reactjs - 调用 store.writeQuery() 后组件不会重新呈现

Question

所以我正在关注 https://www.howtographql.com/react-apollo/6-more-mutations-and-updating-the-store/ 上的 graphql + apollo 教程我有一堆“链接”组件，当它们被投票时应该显示新的票数。到目前为止，它不会在投票时重新呈现，我必须刷新页面。

我尝试通过使用更新后的数据调用 store.writeQuery() 来实现这一点。我检查了一下，我传入的数据对象确实和旧的不一样:

这是我的初始设置:

import { ApolloProvider } from "react-apollo";
import { ApolloClient } from "apollo-client";
import { createHttpLink } from "apollo-link-http";
import { InMemoryCache } from "apollo-cache-inmemory"
import { setContext } from "apollo-link-context";
import App from './components/App';
import {AUTH_TOKEN} from "./constants.js";

const authLink = setContext((_, { headers }) => 
{
    const token = localStorage.getItem(AUTH_TOKEN);
    return {
        headers: {
        ...headers,
        authorization: (token ? "Bearer " + token : ""),
    }
  }
});

const httpLink = createHttpLink({
    uri: "http://localhost:4000"
});

const apolloClient = new ApolloClient({
    link: authLink.concat(httpLink),
    cache: new InMemoryCache(),
})

这是变异组件:

<Mutation 
            mutation={VOTE_MUTATION}
            variables={{id: this.props.link.id}}
            update={(store, { data: { upVote } }) =>
            {
              const data = store.readQuery({ query: FEED_QUERY });

              const votedLink = data.feed.links.find(link => link.id === this.props.link.id);
              votedLink.votes = upVote.link.votes;
              console.log(data);
              store.writeQuery({ 
                query: FEED_QUERY, 
                data,
              });
            } }
            >
            {
            mutationCallback =>
              (<div className="ml1 gray f11" style={{cursor: "pointer"}} onClick={mutationCallback}>
                ▲
              </div>)
            }
              </Mutation>

这是获取所有链接的查询:

const FEED_QUERY = gql`
{
    feed
    {
        links
        {
            id url description createdAt 
            createdBy{
                name email
            } 
            votes{
                id
            }
        }
    }
}
`;

然后我调用 store.readQuery() 和 store.writeQuery() 并期望被点赞的链接将重新呈现以显示新的票数。我还记录了传入的数据对象，以确保它已更新，而且确实已更新。但是没有重新渲染。有什么问题吗？

Answer 1

将更多信息添加到 apolloClient dataIdFromObject:documentation

const apolloClient = new ApolloClient({
    link: authLink.concat(httpLink),
    cache: new InMemoryCache(),
    dataIdFromObject: o => o.id 
})