Question

我ViewSet SearchFilter filter_backends中有{ [{ "username": "jonh"; }, { "fullname": "Jonh"; }, { "username": "jo"; }, { "fullname": "Johnson"; } ] }和两个search_fields。如何返回JSON代表唯一的字段结果？例如，如果我使用＆＃34; jo＆＃34;发送搜索响应。 substring我只有一个字段用于此搜索（资助的用户名或全名），而不是每个JSON对象中的用户名和电子邮件：

class UserViewSet(mixins.RetrieveModelMixin,
                  mixins.UpdateModelMixin,
                  mixins.ListModelMixin,
                  viewsets.GenericViewSet):

    queryset = User.objects.all()
    permission_classes = (IsUserOrReadOnly,)
    filter_backends = (filters.SearchFilter,)
    search_fields = ('^username', '^fullname',)

    def get_serializer_class(self):
        if hasattr(self, 'action') and self.action == 'list':
            return UserListSerializer
        return UserDetailSerializer

viewsets.py：

class UserListSerializer(serializers.ModelSerializer):

    class Meta:
        model = User
        fields = ('id', 'username', 'email', 'fullname')

serializers.py：

    public async Task InsertEdgesByName(List<string> nodeListA, List<string> nodeListB,
        List<int> weightList, string type)
    {
        for (var i = 0; i < nodeListA.Count; i += 200)
        {
            using (var sw = new StreamWriter(File.OpenWrite($"tempEdge-{type}.csv")))
            {
                sw.Write("From,To,Weight\n");
                for (var j = i; 
                    j < i + 200 & 
                    j < nodeListA.Count; 
                    j++)
                {
                    sw.Write($"{nodeListA[j]}," +
                             $"{nodeListB[j]}," +
                             $"{weightList[j]} + id:{j}" +
                             $"\n");
                }
            }
            var f = new FileInfo($"tempEdge-{type}.csv");

            await Client.Cypher
                .LoadCsv(new Uri("file://" + f.FullName), "rels", true)
                .Match("(from {label: rels.From}), (to {label: rels.To})")
                .Create($"(from)-[:{type} {{weight: rels.Weight}}]->(to);")
                .ExecuteWithoutResultsAsync();

            _logger.LogDebug($"{DateTime.Now}\tEdges inserted\t\tedges inserted: {i}");
        }
    }

Answer 1

我会创建一个Serializer工厂函数，它将搜索参数作为参数：

def generate_user_list_serializer(search_terms):

    class UserListSerializer(serializers.ModelSerializer):

        class Meta:
            model = User
            fields = tuple(search_terms)

    return UserListSerializer

然后在您的视图中，让动态生成序列化程序：

def get_serializer_class(self):

    # make sure that the fields are available
    validated_params = [p for p in self.query_params if p in Myfields]

    return generate_user_list_serializer(self.query_params)

仅返回受资助的字段作为响应（Django Rest SearchFilter）

1 个答案: