未提供异常消息（Django REST POST）

Question

我使用的是Django 1.6和Django REST框架。

我的看法很简单。出于演示目的，我希望它在收到GET请求时返回所有用户的电子邮件地址，在收到POST请求时返回相同的地址。

这是我正在使用的代码：

from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import authentication, permissions
from core import models

class ListUsers(APIView):
    def get(self, request, format=None):
        usernames = [user.email for user in models.User.objects.all()]
        return Response(usernames)

    def post(self, request):
        usernames = [user.email for user in models.User.objects.all()]
        return Response(usernames)

当我得到它的工作很好，但当我做了张贴我得到这个错误： No exception message supplied

我不知道问题出在哪里，我已经尝试了我能想到的一切，我已经搜索了Django REST框架文档，但什么也找不到。

任何帮助都非常感谢。提前谢谢。

更新 要求的堆栈跟踪： 环境：

Request Method: POST
Request URL: http://localdev:1989/api/rest/v1/register

Django Version: 1.6
Python Version: 2.7.3
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'rest_framework',
 'core',
 'apiv1')
Installed Middleware:
('django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware')


Traceback:

File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
  139.                 response = response.render()
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/django/template/response.py" in render
  105.             self.content = self.rendered_content
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/rest_framework/response.py" in rendered_content
  59.         ret = renderer.render(self.data, media_type, context)
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/rest_framework/renderers.py" in render
  577.         context = self.get_context(data, accepted_media_type, renderer_context)
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/rest_framework/renderers.py" in get_context
  554.             'post_form': self.get_rendered_html_form(view, 'POST', request),
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/rest_framework/renderers.py" in get_rendered_html_form
  423.             data = request.DATA
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/rest_framework/request.py" in DATA
  197.             self._load_data_and_files()
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/rest_framework/request.py" in _load_data_and_files
  267.             self._data, self._files = self._parse()
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/rest_framework/request.py" in _parse
  359.         parsed = parser.parse(stream, media_type, self.parser_context)
File "/usr/local/virtualenvs/wedding/local/lib/python2.7/site-packages/rest_framework/parsers.py" in parse
  63.             raise ParseError('JSON parse error - %s' % six.text_type(exc))

Exception Type: ParseError at /api/rest/v1/register
Exception Value: 

我发现这是由于提交的JSON不正确造成的。例如，如果我有一个额外的逗号。如何使此返回错误消息而不是此500错误？

更新2 发布数据：

{
 "email": "my@email.com",
 "full_name": "mark winterbottom",
 "password": "2secure4u",
}

Answer 1

如果您想要一个通用的错误页面，您应该能够在url.py中设置handler500 url handler。我还注意到您不接受post方法的格式kwarg。你可能想把它加进去。

另一种可能是重写视图类的dispatch方法并在那里捕获异常，ala：

class ListUsers(APIView):
    def dispatch(self, *args, **kwargs):
        try:
            return super(ListUsers, self).dispatch(*args, **kwargs)
        except ParseError:
            pass
            # Show an error page

    def get(self, request, format=None):
        usernames = [user.email for user in models.User.objects.all()]
        return Response(usernames)

    def post(self, request):
        usernames = [user.email for user in models.User.objects.all()]
        return Response(usernames)