Called after the form has validated.

def handle_valid(self, form=None, *args, **kwargs):
        """
        Called after the form has validated.
        """
        # Take a chance and try save a subclass of a ModelForm.
        if hasattr(form, 'save'):
            form.save()
        # Also try and call handle_valid method of the form itself.
        if hasattr(form, 'handle_valid'):
            form.handle_valid(*args, **kwargs)