Django REST framework : how to wrap the response with extra fields . ... 并在数据字段中提供当前响应

Question

所以，我有以下几点:

class ObjectViewSet(
    mixins.CreateModelMixin,
    mixins.ListModelMixin,
    mixins.RetrieveModelMixin,
    mixins.DestroyModelMixin,
    viewsets.GenericViewSet
):
    """
    REST API endpoints for Objects.
    """
    serializer_class = ObjectSerializer
    queryset = Object.objects.all()

例如，这将返回一个列表 GET要求:

[
    {
        "uuid": "787573a2-b4f1-40df-9e3a-8555fd873461",
    },
    {
        "uuid": "2ab56449-1be1-47d7-aceb-a9eaefa49665",
    }
]

但是，我怎样才能稍微改变这种混合的响应，使其类似于以下内容:

{
    success: true,
    message: 'Some Extra Useful Message',
    data: [
        {
             "uuid": "787573a2-b4f1-40df-9e3a-8555fd873461",
        },
        {
             "uuid": "2ab56449-1be1-47d7-aceb-a9eaefa49665",
        }
    ]
}

这是可能的，还是我应该编写自己的自定义端点 Response()并且不使用 DRF mixins能力？

所以，基本上，切换自定义:

Response(data, status=None, template_name=None, headers=None, content_type=None)

到:

response = {
    'success': true,
    'message': 'Some Extra Useful Message',
    'data': serializer.data
}

Response(response, status=None, template_name=None, headers=None, content_type=None)

Answer 1

您可以使用 Middelwares 处理此响应格式。 .如果基于状态代码你有一个固定的响应格式，那么编写一个中间件。

class ResponseFormatMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        response = self.get_response(request)
        try:
            if (not getattr(response, 'error', False)) and (isinstance(response.data, dict) or isinstance(response.data, list)):
                response.data = {'success': True, 'message':'some message','data': response.data}
        except AttributeError:
            pass
        return response

中间件写在 CustomMiddleware模块为 middleware.py ， 然后加

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'CustomMiddleware.middleware.ResponseFormatMiddleware', # Added this line
]

在 settings.py文件。