django update/create view old values

Asked Oct 08 '15 at 13:09

Active Oct 08 '15 at 13:27

Viewed 159 times

i have a ModelForm that i use as the form_class for both of the views.

in both cases i need to update a different model before i save the object of

the views. i.e. i use the views to create/update model A and i need to update

model B based on the A object.

my problems are:

in the model form i don't know if it create or update in the save method
i don't know the old values of the fields in case of an update

anyone know how i can solve this?

update:

class updateA(UpdateView):
    model = A
    form_class = AForm

class createA(CreateView):
    model = A
    form_class = AForm

class AForm(ModelForm):
    a = super(AForm, self).save(commit=False)
    if commit:
        a.save()
    return log

edited Oct 08 '15 at 13:27

asked Oct 08 '15 at 13:09

brad

could you include some code? – grrrrrr Oct 08 '15 at 13:18
It's your view method to determine if current action is a create or an update, not the form. I don't understand why you try to look at the `save()` method and determine that. – Shang Wang Oct 08 '15 at 13:50
how can i get the saved object in the view? or to know the old values of the object if update? – brad Oct 08 '15 at 14:03
found it.. in form_valid of the view in the changed_data – brad Oct 08 '15 at 14:11

django update/create view old values

0 Answers0