When I try to save my inline formset it just returns an empty list and no changes are reflected in the database. I have tried doing it with no option and commit=False but they both have the same result. I know there is data because I printed the formset as a table, and I know it is valid because the property is_valid() method returns true. Here is the code:
def edit(request):
if request.method == 'POST':
print(request.POST)
form = TombstoneForm(request.POST)
print(form.is_valid())
t = form.save(commit=False)
t.edit_date = datetime.now()
t.user_editor = request.user
t.save()
print(t)
formset_construct = inlineformset_factory(Tombstone, Tank, form=TombstoneForm)
formset = formset_construct(request.POST)
print("Passed the inline formset")
print(formset.as_table())
print(formset.is_valid())
l = formset.save()
print(l)
return render(request, 'main.html')
So I believe I have found the source of my problem and a workaround. The problem was occuring in the BaseModelFormSet class in this method:
def save_existing_objects(self, commit=True):
self.changed_objects = []
self.deleted_objects = []
if not self.initial_forms:
return []
saved_instances = []
forms_to_delete = self.deleted_forms
for form in self.initial_forms:
obj = form.instance
# If the pk is None, it means either:
# 1. The object is an unexpected empty model, created by invalid
# POST data such as an object outside the formset's queryset.
# 2. The object was already deleted from the database.
if obj.pk is None:
continue
if form in forms_to_delete:
self.deleted_objects.append(obj)
self.delete_existing(obj, commit=commit)
elif form.has_changed():
self.changed_objects.append((obj, form.changed_data))
saved_instances.append(self.save_existing(form, obj, commit=commit))
if not commit:
self.saved_forms.append(form)
return saved_instances
The problem was occuring in:
if obj.pk is None:
continue
Where it was always hitting continue, so my solution has just been to save the individual form data instead of the formset data:
for form in formset:
val = form.save(commit=False)
val.Vessel = t
val.save()
