{"id":47894,"date":"2023-06-16T06:26:25","date_gmt":"2023-10-27T07:09:22","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8react%e5%92%8ctypescript%ef%bc%9a%e9%80%9a%e8%bf%87apollo-client%e7%9a%84subscription%e4%bb%8egraphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%9e%e6%97%b6%e8%8e%b7%e5%8f%96%e6%9b%b4%e6%96%b0\/"},"modified":"2024-04-30T09:07:34","modified_gmt":"2024-04-30T01:07:34","slug":"%e4%bd%bf%e7%94%a8react%e5%92%8ctypescript%ef%bc%9a%e9%80%9a%e8%bf%87apollo-client%e7%9a%84subscription%e4%bb%8egraphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%9e%e6%97%b6%e8%8e%b7%e5%8f%96%e6%9b%b4%e6%96%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8react%e5%92%8ctypescript%ef%bc%9a%e9%80%9a%e8%bf%87apollo-client%e7%9a%84subscription%e4%bb%8egraphql%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%9e%e6%97%b6%e8%8e%b7%e5%8f%96%e6%9b%b4%e6%96%b0\/","title":{"rendered":"\u4f7f\u7528React\u548cTypeScript\uff1a\u901a\u8fc7Apollo Client\u7684Subscription\u4eceGraphQL\u670d\u52a1\u5668\u5b9e\u65f6\u83b7\u53d6\u66f4\u65b0"},"content":{"rendered":"<p>Apollo Client\u662f\u4e00\u500b\u5728React\u4e2d\u4f7f\u7528\u7684\u72c0\u614b\u7ba1\u7406\u5eab\u3002\u5b83\u53ef\u4ee5\u8655\u7406\u672c\u5730\u548c\u9060\u7a0b\u7684\u6578\u64da\uff0c\u4e26\u4f7f\u7528GraphQL\u3002\u672c\u6587\u662f\u6839\u64da\u5b98\u65b9\u7db2\u7ad9\u4e0a\u7684\u300cSubscriptions &#8211; Get real-time updates from your GraphQL server\u300d\u4f86\u89e3\u91cb\u5982\u4f55\u5f9eGraphQL\u670d\u52d9\u5668\u5be6\u6642\u66f4\u65b0\u6578\u64da\u7684\u3002\u95b1\u8b80\u672c\u6587\u7684\u524d\u63d0\u662f\u5df2\u7d93\u5b78\u7fd2\u4e86\u5728Apollo Client\u4e2d\u4f7f\u7528\u67e5\u8a62\u7684\u57fa\u790e\u77e5\u8b58\uff08\u5982\u679c\u9084\u6c92\u6709\uff0c\u8acb\u5148\u95b1\u8b80\u300cReact + TypeScript: Apollo Client\u306eGraphQL\u30af\u30a8\u30ea\u3092\u4f7f\u3063\u3066\u307f\u308b\u300d\uff09\u3002\u9019\u4e0d\u662f\u6587\u4ef6\u7684\u7ffb\u8b6f\uff0c\u800c\u662f\u7528\u65e5\u8a9e\u91cd\u65b0\u89e3\u91cb\u3002\u90e8\u5206\u5167\u5bb9\u5df2\u7701\u7565\uff0c\u4e26\u88dc\u5145\u4e86\u4e00\u4e9b\u4e0d\u592a\u5bb9\u6613\u7406\u89e3\u7684\u5730\u65b9\u3002<\/p>\n<p>GraphQL\u652f\u6301\u7684\u7b2c\u4e09\u79cd\u64cd\u4f5c\u662f\u8ba2\u9605\uff0c\u5b83\u53ef\u4ee5\u5bf9\u67e5\u8be2\u548c\u53d8\u66f4\u8fdb\u884c\u540c\u65f6\u5904\u7406\u3002<\/p>\n<p>\u4e0e\u67e5\u8be2\u4e00\u6837\uff0c\u8ba2\u9605\u4e5f\u53ef\u4ee5\u83b7\u53d6\u6570\u636e\u3002\u4e0e\u67e5\u8be2\u4e0d\u540c\u7684\u662f\uff0c\u8ba2\u9605\u662f\u4e00\u4e2a\u957f\u671f\u64cd\u4f5c\uff0c\u53ef\u4ee5\u968f\u65f6\u95f4\u7684\u63a8\u79fb\u800c\u6539\u53d8\u7ed3\u679c\u3002\u5b83\u4fdd\u6301\u4e0eGraphQL\u670d\u52a1\u5668\u7684\u6d3b\u52a8\u8fde\u63a5\uff08\u6700\u5e38\u89c1\u7684\u662f\u901a\u8fc7WebSocket\uff09\u3002\u53ef\u4ee5\u901a\u8fc7\u8ba2\u9605\u7ed3\u679c\u4ece\u670d\u52a1\u5668\u63a8\u9001\u66f4\u65b0\u3002<\/p>\n<p>\u80fd\u591f\u5b9e\u65f6\u901a\u77e5\u5ba2\u6237\u7aef\u540e\u7aef\u6570\u636e\u7684\u53d8\u66f4\u662f\u8ba2\u9605\u7684\u4fbf\u5229\u4e4b\u5904\u3002\u8fd9\u5305\u62ec\u521b\u5efa\u65b0\u5bf9\u8c61\u548c\u66f4\u65b0\u91cd\u8981\u5b57\u6bb5\u7b49\u64cd\u4f5c\u3002<\/p>\n<h1>\u4ec0\u4e48\u65f6\u5019\u4f7f\u7528\u8ba2\u9605\u5462\uff1f<\/h1>\n<p>\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5efa\u8bae\u5ba2\u6237\u7aef\u4e0d\u8981\u4f7f\u7528\u8ba2\u9605\u6765\u83b7\u53d6\u540e\u7aef\u7684\u6700\u65b0\u4fe1\u606f\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528pollInterval\u4ee5\u56fa\u5b9a\u65f6\u95f4\u95f4\u9694\u8fdb\u884c\u67e5\u8be2\u3002\u6216\u8005\uff0c\u60a8\u4e5f\u53ef\u4ee5\u4f7f\u7528refetch\u51fd\u6570\uff0c\u5728\u67d0\u4e9b\u64cd\u4f5c\uff08\u4f8b\u5982\u6309\u94ae\u70b9\u51fb\uff09\u89e6\u53d1\u65f6\u91cd\u65b0\u6267\u884c\u6240\u9700\u7684\u67e5\u8be2\uff08\u8bf7\u53c2\u8003\u201c\u66f4\u65b0\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\u201d\uff09\u3002<\/p>\n<p>\u4f7f\u7528\u8ba2\u9605\u670d\u52a1\u7684\u60c5\u51b5\u5982\u4e0b\uff1a<\/p>\n<p>\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5c0f\u3055\u304f\u6bb5\u968e\u7684\u306a\u5909\u66f4<br \/>\n\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u7e70\u308a\u8fd4\u3057\u66f4\u65b0\u3059\u308b\u306e\u306f\u3001\u3068\u304f\u306b\u305d\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u307b\u3068\u3093\u3069\u304c\u307b\u307c\u5909\u308f\u3089\u306a\u3044\u5834\u5408\u306f\u9ad8\u30b3\u30b9\u30c8\u3067\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u3068\u304d\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u521d\u671f\u72b6\u614b\u306f\u30af\u30a8\u30ea\u3067\u53d6\u5f97\u3057\u3066\u304a\u304d\u3001\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u500b\u3005\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u66f4\u65b0\u3092\u30d7\u30ed\u30a2\u30af\u30c6\u30a3\u30d6\u306b\u30d7\u30c3\u30b7\u30e5\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u9045\u5ef6\u306e\u5c11\u306a\u3044\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306e\u66f4\u65b0<br \/>\n\u305f\u3068\u3048\u3070\u3001\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u3001\u65b0\u3057\u3044\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u5165\u624b\u53ef\u80fd\u306b\u306a\u308a\u6b21\u7b2c\u3001\u305d\u308c\u3092\u53d7\u3051\u53d6\u308a\u305f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h1>\u9009\u62e9\u8ba2\u9605\u670d\u52a1\u56fe\u4e66\u9986<\/h1>\n<p>GraphQL\u7684\u89c4\u8303\u6ca1\u6709\u5b9a\u4e49\u7528\u4e8e\u53d1\u9001\u8ba2\u9605\u8bf7\u6c42\u7684\u7279\u5b9a\u534f\u8bae\u3002\u5728WebSocket\u4e0a\u5b9e\u73b0\u4e86\u8ba2\u9605\u7684Apollo Client\u652f\u6301graphql-ws\u5e93\u3002\u63a5\u4e0b\u6765\u6211\u5c06\u8bf4\u660e\u5982\u4f55\u4f7f\u7528graphql-ws\u3002<\/p>\n<h1>\u5b9a\u4e49\u8ba2\u9605<\/h1>\n<p>\u4e0e\u67e5\u8be2\u548c\u66f4\u6539\u4e00\u6837\uff0c\u8ba2\u9605\u4e5f\u5728\u670d\u52a1\u5668\u7aef\u548c\u5ba2\u6237\u7aef\u4e24\u8fb9\u5b9a\u4e49\u3002<\/p>\n<h2>\u670d\u52a1\u5668\u7aef<\/h2>\n<p>\u8bf7\u5728GraphQL\u6a21\u5f0f\u4e2d\u4f7f\u7528Subscription\u7c7b\u578b\u5b9a\u4e49\u53ef\u7528\u7684\u8ba2\u9605\u3002 commentAdded\u662f\u4e00\u4e2a\u8ba2\u9605\uff0c\u5b83\u4f1a\u901a\u77e5\u8ba2\u9605\u4e86\u7279\u5b9a\u535a\u5ba2\u6587\u7ae0\uff08\u901a\u8fc7postID\u6307\u5b9a\uff09\u7684\u5ba2\u6237\u7aef\uff0c\u6bcf\u5f53\u6709\u65b0\u7684\u8bc4\u8bba\u6dfb\u52a0\u5230\u8be5\u6587\u7ae0\u4e2d\u65f6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">Subscription<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"n\">commentAdded<\/span><span class=\"p\">(<\/span><span class=\"n\">postID<\/span><span class=\"p\">:<\/span> <span class=\"nb\">ID<\/span><span class=\"p\">!):<\/span> <span class=\"n\">Comment<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6709\u5173\u5728\u670d\u52a1\u5668\u7aef\u5b9e\u73b0\u8ba2\u9605\u529f\u80fd\u7684\u65b9\u6cd5\uff0c\u8bf7\u53c2\u9605\u201cApollo Server\u4e2d\u7684\u8ba2\u9605\u201d\u4ee5\u83b7\u53d6\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n<h2>\u5ba2\u6237\u7aef<\/h2>\n<p>\u8bf7\u5728\u5e94\u7528\u7a0b\u5e8f\u7684\u5ba2\u6237\u7aef\u4e2d\uff0c\u4f7f\u7528Apollo Client\u6267\u884c\u6bcf\u4e2a\u8ba2\u9605\u7684\u5f62\u72b6\u65f6\uff0c\u8bf7\u6309\u4ee5\u4e0b\u65b9\u5f0f\u89c4\u5b9a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">COMMENTS_SUBSCRIPTION<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">gql<\/span><span class=\"s2\">`\r\n\tsubscription OnCommentAdded($postID: ID!) {\r\n\t\tcommentAdded(postID: $postID) {\r\n\t\t\tid\r\n\t\t\tcontent\r\n\t\t}\r\n\t}\r\n`<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5f53Apollo Client\u6267\u884cOnCommentAdded\u8ba2\u9605\u65f6\uff0c\u5c06\u5efa\u7acb\u4e0eGraphQL\u670d\u52a1\u5668\u7684\u8fde\u63a5\u5e76\u7b49\u5f85\u54cd\u5e94\u6570\u636e\u3002\u4e0e\u67e5\u8be2\u4e0d\u540c\uff0c\u670d\u52a1\u5668\u4e0d\u4f1a\u7acb\u5373\u5904\u7406\u5e76\u8fd4\u56de\u54cd\u5e94\u3002\u670d\u52a1\u5668\u53ea\u4f1a\u5728\u540e\u7aef\u53d1\u751f\u7279\u5b9a\u4e8b\u4ef6\u65f6\u5c06\u6570\u636e\u63a8\u9001\u5230\u5ba2\u6237\u7aef\u3002<\/p>\n<p>\u5f53GraphQL\u670d\u52a1\u5668\u5411\u8ba2\u9605\u6570\u636e\u7684\u5ba2\u6237\u7aef\u8fdb\u884c\u63a8\u9001\u65f6\uff0c\u6570\u636e\u59cb\u7ec8\u4ee5\u6267\u884c\u76f8\u540c\u8ba2\u9605\u7ed3\u6784\u7684\u65b9\u5f0f\u8fdb\u884c\uff0c\u5c31\u50cf\u67e5\u8be2\u4e00\u6837\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n\t<span class=\"nl\">\"data\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nl\">\"commentAdded\"<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nl\">\"id\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"123\"<\/span><span class=\"p\">,<\/span>\r\n\t\t\t<span class=\"nl\">\"content\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"What a thoughtful and well written post!