django - 升级到 django-rest-framework 3 后出现 UnicodeDecodeError

Question

在 django-rest-framework 2 下，以下工作正常:

from rest_framework import rest_response, generics
from rest_framework.renderers import JSONRenderer, BrowsableAPIRenderer

class SomeView(generics.GenericAPIView):
    renderer_classes = JSONRenderer, BrowsableAPIRenderer

    def get(self, request, *args, **kwargs):
        ... 
        # Build a response dict with non-ascii in it
        ...
        return rest_response.Response(some_dict_with_non_ascii_in_it_somewhere)

我不必显式编码任何非 ascii...

但是，升级到 DRF 3 后，相同的代码现在会引发以下错误:

Traceback (most recent call last):
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/django/contrib/staticfiles/handlers.py", line 63, in __call__
    return self.application(environ, start_response)
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/whitenoise/base.py", line 119, in __call__
    return self.application(environ, start_response)
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 189, in __call__
    response = self.get_response(request)
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/django/core/handlers/base.py", line 218, in get_response
    response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/django/core/handlers/base.py", line 261, in handle_uncaught_exception
    return debug.technical_500_response(request, *exc_info)
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/django_extensions/management/technical_response.py", line 5, in null_technical_500_response
    six.reraise(exc_type, exc_value, tb)
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/django/core/handlers/base.py", line 164, in get_response
    response = response.render()
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/django/template/response.py", line 158, in render
    self.content = self.rendered_content
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/rest_framework/response.py", line 71, in rendered_content
    ret = renderer.render(self.data, media_type, context)
  File "/Users/troy/.virtualenvs/publisher/lib/python2.7/site-packages/rest_framework/renderers.py", line 104, in render
    separators=separators
  File "/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/__init__.py", line 250, in dumps
    sort_keys=sort_keys, **kw).encode(obj)
  File "/usr/local/Cellar/python/2.7.6/Frameworks/Python.framework/Versions/2.7/lib/python2.7/json/encoder.py", line 210, in encode
    return ''.join(chunks)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 671: ordinal not in range(128)

我猜测 DRF 3 现在在某个地方有一些新的配置值，这是 DRF 2 下的默认值。我已尝试将 REST_FRAMEWORK UNICODE_JSON 设置设置为 True ，但我仍然遇到同样的错误...

是否有一个设置可以使该作品表现得像 DRF 2 那样？或者 DRF 3 是否需要我在字典中查找非 ASCII 字符并手动对其进行编码？

Answer 1

我找到了答案。

在 DRF 2 中，rest_framework.JSONRenderer.ensure_ascii 设置为 True。在 DRF 3 中，rest_framework.JSONRenderer.ensure_ascii 设置为 not api_settings.UNICODE_JSON (我之前错过了 not ，当时我编写了问题...)。

因此，为了让它表现得像 DRF 2，我需要将“UNICODE_JSON”设置为 False 而不是 True，就像我之前尝试过的那样(它是 True默认情况下):

REST_FRAMEWORK = {
    ...
    'UNICODE_JSON': False
}

当然，我也可以对字典值进行编码，这在许多情况下可能是更好的选择。