request.POST, instance=model)
formset = IntModelFormSet
(request.POST,queryset=OtherModel.objects.filter(model=model))
if form.is_valid() and formset.is_valid():
instance = form.save()
for f in formset.ordered_forms:
om_instance = OtherModel.objects.get
(name=f.cleaned_data['name'])
exists = InterModel.objects.filter
(modle=model,othermodel=om_instance)
if exists is None:
inter_instance = InterModel(model=model,
othermodel=om_instance, extra=f.cleaned_data['extra'])
inter_instance.save()
else:
inter_instance = InterModel(id=exists[0].id, model
= model, othermodel=om_instance, extra=t.cleaned_data['extra'])
inter_instance.save()
return HttpResponseRedirect('/')
else:
form = ModelForm(instance=model)
formset = InterModelFormSet(queryset=OtherModel.objects.filter
(model=model))
return render_to_response('form.html',
{'form':form,'formset':formset}, context_instance=RequestContext
(request))
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com
To unsubscribe from this group, send email to
django-users+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
