使用Graphene和Python的订阅类示例

import graphene

class ChatSubscription(graphene.Subscription):
    class Arguments:
        room_id = graphene.Int(required=True)

    message = graphene.String()

    def subscribe(root, info, room_id):
        # 在这里实现订阅逻辑，例如订阅特定房间的聊天消息
        pass

    def resolve_message(root, info):
        # 在这里实现返回订阅数据的逻辑，例如返回最新的聊天消息
        pass

class Query(graphene.ObjectType):
    # 定义查询类型
    pass

class Mutation(graphene.ObjectType):
    # 定义变更类型
    pass

class Subscription(graphene.ObjectType):
    # 定义订阅类型
    chat_subscription = ChatSubscription.Field()

schema = graphene.Schema(query=Query, mutation=Mutation, subscription=Subscription)

from django.views.decorators.csrf import csrf_exempt
from graphene_django.views import GraphQLSubscriptionView

urlpatterns = [
    # 其他URL配置
    path('graphql/', csrf_exempt(GraphQLSubscriptionView.as_view(schema=schema))),
]