django modelformset_factory - how to add a field in the view after commit=False + ignore empty forms

Question

Hi,

I create a FormSet with modelformset_factory.

HourRecordFormSet = modelformset_factory(HourRecord, max_num=6, extra=3, form=HourRecordBatchForm)

Then I want to set the project field of a certain HourRecord object to the actual project. This should be done in the view. I tried it like this.

if hour_record_formset_january.is_valid():
            #hour_record_formset_january.save()
            for form in hour_record_formset_january.forms:
                if form:
                    hour_record = form.save(commit=False)
                    hour_record.project = project
                    hour_record.save()

You see I commented out the hour_record_formset_january.save() since I want to add first the project to the hour_record object. This works fine. But for the extra forms I have a problem, since if they are not filled out I get an error.

Thus I want to save only the hour_record objects where at least only one field is filled out. This would be done with hour_record_formset_january.save(), but then I can not initialise another field.

I can not use a inlineformset_factory, since I have to call the HourRecordFormSet with a specific queryset. I do it like this:

january_qs = HourRecord.objects.filter(who_worked=get_current_user(), project=project, date_of_work__year=year, date_of_work__month=1)
    hour_record_formset_january = HourRecordFormSet(queryset=january_qs)