Sending request.user object to ModelForm from class based generic view in Django

Question

So, my goal is to be able to filter a ModelChoiceField queryset in my ModelForm to only include Places that request.user has created.

My ModelForm is simply:

Answer 1

I'm on an iPhone, but do this:

def get_form(self, form_class):
     form = super(MyView, self).get_form(form_class)
     form.fields['place'].querset = Place....
     return form

Wow that was hard! No indention support!

Answer 2

To update Yuji's answer for Django 1.10+ (including Django 2.0+), see the example below (note the updated method signature). Yuji's suggested approach keeps the queryset in the view along with the other business logic, and helps keep any form class extending models.ModelForm clean and straightforward.

def get_form(self, form_class=None):
    if form_class is None:
        form_class = self.get_form_class()
    form = super(MyView, self).get_form()
    form.fields['place'].queryset = Place.objects.filter(created_by=self.request.user)
    return form

Shorter:

def get_form(self, form_class=None):
    form = super(MyView, self).get_form(form_class)
    form.fields['place'].queryset = Place.objects.filter(created_by=self.request.user)
    return form

Answer 3

You need to pop key user from kwargs in PlaceEventForm.__init__() method, to prevent it from going to ModelForm.__init__() method:

views.py:

class PlaceEventFormView(CreateView):
    form_class = PlaceEventForm
    template_name = 'events/event_create.html'

    @method_decorator(login_required)
    def dispatch(self, *args, **kwargs):
        return super(PlaceEventFormView, self).dispatch(*args, **kwargs)

    def get_form_kwargs(self):
        kwargs = super(PlaceEventFormView, self).get_form_kwargs()
        kwargs.update({'place_user': self.request.user})
        return kwargs

forms.py:

class PlaceEventForm(models.ModelForm):
    class Meta:
        model = Event

    def __init__(self, *args, **kwargs):
        user = kwargs.pop('place_user')
        # now kwargs doesn't contain 'place_user', so we can safely pass it to the base class method
        super(PlaceEventForm, self).__init__(*args, **kwargs)
        self.fields['place'].queryset = Place.objects.filter(created_by=user)