我正在尝试在Django中创建逻辑，以在保存模型本身之前检查是否所有<项目都已保存。这是我正在使用的代码：
TabularInline当条件 def save_formset(self, request, form, formset, change):
instances = formset.save(commit=False)
for instance in instances:
item_count_in_origin = instance.prc_item.quantity
print(item_count_in_origin)
if instance.quantity > item_count_in_origin:
messages.error(request, 'Quantity is higher than origin branch.')
return
else:
for item in instances:
if item.id is not None:
item.close()
else:
formset.save()
def save_model(self, request, obj, form, change):
if obj.transfer_items.all().count() != 0:
user = request.user
if self.save_formset:
if not change:
obj.solicitor = user
obj.date_solicited = datetime.now()
created_status = Status.objects.get(name=StatusEnum.CREATED)
obj.status = created_status
return super(TransferenceAdmin, self).save_model(request, obj, form, change)
else:
messages.error(request, 'Quantity is higher than origin branch.')
return
起作用时，它会正确运行并返回一个错误，但是当条件为假时，我们进入
if instance.quantity > item_count_in_origin:它失败，并显示错误 for item in instances:
if item.id is not None:
item.close()
else:
formset.save()
更新
我将save() prohibited to prevent data loss due to unsaved related object 'xxxxxxxx'.更改为if item.id is not None:，以确保if item.id is None:仅在打开的实例上运行，而不在已保存的实例上运行。
错误变成item.close()，我认为这是关闭打开实例的错误方法。