Django Rest Framework - 通过传递 JSON 对象而不仅仅是 ID 来执行 Put 请求

Question

我正在使用 Python(3)、Django(1.11) 和 DRF(3.6) 开展一个项目，其中我必须通过传递 nested nested 而不是 ID 来执行 PUT 请求。

这是我尝试过的：

models.py:

class Actor(models.Model):
    id = models.CharField(primary_key=True, max_length=255)
    login = models.CharField(max_length=255)
    avatar_url = models.URLField(max_length=500)


class Repo(models.Model):
    id = models.CharField(primary_key=True, max_length=255)
    name = models.CharField(max_length=255)
    url = models.URLField(max_length=500)


class Event(models.Model):
    id = models.CharField(primary_key=True, max_length=255)
    type = models.CharField(max_length=255)
    actor = models.ForeignKey(Actor, related_name='actor')
    repo = models.ForeignKey(Repo, related_name='repo')
    created_at = models.DateTimeField()

serializers.py:

class ActorSerializer(serializers.ModelSerializer):
    class Meta:
        model = Actor
        fields = ('id', 'login', 'avatar_url')


class RepoSerializer(serializers.ModelSerializer):
    class Meta:
        model = Repo
        fields = ('id', 'name', 'url')


class EventModelSerializer(serializers.ModelSerializer):
    actor = ActorSerializer(many=False)
    repo = RepoSerializer(many=False)

    class Meta:
        model = Event
        fields = ('id', 'type', 'actor', 'repo', 'created_at')
        depth = 1

    def create(self, validated_data):
        return Event.objects.create(**validated_data)

更新：当我提交带有以下对象的发布请求时：

{
  "id":ID,
  "type":"PushEvent",
  "actor":{
    "id":ID,
    "login":"daniel33",
    "avatar_url":"https://avatars.com/2790311"
  },
  "repo":{
    "id":ID,
    "name":"johnbolton/exercitationem",
    "url":"https://github.com/johnbolton/exercitationem"
  },
  "created_at":"2015-10-03 06:13:31"
}

它返回此错误为：TypeError: 'ValueError: Cannot assign "OrderedDict([('id', '2790311'), ('login', 'daniel33'), ('avatar_url', 'https://avatars.com/2790311')])": "Event.actor" must be a "Actor" instance.

views.py:

class Actor(generics.GenericAPIView):
    serializer_class = EventModelSerializer
    queryset = EventModel.objects.all()

    def update(self):
        actor = EventModel.objects.filter(actor_id=self.request.data('id'))
        print(actor)
        return HttpResponse(actor)

Sample Input Object:

{
  "id":3648056,
  "login":"ysims",
  "avatar_url":"https://avatars.com/modified2"
}

要求是： 更新actor的头像URL：服务应该能够通过/actors的PUT请求更新演员的头像URL。演员 JSON 在请求正文中发送。如果具有 id 的参与者不存在，则响应代码应为404，或者如果该参与者有其他字段正在更新，则 HTTP 响应代码应为 400，否则，响应代码应为 @987654338 @.**

我有点困惑如何在没有的情况下执行PUT 请求 传递ID?

Answer 1

我看到你今天提出的两三个问题。我想你问错问题了。我认为您需要的是三个模型Event、actor 和repo。 event 模型有两个外键字段actor 和repo。现在您希望它更新 actor 模型的 avtar_url 字段。好吗？

class Actor(models.Model):
        avtar_url = models.CharField(max_length=255)
       # Other Fields

class Repo(models.Model):
       # Other Fields

class EventModel(models.Model):
        id = models.CharField(primary_key=True, max_length=255)
        type = models.CharField(max_length=255)
        actor = models.ForaignKey(Actor)
        repo = models.ForaignKey(Actor)
        created_at = models.DateTimeField()

现在创建和更新 NESTED EventModel 条目使用 writable-nested-serializers。这样，您可以通过其 id 直接更新Actor 的avatar_url。

按要求更新

您需要更改您的create 方法，以便创建Actor、Repo 并将它们的ID 链接到Event

def create(self, validated_data):
        actor = validated_data.pop('actor')
        repo = validated_data.pop('repo')
        actor = Actor.objects.create(**actor)
        repo = Repo.objects.create(**repo)
        return Event.objects.create(actor=actor,repo=repo,**validated_data)