1

阿波罗客户端：2.6.3
阿波罗链接-http：1.5.15
阿波罗链接-ws：1.0.18
订阅-传输-ws：0.9.16

所以我有一个前端（节点）服务器，它连接到后端（graphql-yoga）服务器，如下所示：

  const httpLink = createHttpLink({
    uri: 'https://localhost:4444',
    credentials: 'include',
  });

  const wsLink = process.browser ? new WebSocketLink({
    uri: 'wss://eu1.prisma.sh/MyID/MyProject/dev',
    options: {
      reconnect: true,
      timeout: 3000,
    }
  }) : null;

  const authLink = setContext(() => {
    return {
      headers: {
        ...headers,
      }
    }
  });

  const link = process.browser ? split(
  ({ query }) => {
    const definition = getMainDefinition(query);
    return (
      definition.kind === 'OperationDefinition' &&
      definition.operation === 'subscription'
    );
  },
  wsLink,
  httpLink,
  ) : httpLink;

  const client = new ApolloClient({
    link: authLink.concat(link),
    ...
  });

查询和变异解析器被正确触发，但订阅解析器没有被触发。我假设那是因为我没有直接连接到 graphql-yoga。但是，如果我将 WebSocketLink uri 更改ws://localhost:4000为此会导致：

failed: Error during WebSocket handshake: Unexpected response code: 200

要发出的错误消息。

graphql-yoga 服务器本身与 prisma 建立订阅连接，如下所示：

const options = {
  subscriptions: 'https://eu1.prisma.sh/MyID/MyProject/dev',
};

// start it!!
server.start(options, ({ port }) =>
    console.log(`Server is now running on port http://localhost:${port}`),
);

我的订阅解析器如下：

  const Subscription = {
      order: {
        async subscribe(parent, args, ctx, info) {
            return ctx.db.subscription.order(
              {
                where: {
                    mutation_in: ['CREATED', 'UPDATED'],
                },
              },
              info
            ).catch(handleSubmitError);
        },
      }
  };

如果我在操场上运行以下订阅：

subscription {
  order {
    mutation
    node {
      id
      total
      createdAt
      items {
        id
        title
        price
        description
        mainDescription
        quantity
        image
      }
    }
  }
}

并通过我的网站触发订单突变，显示正确的数据结果集：

在此处输入图像描述

但是订阅解析器没有被订阅调用操作：

const USER_ORDERS_SUBSCRIPTION = gql`
  subscription {
    order {
      mutation
      node {
        id
        total
        createdAt
        items {
          id
          title
          price
          description
          mainDescription
          quantity
          image
        }
      }
    }
  }
`;

        <Query query={USER_ORDERS_QUERY}>
          {({ subscribeToMore, data: { orders }, loading, error }) => {
            if (loading) return <p>loading...</p>;
            if (error) return <Error erorr={error} />;
            return (
              <div>
                <h2>You have {orders.length === 0 ? 'no' : orders.length} order{orders.length > 1 || orders.length === 0 ? 's' : ''}.</h2>
                <OrderListItem 
                  orders={orders}
                  urlReferer={urlReferer} 
                  subscribeToNewOrders={() =>
                    subscribeToMore({
                      document: USER_ORDERS_SUBSCRIPTION,
                      variables: {},
                      updateQuery: (prev, { subscriptionData }) => {
                        if (!subscriptionData.data) return prev;
                        const newOrdertem = subscriptionData.data.order.node;
          
                        return Object.assign({}, prev, {
                          orders: [newOrdertem, ...prev.orders]
                        });
                      }
                    })
                  } 
                />
              </div>
            );
          }}
        </Query>

我该如何解决这个问题？

4

1 回答 1

0

所以事实证明解决方案是：

const options = {
  subscriptions: '/subscriptions',
};

然后将服务器称为：

  const wsLink = process.browser ? new WebSocketLink({
    uri: 'ws://localhost:4444/subscriptions',
  })
于 2019-07-23T08:44:06.517 回答