Limit Django's inlineformset_factory to only create new objects

Question

I am using django\'s inline formset factory. To use the example in the docs,

author = Author.objects.get(pk=1)
BookFormSet = inlineformset_factory(Author, Book)         


        

Answer 1

Based on Jeremy Lewis and if you don't want to subclass BaseInlineFormSet, you can just give an empty queryset parameter to your BookFormSet.

See pseudo (untested) Django 1.6 code sample:

BookFormSet = inlineformset_factory(parent=Author, model=Book)
if request.method == "POST":
    formset = BookFormSet(request.POST, request.FILES, instance=author)
    if formset.is_valid():
        formset.save()
else:
    queryset = Book.objects.none() # does not allow to edit books
    formset = BookFormSet(instance=project, initial=initial, queryset=queryset)
return render(request, "add_book.html", { "formset": formset, })