Django class based views - UpdateView with two model forms - one submit

You should be able to use the "instance" kwarg for the instantiation of the form from an existing model if that's what you need. Example:

context['form'] = self.form_class(self.request.GET, instance=request.user)

Try to quit the self.request.get on get_content_data forms constructors and use the "object" variable. With that get you reinitialize the constructor, more in this link.

My code:

 context['form'] = self.form_class(instance=self.object)