\"<\/span>\r\n\t\t<span class=\"p\">}<\/span>\r\n\t<span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u8bbe\u7f6e\u8fd0\u8f93\u65b9\u5f0f<\/h1>\n<p>\u4e00\u822c\u800c\u8a00\uff0c\u8ba2\u9605\uff08\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\uff09\u901a\u5e38\u4e0d\u4f7f\u7528ApolloClient\u9ed8\u8ba4\u7684HTTP\u4f20\u8f93\uff0c\u56e0\u4e3a\u5b83\u9700\u8981\u4fdd\u6301\u4e00\u76f4\u8fde\u63a5\u3002\u5728Apollo\u5ba2\u6237\u7aef\u8ba2\u9605\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u65b9\u5f0f\u662f\u901a\u8fc7graphql-ws\u5e93\u4f7f\u7528WebSocket\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n<h2>1. \u5b89\u88c5\u6240\u9700\u7684\u5e93<\/h2>\n<p>Apollo Link \u662f\u4e00\u4e2a\u6709\u7528\u7684\u5e93\uff0c\u7528\u4e8e\u5b9a\u5236 Apollo \u5ba2\u6237\u7aef\u7684\u7f51\u7edc\u901a\u4fe1\u3002\u901a\u8fc7\u8fd9\u4e2a\u5e93\uff0c\u60a8\u53ef\u4ee5\u5b9a\u4e49\u94fe\u63a5\u94fe\uff0c\u4ece\u800c\u4fee\u6539\u64cd\u4f5c\u6216\u5c06\u5176\u8def\u7531\u5230\u5408\u9002\u7684\u76ee\u6807\u3002<\/p>\n<p>\u8981\u901a\u8fc7WebSocket\u6267\u884c\u8ba2\u9605\uff0c\u9700\u8981\u5728\u94fe\u63a5\u94fe\u4e2d\u6dfb\u52a0GraphQLWsLink\u3002\u8bf7\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u5b89\u88c5\u6240\u9700\u7684graphql-ws\u5e93\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"go\">npm install graphql-ws\r\n<\/span><\/code><\/pre>\n<h2>\u521d\u59cb\u5316GraphQLWsLink\u3002<\/h2>\n<p>\u5728\u540c\u4e00\u4e2a\u9879\u76ee\u6587\u4ef6\u4e2d\u521d\u59cb\u5316ApolloClient\uff0c\u5bfc\u5165\u5e76\u521d\u59cb\u5316GraphQLWsLink\u5bf9\u8c61\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">GraphQLWsLink<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@apollo\/client\/link\/subscriptions<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">createClient<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">graphql-ws<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">wsLink<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">GraphQLWsLink<\/span><span class=\"p\">(<\/span><span class=\"nf\">createClient<\/span><span class=\"p\">({<\/span>\r\n\t<span class=\"na\">url<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">ws:\/\/localhost:4000\/subscriptions<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}));<\/span>\r\n<\/code><\/pre>\n<p>\u5c06url\u9009\u9879\u7684\u503c\u91cd\u5199\u4e3aGraphQL\u670d\u52a1\u5668\u4e13\u7528\u7684WebSocket\u7aef\u70b9\u3002\u5982\u679c\u60a8\u4f7f\u7528\u7684\u662fApollo Server\uff0c\u8bf7\u53c2\u8003\u201cApollo Server\u4e2d\u7684\u8ba2\u9605\u201d\u4e2d\u7684\u201c\u542f\u7528\u8ba2\u9605\u201d\u8fdb\u884c\u8bbe\u7f6e\u3002<\/p>\n<h2>\u4f7f\u7528\u64cd\u4f5c\u5c06\u901a\u4fe1\u5206\u79bb\uff08\u63a8\u8350\uff09<\/h2>\n<p>Apollo\u5ba2\u6237\u7aef\u53ef\u4ee5\u4f7f\u7528GraphQLWsLink\u6267\u884c\u6240\u6709\u7c7b\u578b\u7684\u64cd\u4f5c\u3002\u7136\u800c\uff0c\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5bf9\u4e8e\u67e5\u8be2\u548c\u53d8\u66f4\u4ecd\u7136\u6700\u597d\u4f7f\u7528HTTP\u3002\u67e5\u8be2\u548c\u53d8\u66f4\u662f\u65e0\u72b6\u6001\u7684\uff0c\u5e76\u4e14\u4e0d\u9700\u8981\u957f\u65f6\u95f4\u4fdd\u6301\u8fde\u63a5\u3002\u8fd9\u662f\u56e0\u4e3a\u5f53WebSocket\u8fde\u63a5\u5c1a\u672a\u5efa\u7acb\u65f6\uff0c\u4f7f\u7528HTTP\u53ef\u4ee5\u66f4\u9ad8\u6548\u4e14\u53ef\u6269\u5c55\u3002<\/p>\n<p>\u4e3a\u4e86\u652f\u6301\u901a\u4fe1\u7684\u5207\u5206\uff0c@apollo\/client\u5e93\u63d0\u4f9b\u4e86split\u51fd\u6570\u3002\u6839\u636e\u5e03\u5c14\u503c\u7684\u786e\u8ba4\u7ed3\u679c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e24\u4e2a\u4e0d\u540c\u7684\u94fe\u63a5\u4e4b\u4e00\u3002<\/p>\n<p>\u4e0b\u9762\u7684\u4ee3\u7801\u662f\u5728\u6269\u5c55\u524d\u4e00\u4e2a\u4f8b\u5b50\u7684\u57fa\u7840\u4e0a\u521d\u59cb\u5316\u4e86GraphQLWsLink\u548cHttpLink\u4e24\u4e2a\u94fe\u63a5\u3002\u7136\u540e\u4f7f\u7528split\u51fd\u6570\u5c06\u4e24\u4e2a\u94fe\u63a5\u5408\u5e76\u4e3a\u4e00\u4e2a\u94fe\u63a5\u3002\u4f7f\u7528\u54ea\u4e2a\u94fe\u63a5\u53d6\u51b3\u4e8e\u6267\u884c\u7684\u64cd\u4f5c\u7c7b\u578b\u7684\u4e0d\u540c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">split<\/span><span class=\"p\">,<\/span> <span class=\"nx\">HttpLink<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@apollo\/client<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">getMainDefinition<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@apollo\/client\/utilities<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">GraphQLWsLink<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@apollo\/client\/link\/subscriptions<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">createClient<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">graphql-ws<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">httpLink<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">HttpLink<\/span><span class=\"p\">({<\/span>\r\n\t<span class=\"na\">uri<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">http:\/\/localhost:4000\/graphql<\/span><span class=\"dl\">'<\/span>\r\n<span class=\"p\">});<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">wsLink<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">GraphQLWsLink<\/span><span class=\"p\">(<\/span><span class=\"nf\">createClient<\/span><span class=\"p\">({<\/span>\r\n\t<span class=\"na\">url<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">ws:\/\/localhost:4000\/subscriptions<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}));<\/span>\r\n\r\n<span class=\"c1\">\/\/ split\u95a2\u6570\u306e3\u3064\u306e\u5f15\u6570<\/span>\r\n<span class=\"c1\">\/\/ [1]\u5404\u64cd\u4f5c\u304c\u5b9f\u884c\u3055\u308c\u308b\u305f\u3073\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u95a2\u6570<\/span>\r\n<span class=\"c1\">\/\/ [2]\u95a2\u6570\u306e\u623b\u308a\u5024\u304c\u771f\u306e\u3068\u304d\u64cd\u4f5c\u306b\u7528\u3044\u308b\u30ea\u30f3\u30af<\/span>\r\n<span class=\"c1\">\/\/ [3]\u95a2\u6570\u306e\u623b\u308a\u5024\u304c\u507d\u306e\u3068\u304d\u64cd\u4f5c\u306b\u7528\u3044\u308b\u30ea\u30f3\u30af<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">splitLink<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">split<\/span><span class=\"p\">(<\/span>\r\n\t<span class=\"p\">({<\/span> <span class=\"nx\">query<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">definition<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">getMainDefinition<\/span><span class=\"p\">(<\/span><span class=\"nx\">query<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n\t\t\t<span class=\"nx\">definition<\/span><span class=\"p\">.<\/span><span class=\"nx\">kind<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">OperationDefinition<\/span><span class=\"dl\">'<\/span> <span class=\"o\">&amp;&amp;<\/span>\r\n\t\t\t<span class=\"nx\">definition<\/span><span class=\"p\">.<\/span><span class=\"nx\">operation<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">subscription<\/span><span class=\"dl\">'<\/span>\r\n\t\t<span class=\"p\">);<\/span>\r\n\t<span class=\"p\">},<\/span>\r\n\t<span class=\"nx\">wsLink<\/span><span class=\"p\">,<\/span>\r\n\t<span class=\"nx\">httpLink<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u6839\u636e\u8fd9\u4e2a\u903b\u8f91\uff0c\u67e5\u8be2\u548c\u66f4\u6539\u901a\u5e38\u4f7f\u7528HTTP\uff08httpLink\uff09\uff0c\u800c\u8ba2\u9605\u4f7f\u7528WebSocket\uff08wsLink\uff09\u3002<\/p>\n<h2>\u7ed9Apollo Client\u63d0\u4f9b\u94fe\u63a5\u94fe\u3002<\/h2>\n<p>\u5728\u5b9a\u4e49\u4e86\u5305\u542b\u4e24\u4e2a\u94fe\u63a5\u7684\u94fe\u63a5\u94fe\uff08splitLink\uff09\u540e\uff0c\u5c06\u5176\u4f5c\u4e3a Apollo Client \u7684\u94fe\u63a5\u6784\u9020\u5668\u9009\u9879\u63d0\u4f9b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">ApolloClient<\/span><span class=\"p\">,<\/span> <span class=\"nx\">InMemoryCache<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@apollo\/client<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ ...[\u524d\u63b2\u30b3\u30fc\u30c9\u306f\u7701\u7565]...<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">client<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ApolloClient<\/span><span class=\"p\">({<\/span>\r\n\t<span class=\"na\">link<\/span><span class=\"p\">:<\/span> <span class=\"nx\">splitLink<\/span><span class=\"p\">,<\/span>\r\n\t<span class=\"na\">cache<\/span><span class=\"p\">:<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">InMemoryCache<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">});<\/span>\r\n<\/code><\/pre>\n<p>\u3010\u6ce8\u3011link\u9009\u9879\u7684\u6307\u5b9a\u4f18\u5148\u4e8euri\u9009\u9879\uff08\u5982\u679c\u7ed9\u5b9a\u4e86uri\u4e2d\u7684URL\uff0c\u5219\u9ed8\u8ba4\u4f7f\u7528\u4f5c\u4e3aHTTP\u94fe\u63a5\u94fe\uff09\u3002<\/p>\n<h2>\u8fdb\u884cWebSocket\u8eab\u4efd\u9a8c\u8bc1\uff08\u9009\u9879\uff09<\/h2>\n<p>\u8ba2\u9605\u7ed3\u679c\u7684\u63a5\u6536\u5e94\u8be5\u5728\u5ba2\u6237\u7aef\u8fdb\u884c\u8ba4\u8bc1\u540e\u624d\u80fd\u5141\u8bb8\u3002\u4e3a\u6b64\uff0c\u5728\u6784\u9020\u51fd\u6570GraphQLWsLink\u4e2d\u63d0\u4f9bconnectionParams\u9009\u9879\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">GraphQLWsLink<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@apollo\/client\/link\/subscriptions<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">createClient<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">graphql-ws<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">wsLink<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">GraphQLWsLink<\/span><span class=\"p\">(<\/span><span class=\"nf\">createClient<\/span><span class=\"p\">({<\/span>\r\n\t<span class=\"na\">url<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">ws:\/\/localhost:4000\/subscriptions<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n\t<span class=\"na\">connectionParams<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"na\">authToken<\/span><span class=\"p\">:<\/span> <span class=\"nx\">user<\/span><span class=\"p\">.<\/span><span class=\"nx\">authToken<\/span><span class=\"p\">,<\/span>\r\n\t<span class=\"p\">},<\/span>\r\n<span class=\"p\">}));<\/span>\r\n<\/code><\/pre>\n<p>\u6bcf\u6b21\u8fde\u63a5\u65f6\uff0cGraphQLWsLink\u90fd\u4f1a\u5c06connectionParams\u5bf9\u8c61\u4f20\u9012\u7ed9\u670d\u52a1\u5668\u3002\u670d\u52a1\u5668\u5c06\u4f7f\u7528\u63a5\u6536\u5230\u7684connectionParams\u5bf9\u8c61\u6765\u6267\u884c\u8ba4\u8bc1\u548c\u5176\u4ed6\u8fde\u63a5\u76f8\u5173\u4efb\u52a1\u3002<\/p>\n<h1>\u8fdb\u884c\u8ba2\u9605<\/h1>\n<p>\u4e3a\u4e86\u6267\u884c\u8ba2\u9605\u64cd\u4f5c\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Apollo Client\u7684useSubscription\u94a9\u5b50\u51fd\u6570\uff0c\u5c31\u50cf\u4f7f\u7528useQuery\u4e00\u6837\uff0cuseSubscription\u4e5f\u4f1a\u4eceApollo Client\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679c\u5bf9\u8c61\uff0c\u5176\u4e2d\u5305\u542bloading\u3001error\u548cdata\u5c5e\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5b83\u4eec\u7528\u4e8eUI\u7684\u6e32\u67d3\u3002<\/p>\n<p>\u4e0b\u9762\u7684\u4ee3\u7801\u7ec4\u4ef6\uff08LatestComment\uff09\u4f7f\u7528\u4e86\u4e4b\u524d\u5b9a\u4e49\u7684\u8ba2\u9605\u3002\u5b83\u7528\u4e8e\u6e32\u67d3\u6307\u5b9a\u535a\u5ba2\u6295\u7a3f\u4e0a\u6dfb\u52a0\u7684\u6700\u65b0\u8bc4\u8bba\u3002\u6bcf\u5f53GraphQL\u670d\u52a1\u5668\u5411\u5ba2\u6237\u7aef\u63a8\u9001\u65b0\u8bc4\u8bba\u65f6\uff0c\u8be5\u7ec4\u4ef6\u5c06\u91cd\u65b0\u6e32\u67d3\u5e76\u663e\u793a\u65b0\u8bc4\u8bba\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">COMMENTS_SUBSCRIPTION<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">gql<\/span><span class=\"s2\">`\r\n\tsubscription OnCommentAdded($postID: ID!) {\r\n\t\tcommentAdded(postID: $postID) {\r\n\t\t\tid\r\n\t\t\tcontent\r\n\t\t}\r\n\t}\r\n`<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nf\">LatestComment<\/span><span class=\"p\">({<\/span> <span class=\"nx\">postID<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">data<\/span><span class=\"p\">,<\/span> <span class=\"nx\">loading<\/span> <span class=\"p\">}<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useSubscription<\/span><span class=\"p\">(<\/span>\r\n\t\t<span class=\"nx\">COMMENTS_SUBSCRIPTION<\/span><span class=\"p\">,<\/span>\r\n\t\t<span class=\"p\">{<\/span> <span class=\"na\">variables<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">postID<\/span> <span class=\"p\">}<\/span> <span class=\"p\">}<\/span>\r\n\t<span class=\"p\">);<\/span>\r\n\t<span class=\"k\">return<\/span> <span class=\"o\">&lt;<\/span><span class=\"nx\">h4<\/span><span class=\"o\">&gt;<\/span><span class=\"nx\">New<\/span> <span class=\"nx\">comment<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span><span class=\"o\">!<\/span><span class=\"nx\">loading<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">commentAdded<\/span><span class=\"p\">.<\/span><span class=\"nx\">content<\/span><span class=\"p\">}<\/span><span class=\"o\">&lt;<\/span><span class=\"sr\">\/h4&gt;<\/span><span class=\"err\">;\r\n<\/span><span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u8ba2\u9605\u67e5\u8be2\u7684\u66f4\u65b0<\/h1>\n<p>\u5f53ApolloClient\u8fd4\u56de\u67e5\u8be2\u7ed3\u679c\u65f6\uff0c\u4e00\u5b9a\u4f1a\u5305\u542bsubscribeToMore\u51fd\u6570\u3002\u901a\u8fc7\u8fd9\u4e2a\u51fd\u6570\u6267\u884c\u540e\u7eed\u8ba2\u9605\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5c06\u66f4\u65b0\u63a8\u9001\u5230\u539f\u59cb\u67e5\u8be2\u7684\u7ed3\u679c\u4e2d\u3002<\/p>\n<p>[\u6ce8] subscribeToMore\u51fd\u6570\u7684\u7ed3\u6784\u7c7b\u4f3c\u4e8e\u5e38\u7528\u4e8e\u5206\u9875\u5904\u7406\u7684fetchMore\u51fd\u6570\u3002\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u6267\u884c\u7684\u64cd\u4f5c\uff0cfetchMore\u7528\u4e8e\u540e\u7eed\u67e5\u8be2\uff0c\u800csubscribeToMore\u7528\u4e8e\u8ba2\u9605\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u4ece\u6807\u51c6\u67e5\u8be2\u4ee3\u7801\u793a\u4f8b\u5f00\u59cb\u3002\u8fd9\u6bb5\u4ee3\u7801\u5c06\u83b7\u53d6\u7279\u5b9a\u535a\u5ba2\u6587\u7ae0\u4e0a\u7684\u73b0\u6709\u8bc4\u8bba\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">COMMENTS_QUERY<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">gql<\/span><span class=\"s2\">`\r\n\tquery CommentsForPost($postID: ID!) {\r\n\t\tpost(postID: $postID) {\r\n\t\t\tcomments {\r\n\t\t\t\tid\r\n\t\t\t\tcontent\r\n\t\t\t}\r\n\t\t}\r\n\t}\r\n`<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nf\">CommentsPageWithData<\/span><span class=\"p\">({<\/span> <span class=\"nx\">params<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">result<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useQuery<\/span><span class=\"p\">(<\/span>\r\n\t\t<span class=\"nx\">COMMENTS_QUERY<\/span><span class=\"p\">,<\/span>\r\n\t\t<span class=\"p\">{<\/span> <span class=\"na\">variables<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">postID<\/span><span class=\"p\">:<\/span> <span class=\"nx\">params<\/span><span class=\"p\">.<\/span><span class=\"nx\">postID<\/span> <span class=\"p\">}<\/span> <span class=\"p\">}<\/span>\r\n\t<span class=\"p\">);<\/span>\r\n\t<span class=\"k\">return<\/span> <span class=\"o\">&lt;<\/span><span class=\"nx\">CommentsPage<\/span> <span class=\"p\">{...<\/span><span class=\"nx\">result<\/span><span class=\"p\">}<\/span> <span class=\"sr\">\/&gt;<\/span><span class=\"err\">;\r\n<\/span><span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5047\u8bbe\u73b0\u5728\uff0c\u5f53\u6709\u65b0\u7684\u8bc4\u8bba\u6dfb\u52a0\u5230\u6587\u7ae0\u4e2d\u65f6\uff0c\u6211\u4eec\u5e0c\u671b\u7acb\u5373\u4eceGraphQL\u670d\u52a1\u5668\u5c06\u66f4\u65b0\u63a8\u9001\u5230\u5ba2\u6237\u7aef\u3002\u9996\u5148\u9700\u8981\u505a\u7684\u662f\u5b9a\u4e49\u4e00\u4e2a\u8ba2\u9605\u3002\u5f53COMMENTS_QUERY\u8fd4\u56de\u65f6\uff0c\u6211\u4eec\u5c06\u5728Apollo Client\u4e2d\u6267\u884c\u6b64\u8ba2\u9605\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">COMMENTS_SUBSCRIPTION<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">gql<\/span><span class=\"s2\">`\r\n\tsubscription OnCommentAdded($postID: ID!) {\r\n\t\tcommentAdded(postID: $postID) {\r\n\t\t\tid\r\n\t\t\tcontent\r\n\t\t}\r\n\t}\r\n`<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u63a5\u4e0b\u6765\uff0c\u662f\u5bf9CommentsPageWithData\u51fd\u6570\u7684\u4fee\u6539\u3002\u6211\u4eec\u5c06\u5728\u8fd4\u56de\u7684CommentsPage\u7ec4\u4ef6\u4e2d\u52a0\u5165subscribeToNewComments\u5c5e\u6027\u3002\u8be5\u5c5e\u6027\u5c06\u6307\u5b9a\u4e00\u4e2a\u6267\u884csubscribeToMore\u51fd\u6570\u7684\u51fd\u6570\u3002\u7136\u540e\uff0c\u5728\u7ec4\u4ef6\u6302\u8f7d\u540e\uff08componentDidMount()\uff09\uff0c\u8c03\u7528\u8be5\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">CommentsPageWithData<\/span><span class=\"p\">({<\/span> <span class=\"nx\">params<\/span> <span class=\"p\">})<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">subscribeToMore<\/span><span class=\"p\">,<\/span> <span class=\"p\">...<\/span><span class=\"nx\">result<\/span> <span class=\"p\">}<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useQuery<\/span><span class=\"p\">(<\/span>\r\n\t\t<span class=\"nx\">COMMENTS_QUERY<\/span><span class=\"p\">,<\/span>\r\n\t\t<span class=\"p\">{<\/span> <span class=\"na\">variables<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">postID<\/span><span class=\"p\">:<\/span> <span class=\"nx\">params<\/span><span class=\"p\">.<\/span><span class=\"nx\">postID<\/span> <span class=\"p\">}<\/span> <span class=\"p\">}<\/span>\r\n\t<span class=\"p\">);<\/span>\r\n\r\n\t<span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n\t\t<span class=\"o\">&lt;<\/span><span class=\"nx\">CommentsPage<\/span>\r\n\t\t\t<span class=\"p\">{...<\/span><span class=\"nx\">result<\/span><span class=\"p\">}<\/span>\r\n\t\t\t<span class=\"nx\">subscribeToNewComments<\/span><span class=\"o\">=<\/span><span class=\"p\">{()<\/span> <span class=\"o\">=&gt;<\/span>\r\n\t\t\t\t<span class=\"nf\">subscribeToMore<\/span><span class=\"p\">({<\/span>\r\n\t\t\t\t\t<span class=\"na\">document<\/span><span class=\"p\">:<\/span> <span class=\"nx\">COMMENTS_SUBSCRIPTION<\/span><span class=\"p\">,<\/span>\r\n\t\t\t\t\t<span class=\"na\">variables<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"na\">postID<\/span><span class=\"p\">:<\/span> <span class=\"nx\">params<\/span><span class=\"p\">.<\/span><span class=\"nx\">postID<\/span> <span class=\"p\">},<\/span>\r\n\t\t\t\t\t<span class=\"na\">updateQuery<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">prev<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">subscriptionData<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t\t\t\t<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"nx\">subscriptionData<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">)<\/span> <span class=\"k\">return<\/span> <span class=\"nx\">prev<\/span><span class=\"p\">;<\/span>\r\n\t\t\t\t\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">newFeedItem<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">subscriptionData<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">commentAdded<\/span><span class=\"p\">;<\/span>\r\n\r\n\t\t\t\t\t\t<span class=\"k\">return<\/span> <span class=\"nb\">Object<\/span><span class=\"p\">.<\/span><span class=\"nf\">assign<\/span><span class=\"p\">({},<\/span> <span class=\"nx\">prev<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t\t\t\t\t<span class=\"na\">post<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t\t\t\t\t\t<span class=\"na\">comments<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"nx\">newFeedItem<\/span><span class=\"p\">,<\/span> <span class=\"p\">...<\/span><span class=\"nx\">prev<\/span><span class=\"p\">.<\/span><span class=\"nx\">post<\/span><span class=\"p\">.<\/span><span class=\"nx\">comments<\/span><span class=\"p\">]<\/span>\r\n\t\t\t\t\t\t\t<span class=\"p\">}<\/span>\r\n\t\t\t\t\t\t<span class=\"p\">});<\/span>\r\n\t\t\t\t\t<span class=\"p\">}<\/span>\r\n\t\t\t\t<span class=\"p\">})<\/span>\r\n\t\t\t<span class=\"p\">}<\/span>\r\n\t\t<span class=\"sr\">\/<\/span><span class=\"err\">&gt;\r\n<\/span>\t<span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u6b64\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0csubscribeToMore\u51fd\u6570\u7684\u53c2\u6570\u5bf9\u8c61\u6709\u4ee5\u4e0b\u4e09\u4e2a\u9009\u9879\u3002<\/p>\n<p>document &#8211; \u5b9f\u884c\u3059\u308b\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3002<\/p>\n<p>variables &#8211; \u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u3068\u304d\u306b\u542b\u3081\u308b\u5909\u6570\u3002<\/p>\n<p>updateQuery &#8211; \u30af\u30a8\u30ea\u306e\u7d50\u679c\u3092\u3069\u3046\u307e\u3068\u3081\u308b\u304bApollo Client\u306b\u6307\u793a\u3059\u308b\u95a2\u6570\u3002<\/p>\n<p>\u5f15\u6570 &#8211; \u30aa\u30d7\u30b7\u30e7\u30f3\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3002<\/p>\n<p>prev &#8211; \u30af\u30a8\u30ea\u306e\u73fe\u5728\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u3066\u3044\u308b\u7d50\u679c\u3002<\/p>\n<p>subscriptionData &#8211; GraphQL\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u30d7\u30c3\u30b7\u30e5\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3002<\/p>\n<p>\u623b\u308a\u5024 &#8211; \u30af\u30a8\u30ea\u306e\u73fe\u5728\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u7d50\u679c\u3092\u5b8c\u5168\u306b\u4e0a\u66f8\u304d\u3059\u308b\u5024\u3002<\/p>\n<p>\u6700\u540e\uff0c\u5728\u7c7b\u7ec4\u4ef6CommentsPage\u7684\u5b9a\u4e49\u4e2d\uff0c\u89c4\u5b9a\u7ec4\u4ef6\u5728\u6302\u8f7d(componentDidMount())\u65f6\u6267\u884csubscribeToNewComments\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">CommentsPage<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Component<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"nf\">componentDidMount<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">props<\/span><span class=\"p\">.<\/span><span class=\"nf\">subscribeToNewComments<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u4f7f\u7528\u8ba2\u9605API\u7684\u53c2\u8003\u6587\u6863<\/h1>\n<p>\u3010\u6ce8\u8a18\u3011\u5373\u4f7f\u4f7f\u7528\u4e86React Apollo\u7684Subscription Render Prop\u7ec4\u4ef6\uff0c\u4e0b\u8868\u4e2d\u7684\u9009\u9879\/\u7ed3\u679c\u5185\u5bb9\u4ecd\u7136\u6709\u6548\uff08\u9009\u9879\u662f\u7ec4\u4ef6\u7684\u5c5e\u6027\uff0c\u7ed3\u679c\u662f\u4f20\u9012\u7ed9\u6e32\u67d3\u51fd\u6570\u7684\u5185\u5bb9\uff09\u3002\u552f\u4e00\u7684\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\u8fd8\u9700\u8981subscription\u5c5e\u6027\uff08\u7528\u4e8e\u4fdd\u5b58\u7531gql\u89e3\u6790\u4e3aAST\u7684GraphQL\u8ba2\u9605\u6587\u6863\uff09\u3002<\/p>\n<p>\u5728 Render Props \u7ec4\u4ef6\u4e2d\uff0c\u9664\u4e86 Subscription \u4e4b\u5916\uff0c\u8fd8\u6709 Query \u548c Mutation\u3002\u7136\u800c\uff0c\u6839\u636e\u300c\u6269\u5c55\u7ec4\u4ef6\u300d\u7684\u8bf4\u6cd5\uff0c\u672a\u6765\u5efa\u8bae\u4e0e\u51fd\u6570\u7ec4\u4ef6\u4e00\u8d77\u4f7f\u7528 useSubscription\u3001useQuery \u548c useMutation\u3002<\/p>\n<h2>\u4ee5\u4e0b\u662f\u5176\u4e2d\u4e00\u79cd\u65b9\u5f0f\u4ee5\u4e2d\u6587\u672c\u5730\u5316\u5730\u91cd\u8ff0\uff1a&#8221;\u63d0\u4f9b\u4e00\u4e2a\u9009\u9879&#8221;<\/h2>\n<div>\n<div class=\"post-table\">\u30aa\u30d7\u30b7\u30e7\u30f3\u578b\u8aac\u660e<code>subscription<\/code>DocumentNode<code>graphql-tag<\/code>\u304cAST\u306b\u89e3\u6790\u3057\u305fGraphQL\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3002<code>useSubscription<\/code>\u30d5\u30c3\u30af\u3067\u306f\u3001\u7701\u7565\u3067\u304d\u308b\u3002\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u306f\u30d5\u30c3\u30af\u306e\u7b2c1\u5f15\u6570\u3068\u3057\u3066\u6e21\u305b\u308b\u305f\u3081\u3002<code>Subscription<\/code>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u306f\u5fc5\u9808\u3002<code>variables<\/code>{ [key: string]: any }\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u304c\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u306e\u3042\u308b\u3059\u3079\u3066\u306e\u5909\u6570\u3092\u542b\u3080\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3002<code>shouldResubscribe<\/code>boolean\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u89e3\u9664\u3057\u3066\u518d\u5ea6\u30b5\u30d6\u30b9\u30af\u30e9\u30a4\u30d6\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3002<code>onSubscriptionData<\/code>(options: OnSubscriptionDataOptions) =&gt; any<code>useSubscription<\/code>\u30d5\u30c3\u30af\/<code>Subscription<\/code>\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308b\u305f\u3073\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u767b\u9332\u5148\u3002\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306e<code>options<\/code>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001<code>client<\/code>\u5185\u306e\u73fe\u5728\u306eApollo Client\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3001\u304a\u3088\u3073<code>subscriptionData<\/code>\u3067\u53d7\u3051\u53d6\u3063\u305f\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u306b\u3088\u308a\u69cb\u6210\u3055\u308c\u308b\u3002<code>fetchPolicy<\/code>FetchPolicy\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304cApollo\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u3069\u306e\u3088\u3046\u306b\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u304b\u3092\u6307\u5b9a\u3059\u308b(\u300c<a href=\"https:\/\/www.apollographql.com\/docs\/react\/data\/queries\/#setting-a-fetch-policy\" target=\"_blank\" rel=\"nofollow noopener\">Setting a fetch policy<\/a>\u300d\u304a\u3088\u3073\u300c<a href=\"https:\/\/apollographql-jp.com\/tutorial\/queries\/#%E3%83%95%E3%82%A7%E3%83%83%E3%83%81%E3%83%9D%E3%83%AA%E3%82%B7%E3%83%BC%E3%82%92%E3%82%AB%E3%82%B9%E3%82%BF%E3%83%9E%E3%82%A4%E3%82%BA%E3%81%99%E3%82%8B\" target=\"_blank\" rel=\"nofollow noopener\">\u30d5\u30a7\u30c3\u30c1\u30dd\u30ea\u30b7\u30fc\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b<\/a>\u300d\u53c2\u7167)\u3002<code>context<\/code>Record\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9(Apollo Link)\u9593\u306e\u5171\u6709\u30b3\u30f3\u30c6\u30af\u30b9\u30c8\u3002<code>client<\/code>ApolloClient<code>ApolloClient<\/code>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001<code>useSubscription<\/code>\/<code>Subscription<\/code>\u306f\u3001\u30b3\u30f3\u30c6\u30af\u30b9\u30c8\u304b\u3089\u6e21\u3055\u308c\u305f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3092\u7528\u3044\u308b\u3002\u5225\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3092\u6e21\u3059\u3053\u3068\u3082\u53ef\u80fd\u3002<\/div>\n<\/div>\n<h2>\u7ed3\u679c\uff1a<\/h2>\n<p>useSubscription\u94a9\u5b50\u5728\u8c03\u7528\u540e\u8fd4\u56de\u4e00\u4e2a\u5177\u6709\u4e0b\u8868\u5c5e\u6027\u7684\u7ed3\u679c\u5bf9\u8c61\u3002<\/p>\n<div>\n<div class=\"post-table\">\u30d7\u30ed\u30d1\u30c6\u30a3\u578b\u8aac\u660e<code>data<\/code>TDataGraphQL\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u306e\u7d50\u679c\u3092\u542b\u3080\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u7a7a\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3002<code>loading<\/code>boolean\u521d\u671f\u30c7\u30fc\u30bf\u304c\u8fd4\u3055\u308c\u305f\u304b\u3069\u3046\u304b\u3092\u793a\u3059\u30d6\u30fc\u30eb\u5024\u3002<code>error<\/code>ApolloError<code>graphQLErrors<\/code>\u304a\u3088\u3073<code>networkError<\/code>\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u767a\u751f\u3057\u305f\u30e9\u30f3\u30bf\u30a4\u30e0\u30a8\u30e9\u30fc\u3002<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Apollo Client\u662f\u4e00\u500b\u5728React\u4e2d\u4f7f\u7528\u7684\u72c0\u614b\u7ba1\u7406\u5eab\u3002\u5b83\u53ef\u4ee5\u8655\u7406\u672c\u5730\u548c\u9060\u7a0b\u7684\u6578\u64da\uff0c\u4e26\u4f7f\u7528GraphQ [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47894","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u4f7f\u7528React\u548cTypeScript\uff1a\u901a\u8fc7Apollo Client\u7684Subscription\u4eceGraphQL\u670d\u52a1\u5668\u5b9e\u65f6\u83b7\u53d6\u66f4\u65b0 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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