inline formset only save the last form

Question

i tried many ways and searched alot(googled) but no one worked for me . whenever i save my inlineformset it only save the last form , my models.py

class Book(mo         


        

Answer 1

It is several years since I did any work on Django but I will have a go at annotating your code and adding my thoughts.

def form_valid(self,form):
    context = self.get_context_data() # This line looks fine
    context = context['book'] # You are overwriting your context here, call this 
    with transaction.atomic():
        self.object = form.save() # Your have a save here and one further down, this is also setting self object which may be incorrect.
        if context.is_valid():
            context.instance = self.object
            context.save()
    return super(CreateBookView,self).form_valid(form)

Like I said, I haven't done any Django in several years, so I am just referring to some of my old code (which may be outdated) from https://github.com/timhughes/django-cbv-inline-formset/blob/master/music/views.py#L26 which I will annotate with comments.

def form_valid(self, form):
    context = self.get_context_data(form=form)  # Get the context data for the form in question.
    formset = context['track_formset']  # Extract the formset out of the context.
    if formset.is_valid():  # Validate the formset is valid
        response = super().form_valid(form)  # Call the parent class's form_valid.
        formset.instance = self.object  # Set the formsets type (instance of self.object) so that django knows how to save it.
        formset.save()  # Save the formset here
        return response  # Send a response to the user
    else:
        return super().form_invalid(form) # Send a response to the user with invalid form information.