Save Many-To-Many Field Django Forms

Question

I have a Many-To-Many relationship between a Course and Tutor model. I am trying to make it so that when you use a form to create a record for a new Tutor, you can select th

Answer 1

Updated answer

The problem is in save method. You save instance with commit=False but your instance saved when if commit: so it's not saving now.

Just commented out if commit: and it will be saved well.

def save(self, commit=True):
    # Get the unsaved Pizza instance
    instance = forms.ModelForm.save(self, False)

    # Prepare a 'save_m2m' method for the form,
    old_save_m2m = self.save_m2m

    def save_m2m():
        old_save_m2m()
        # This is where we actually link the pizza with toppings
        instance.course_set.clear()
        for course in self.cleaned_data['courses']:
            instance.course_set.add(course)

    self.save_m2m = save_m2m

    # Do we need to save all changes now?
    # Just like this
    # if commit:
    instance.save()
    self.save_m2m()

    return instance