正如标题所说，当我尝试使用具有多个子模型的父模型的 UpdateView 来更新它们时，而不是简单地更新它们，它会创建新对象而不是更新它们。我不应该对表单、模型或任何东西有问题，因为其他一切都在工作，我可以编辑父模型，但问题似乎出在我的views.py的 form_valid() 方法上。以下是相关代码：
（Entrada = 父模型，BalaMateriesPrimeres = 多个子模型）
class EntradaUpdateView(LoginRequiredMixin, UpdateView):
model = Entrada
fields = [...]
template_name_suffix = '_update'
def form_valid(self, form):
self.object = self.get_object()
form_class = self.get_form_class()
form = self.get_form(form_class)
qs = BalaMateriesPrimeres.objects.filter(num_entrada=self.get_object())
formsets = BalaMateriesPrimeresFormSet(self.request.POST, queryset=qs)
if form.is_valid():
form.save()
if formsets.is_valid():
instances = formsets.save(commit=False)
for instance in instances:
instance.instance = self.object
instance.num_entrada = Entrada.objects.get(pk=self.object.id)
instance.save()
return super(EntradaUpdateView, self).form_valid(form)
编辑：我也尝试过的事情：
这也复制了对象
self.object = self.get_object() form_class = self.get_form_class() form = self.get_form(form_class) qs = BalaMateriesPrimeres.objects.filter(num_entrada=self.get_object()) formsets = BalaMateriesPrimeresFormSet(self.request.POST, queryset=qs) if form.is_valid(): form.save() if formsets.is_valid(): instances = formsets.save(commit=False) for instance in instances: instance.instance = self.object instance.num_entrada = Entrada.objects.get(pk=self.object.id) instance.save()这只是不保存任何东西：
self.object = self.get_object() form_class = self.get_form_class() form = self.get_form(form_class) qs = BalaMateriesPrimeres.objects.filter(num_entrada=self.get_object()) formsets = BalaMateriesPrimeresFormSet(self.request.POST, queryset=qs) if form.is_valid(): form.save() for formset in formsets: if formsets.is_valid(): formset.instance = self.object formset.num_entrada = self.object.id print(formset.instance) formset.save()好像我错过了一块拼图，但我不知道是什么