基于JSONField嵌套对象的Django-Rest框架过滤器

Question

我正在使用Python（3）、Django（1.11）和DRF开发一个项目，在这个项目中，我必须基于在db模型中保存为JSONFIELD的json对象字段来过滤数据。在

以下是我尝试过的：

# model.py

from django.db import models
import jsonfield

class MyModel(models.Model):
    id = models.CharField(primary_key=True, max_length=255)
    type = models.CharField(max_length=255)
    props = jsonfield.JSONField()
    repo = jsonfield.JSONField()
    created_at = models.DateTimeField()

^{pr2}$

# JSON object
{
  "id":4633249595,
  "type":"PushEvent",
  "props":{
    "id":4276597,
    "login":"iholloway",
    "avatar_url":"https://avatars.com/4276597"
  },
  "repo":{
    "id":269910,
    "name":"iholloway/aperiam-consectetur",
    "url":"https://github.com/iholloway/aperiam-consectetur"
  },
  "created_at":"2016-04-18 00:13:31"
}

# views.py

class PropsEvents(generics.RetrieveAPIView):
    serializer_class = MyModelSerializer

    def get_object(self):
        print(self.request.parser_context['kwargs']['id'])
        queryset = MyModel.objects.filter(data__props__id=self.request.parser_context['kwargs']['id'])
        obj = get_object_or_404(queryset)
       return obj

It should return the MyModel records by props ID and should be able to return the JSON array of all the MyModel objects where the props ID by the GET request at /mymodel/props/<ID>. If the requested props does not exist then HTTP response code should be 404, otherwise, the response code should be 200. The JSON array should be sorted in ascending order by MyModel ID.

当我向该视图发送请求时，它返回一个错误：

> django.core.exceptions.FieldError: Unsupported lookup 'id' for JSONField or join on the field not permitted.
> [18/Feb/2019 10:37:39] "GET /events/actors/2790311/ HTTP/1.1" 500 16210

那么，如何根据id of props过滤对象呢？在

请帮帮我！ 提前谢谢！在

Answer 1

你应该用

from django.contrib.postgres.fields import JSONField

而不是

^{pr2}$

在那之后，我认为一切都应该正常运转