石墨烯 django m2m 与通过表

如何解决石墨烯 django m2m 与通过表

我是编程新手，我自己开始玩和学习 graphene-django。现在，我不确定目前是否有可能拥有这样的东西：

query {
  allTeams {
    name,members {
      user {
        firstName,lastName
      },role,label
    }
  }
}

结果在哪里：

{
  "data": {
    "allTeams": [
      {
        "name": ...,"members": [
          {
            "user": {
              "firstName": ...,"lastName": ...
            },"role": ...,"label": ...
          },...
        ]
      },...
    ]
  }
}

我的模型目前看起来像这样：

class Team(models.Model):
    name = models.CharField(max_length=255,blank=False,null=False)
    members = models.ManyToManyField('account.User',through='TeamMembers',related_name='teams',related_query_name='team')

class TeamMembers(models.Model):
    team = models.ForeignKey(Team,on_delete=models.CASCADE)
    user = models.ForeignKey('account.User',models.SET_NULL,null=True)
    role = models.CharField(max_length=6)
    label = models.CharField(max_length=2,blank=True,null=True)

    class Meta:
        unique_together = [['team','user']]

我的 User 模型只是一个位于 AbstractUser 的 account.models，我的架构如下：

class UserType(DjangoObjectType):
    class Meta:
        model = User
        fields = ['first_name','last_name']


class TeamMemberType(DjangoObjectType):
    class Meta:
        model = TeamMembers
        fields = ['user','role','label']

    user = graphene.List(UserType)
    role = graphene.String()
    label = graphene.String()

    def resolve_user(self,info):
        return self.user

    def resolve_role(self,info):
        return self.role

    def resolve_label(self,info):
        return self.label


class TeamType(DjangoObjectType):
    class Meta:
        model = Team
        fields = ['name','members']

    members = graphene.List('schemas.team_schema.TeamMemberType')

    def resolve_members(self,info):
        return self.members.all()

使用此方法，当我运行此查询时，我收到此消息：

{
  "errors": [
    {
      "message": "Expected value of type \"TeamMemberType\" but got: User.","locations": [
        {
          "line": ..,"column": ..
        }
      ]
    },...
  ],"data": {
    "allTeams": [
      {
        "name": ...,"members": [
          null,null,null
        ]
      },...
    ]
  }
}

我曾尝试到处寻找解决方案，但没有找到。我已经阅读了 graphene-django 和 graphene-python 的文档，但没有找到关于带有直通表的 m2m 字段的示例或文档。非常感谢任何帮助。