Django Rest Framework：异常处理程序不起作用答案

【问题标题】：Django Rest Framework: Exception handler not workingDjango Rest Framework：异常处理程序不起作用
【发布时间】：2020-06-10 20:25:59
【问题描述】：

Django Rest Framework 异常处理程序似乎对我不起作用。 ValidationErrors 正在变成 500 个响应。

当 ValidationError 被提升时，它不会被转换为 400。

Traceback (most recent call last):
  File "/example/.local/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/example/.local/lib/python3.6/site-packages/django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/example/.local/lib/python3.6/site-packages/django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/example/.local/lib/python3.6/site-packages/django/views/generic/base.py", line 71, in view
    return self.dispatch(request, *args, **kwargs)
  File "/example/.local/lib/python3.6/site-packages/django/views/generic/base.py", line 97, in dispatch
    return handler(request, *args, **kwargs)
  File "/example/app/views.py", line 25, in post
    serializer.is_valid(raise_exception=True)
  File "/example/.local/lib/python3.6/site-packages/rest_framework/serializers.py", line 242, in is_valid
    raise ValidationError(self.errors)
rest_framework.exceptions.ValidationError: {'email': [ErrorDetail(string='Enter a valid email address.', code='invalid')]}
[26/Feb/2020 20:44:54] "POST /login/ HTTP/1.1" 500 84465

在settings.py我有

INSTALLED_APPS = [
    # ...
    'rest_framework',
]

但无论我的INSTALLED_APPS 中是否有rest_framework，我都会得到相同的行为。

将此添加到settings.py 也无效：

REST_FRAMEWORK = {
    'EXCEPTION_HANDLER': 'bla',
}

我是否遗漏了一些明显的东西？

【问题讨论】：

标签： django-rest-framework

【解决方案1】：

事实证明，这取决于您在抛出异常时子类化的视图。

我在子类化View，但不起作用：

from rest_framework import views
from rest_framework.exceptions import ValidationError


class LoginView(views.View):
    def post(self, request):
        raise ValidationError()

改用GenericAPIView 解决了我的问题：

from rest_framework import generics
from rest_framework.exceptions import ValidationError


class LoginView(generics.GenericAPIView):
    def post(self, request):
        raise ValidationError()

【讨论】：