Question

实现了内联formset

我在保存formset时遇到问题，它不会删除记录

我们可以将其追踪到DEFINED_PORT：

formsets save method

如果我们深入研究def form_valid(self, form): '''Handle saving of the project membership formset ''' context = self.get_context_data() project_memberships = context['projectmembership_formset'] if project_memberships.is_valid(): self.object = form.save() project_memberships.instance = self.object project_memberships.save()方法，我们就会：

save

我发现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的{{1}}为空，因此不会发生删除。

pk数据：

obj

为什么对象没有POST且未被删除？

Answer 1

根据Class based viewINline formset

的答案

get_context_data中包含POST数据的UpdateView也需要获得一个实例。

if self.request.POST:
            context['projectmembership_formset'] = ProjectMembershipFormSet(
                self.request.POST,
                instance=self.object
            )

Django内联formset不删除没有pk的中间模型？

1 个答案: