Django, adding excluded properties to the submitted modelform

Question

I\'ve a modelform and I excluded two fields, the create_date and the created_by fields. Now I get the \"Not Null\" error when using the save()

Answer 1

Pass a user as a parameter to form constructor, then use it to set created_by field of a model instance:

def add_location(request):
    ...
    form = LocationForm(user=request.user)
    ...

class LocationForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        user = kwargs.pop('user')
        super(forms.ModelForm, self).__init__(*args, **kwargs)
        self.instance.created_by = user