Edit the opposite side of a many to many relationship with django generic form
- by Ed
I have two models:
class Actor(models.Model):
name = models.CharField(max_length=30, unique = True)
event = models.ManyToManyField(Event, blank=True, null=True)
class Event(models.Model):
name = models.CharField(max_length=30, unique = True)
long_description = models.TextField(blank=True, null=True)
In a previous question: http://stackoverflow.com/questions/2503243/django-form-linking-2-models-by-many-to-many-field, I created an EventForm with a save function:
class EventForm(forms.ModelForm):
class Meta:
model = Event
def save(self, commit=True):
instance = forms.ModelForm.save(self)
instance.actors_set.clear()
for actor in self.cleaned_data['actors']:
instance.actors_set.add(actors)
return instance
This allowed me to add m2m links from the other side of the defined m2m connection.
Now I want to edit the entry. I've been using a generic function:
def generic_edit(request, modelname, object_id):
modelname = modelname.lower()
form_class = form_dict[modelname]
return update_object(request,
form_class = form_class,
object_id = object_id,
template_name = 'createdit.html'
)
but this pulls in all the info except the many-to-many selections saved to this object.
I think I need to do something similar to this: http://stackoverflow.com/questions/1700202/editing-both-sides-of-m2m-in-admin-page, but I haven't figured it out.
How do I use the generic update_object to edit the other side of many-to-many link?
