routers.py 文件源码

def get_api_root_view(self):
        # callgraph:
        # HybridRouter.get_urls
        # DefaultRouter.get_urls
        # HybridRouter.get_api_root_view

        # Copy the following block from Default Router
        api_root_dict = {}
        list_name = self.routes[0].name
        for prefix, viewset, basename in self.registry:
            api_root_dict[prefix] = list_name.format(basename=basename)

        # In addition to that:
        api_view_urls = self._api_view_urls

        class APIRoot(views.APIView):
            _ignore_model_permissions = True

            def get(self, request, *args, **kwargs):
                ret = OrderedDict()
                namespace = request.resolver_match.namespace
                for key, url_name in api_root_dict.items():
                    if namespace:
                        url_name = namespace + ':' + url_name
                    try:
                        ret[key] = reverse(
                            url_name,
                            args=args,
                            kwargs=kwargs,
                            request=request,
                            format=kwargs.get('format', None)
                        )
                    except NoReverseMatch:
                        # Don't bail out if eg. no list routes exist, only detail routes.
                        continue

                # In addition to what had been added, now add the APIView urls
                for api_view_key in api_view_urls.keys():
                    # originally was: reverse(api_view_urls[api_view_key].name, request=request, format=format)
                    namespace = request.resolver_match.namespace
                    if namespace:
                        url_name = namespace + ":" + api_view_key
                    try:
                        ret[api_view_key] = reverse(
                            url_name,
                            args=args,
                            kwargs=kwargs,
                            request=request,
                            format=kwargs.get('format', None)
                        )
                    except NoReverseMatch:
                        continue

                return response.Response(ret)

        return APIRoot.as_view()