我如何在Django rest框架中覆盖perform_destroy方法？ [英] How would I override the perform_destroy method in django rest framework?

问题描述

DRF当前具有的功能可以在数据库中不存在对象时抛出404。例如

DRF currently has functionality that throws a 404 if an object doesn't exist in the db. For example

Request: /delete/1234
Response: 204 (success)
Request 2: /delete/1234
Response: 404 (not found)

此逻辑对我来说很成问题移动应用程序，我想对其进行更改，以便覆盖404（未找到）功能。换句话说，我希望我的要求是幂等的。例如：

This logic is very problematic for my mobile apps and i would like to change it so that I override the 404-not-found functionality. In other words, I want my request to be idempotent. For example:

Request: /delete/1234
Response: 204 (success)
Request 2: /delete/1234
Response: 204 (success)

我一直在寻找docs，但我不太确定如何重写 get_object_or_404 功能。

I've been looking at the docs but i'm not really sure how to override the get_object_or_404 functionality.

推荐答案

我相信，如果没有要删除的对象，理想情况下，它应该像DRF一样返回404。

I believe, if there is no object to delete, ideally it should return 404 as DRF does.

对于您的要求，以下内容代码将达到目的：

For your requirement the following code will do the trick:

from rest_framework import status,viewsets
from rest_framework.response import Response
from django.http import Http404

 class ExampleDestoryViewset(viewset.ModelViewSet):
    def destroy(self, request, *args, **kwargs):
        try:
            instance = self.get_object()
            self.perform_destroy(instance)
        except Http404:
            pass
        return Response(status=status.HTTP_204_NO_CONTENT)

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