Question

如果不允许删除该对象，我试图从DRF返回405响应，但我一直收到响应204_NO_CONTENT。即使没有删除该实例并且if语句也可以正常工作，返回的响应也不正确。我在这里做什么错了？

这是我的代码：

def perform_destroy(self, instance):
    if not instance.deletable:
        return Response({'error_message': 'Cannot delete last journal entry line.'}, status=status.HTTP_405_METHOD_NOT_ALLOWED)
    sje_id = instance.journal_entry.id
    instance.delete()
    sje = PurchaseJournalEntry.objects.get(pk=sje_id)
    sje.regenerate_mutations()
    sje.save()

Answer 1

perform_destroy [drf-doc]不应返回HTTP响应。它只是应该删除对象，而不返回响应。如果返回响应，则将其忽略。

不过，您可以覆盖destroy [drf-doc]函数，例如：

def destroy(self, request, *args, **kwargs):
    instance = self.get_object()
    if not instance.deletable:
        return Response({'error_message': 'Cannot delete last journal entry line.'}, status=status.HTTP_405_METHOD_NOT_ALLOWED)
    self.perform_destroy(instance)
    return Response(status=status.HTTP_204_NO_CONTENT)

Answer 2

perform_destroy不应该返回任何内容。

如果要更改此设置，则应覆盖视图的destroy或引发适当的异常：

from rest_framework.exceptions import MethodNotAllowed

def perform_destroy(self, instance):
    if not instance.deletable:
        raise MethodNotAllowed(default_detail='Cannot delete last journal entry line.')
    sje_id = instance.journal_entry.id
    instance.delete()
    sje = PurchaseJournalEntry.objects.get(pk=sje_id)
    sje.regenerate_mutations()
    sje.save()

Django Rest Framework不会从条件中返回响应代码

2 个答案: