session.py 文件源码

def get_form_and_formset(
    request: HttpRequest=None, extra: int=1, initial_form: SessionBaseForm=None,
    initial_formset=None
) -> Tuple[SessionBaseForm, Any]:
    ItemMovementFormSet = forms.formset_factory(ItemMovementForm, extra=extra)

    if request:
        form = SessionBaseForm(request.POST, prefix='session')
        formset = ItemMovementFormSet(request.POST, prefix='items')
    elif initial_form or initial_formset:
        form = SessionBaseForm(initial=initial_form, prefix='session')
        formset = ItemMovementFormSet(initial=initial_formset, prefix='items')
    else:
        form = SessionBaseForm(prefix='session')
        formset = ItemMovementFormSet(prefix='items')
    return form, formset