每当添加新帖子时,我都会创建订阅。订阅可以在graphiql
界面上正常工作。
这是我使用useSubscription
钩子的反应代码
export const SUSCRIBE_POSTS = gql`
{
subscription
posts {
newPost {
body
id
createdAt
}
}
}
`;
const {
loading: suscriptionLoading,
error: subscriptionError,
data: subscriptionData,
} = useSubscription(SUSCRIBE_POSTS);
当我尝试管理日志subscriptionData
时,我一无所获。当我添加帖子时,它可以正确保存在数据库中,用于获取帖子的useQuery
钩也可以正常工作,但是当我添加新帖子时,看不到订阅数据。我在控制台中也看不到任何错误。当我登录suscriptionLoading
时,Ido一开始就正确。我不确定该如何调试。
根据文档https://www.apollographql.com/docs/react/data/subscriptions/
正确完成了客户端设置这是代码
const httpLink = createHttpLink({
uri: "http://localhost:4000/",
});
const wsLink = new WebSocketLink({
uri: `ws://localhost:4000/graphql`,
options: {
reconnect: true,
},
});
const authLink = setContext(() => {
const token = localStorage.getItem("jwtToken");
return {
headers: {
Authorization: token ? `Bearer ${token}` : "",
},
};
});
const link = split(
// split based on operation type
({ query }) => {
const definition = getMainDefinition(query);
return (
definition.kind === "OperationDefinition" &&
definition.operation === "subscription"
);
},
wsLink,
authLink.concat(httpLink)
);
const client = new ApolloClient({
link: link,
cache: new InMemoryCache(),
});
export default (
<ApolloProvider client={client}>
<App />
</ApolloProvider>
);
答案 0 :(得分:1)
export const SUSCRIBE_POSTS = gql`
subscription
posts {
newPost {
body
id
createdAt
}
}
`;
您可以尝试删除订阅gql的最外括号吗?