{"id":47950,"date":"2023-11-11T15:56:13","date_gmt":"2022-12-22T12:21:46","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%902019%e5%b9%b42%e6%9c%88%e6%9c%ab%e7%89%88%e3%80%91apollo-express-angular%e5%ae%9e%e7%8e%b0graphql-pub-sub-%e3%80%9c-%e5%a5%bd%e5%a5%bd%e5%9c%b0%e4%bd%bf%e7%94%a8subscription\/"},"modified":"2024-05-04T08:31:38","modified_gmt":"2024-05-04T00:31:38","slug":"%e3%80%902019%e5%b9%b42%e6%9c%88%e6%9c%ab%e7%89%88%e3%80%91apollo-express-angular%e5%ae%9e%e7%8e%b0graphql-pub-sub-%e3%80%9c-%e5%a5%bd%e5%a5%bd%e5%9c%b0%e4%bd%bf%e7%94%a8subscription","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%902019%e5%b9%b42%e6%9c%88%e6%9c%ab%e7%89%88%e3%80%91apollo-express-angular%e5%ae%9e%e7%8e%b0graphql-pub-sub-%e3%80%9c-%e5%a5%bd%e5%a5%bd%e5%9c%b0%e4%bd%bf%e7%94%a8subscription\/","title":{"rendered":"\u30102019\u5e742\u6708\u672b\u7248\u3011Apollo + Express + Angular\u5b9e\u73b0GraphQL Pub\/Sub \u301c \u597d\u597d\u5730\u4f7f\u7528Subscription"},"content":{"rendered":"<h1>\u4f7f\u7528Apollo + Express + Angular \u8fdb\u884cGraphQL\u670d\u52a1\u5668\u5b9e\u73b0\u3002<\/h1>\n<p>\u636e\u8bf4GraphQL\u7684Subscription\u529f\u80fd\u7ec8\u4e8e\u53ef\u4ee5\u4f7f\u7528\u4e86\uff1f\u6240\u4ee5\u6211\u5c1d\u8bd5\u4e86GraphQL\u7684Pub\/Sub\u5b9e\u73b0\u3002<br \/>\n\u540e\u7aef\u7684GraphQL\u670d\u52a1\u5668\u662f\u57fa\u4e8eApollo + Express\uff0c\u5728\u524d\u7aef\uff0cWeb\u670d\u52a1\u5668\u662fApollo + Angular\u3002<br \/>\n\u8fd9\u6b21\u7684\u76ee\u7684\u53ea\u662f\u8fdb\u884c\u9a8c\u8bc1\u5b9e\u9a8c\uff0c\u6240\u4ee5\u6211\u4f1a\u7b80\u5355\u5730\u4f7f\u7528\u5355\u4e00\u7684Angular\u5e94\u7528\u6765\u6784\u5efa\u3002<\/p>\n<p>\u6210\u679c\u7269\u5728\u8fd9\u91cc \u2192 \u8bf7\u67e5\u770b github.com\/nGraphQL\u3002<\/p>\n<p>\u7531\u4e8e\u662f\u4e00\u4f53\u5316\u7684\uff0c\u6240\u4ee5Express\u4e5f\u662f\u4f7f\u7528TypeScript\u7f16\u5199\u7684\u3002\u6211\u6b63\u5728\u52aa\u529b\u4f7f\u7528ts-node\u6765\u8fd0\u884c\u5b83\u3002<\/p>\n<h2>\u8bf7\u60a8\u63d0\u4f9b\u53c2\u8003\u7f51\u5740\u3002<\/h2>\n<p>\u53ea\u8981\u8be6\u7ec6\u9605\u8bfbGraphQL\u5b98\u65b9\u7f51\u7ad9GraphQL.org\u4e0a\u5173\u4e8e\u5b9a\u4e49\u548c\u7f16\u5199\u7684\u8be6\u7ec6\u8bf4\u660e\uff0c\u60a8\u5c31\u80fd\u591f\u5f88\u597d\u5730\u7406\u89e3\u5b83\u3002\uff08\u867d\u7136\u53ef\u80fd\u4f1a\u6709\u4e9b\u56f0\u96be\u2026\u2026\uff09<\/p>\n<ul class=\"post-ul\">Introduction to GraphQL at GraphQL.org<\/ul>\n<p>\u540c\u65f6\uff0cApollo\u7684\u7f51\u7ad9\u4e0a\u8be6\u7ec6\u5730\u4ecb\u7ecd\u4e86Server\u548cClient\u7684\u5efa\u7acb\u65b9\u6cd5\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Angular + Apollo Client<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Angular + Apollo Client \u306e Subscriptions<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Apollo Server: Understanding schema concepts<\/ul>\n<\/li>\n<\/ul>\n<p>Graphql Subscriptions<\/p>\n<p>\u8fd9\u4e2a\u793a\u4f8b\u5b9e\u73b0\u5c06\u8fd9\u7247\u533a\u57df\u7684\u788e\u7247\u5316\u4fe1\u606f\u6574\u7406\u6210\u4e00\u672c\u5e76\u53ef\u64cd\u4f5c\u7684\u6837\u672c\u8bf4\u660e\u3002<br \/>\n\u6b64\u5916\uff0c\u6839\u636e\u4e0a\u8ff0Apollo Client\u7684\u6587\u6863\uff0c\u6bcf\u4e2a\u4f7f\u7528\u7684\u6846\u67b6\u90fd\u6709\u81ea\u5df1\u5355\u72ec\u7684\u6587\u7ae0\uff0c\u4f8b\u5982\u4e0a\u8ff0\u7684Subscriptions\u9875\u9762\u662fAngular\u7684\u9875\u9762\uff0c\u6240\u4ee5\u5982\u679c\u4eceReact\u9875\u9762\u8df3\u8f6c\u5230Subscriptions\uff0c\u5c31\u4f1a\u6709React\u7684\u6307\u5357\u3002\u4f60\u505a\u5f97\u5f88\u68d2\u54e6~<\/p>\n<h2>\u64cd\u4f5c\u65b9\u6cd5<\/h2>\n<p>\u6211\u8ba4\u4e3a\u5148\u8bd5\u7740\u8fd0\u884c\u4e00\u4e0b\u4f1a\u66f4\u5feb\uff0c\u6240\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u542f\u52a8\u3002<\/p>\n<h3>\u542f\u52a8GraphQL\u670d\u52a1\u5668\u3002<\/h3>\n<pre class=\"post-pre\"><code>$ npm run server\r\n<\/code><\/pre>\n<p>GraphQL\u670d\u52a1\u5668\u542f\u52a8\uff0c\u5e76\u4e14http:\/\/localhost:4000\/graphql\u6210\u4e3a\u7aef\u70b9\u3002<br \/>\n\u6b64\u5916\uff0cws:\/\/localhost:4000\/graphql\u5728\u540c\u4e00\u5730\u5740\u6210\u4e3a\u8ba2\u9605\u7aef\u70b9\u3002<\/p>\n<p>\u76f4\u63a5\u5728\u6d4f\u89c8\u5668\u4e2d\u6253\u5f00http:\/\/localhost:4000\/graphql\uff0c\u60a8\u53ef\u4ee5\u770b\u5230Apollo\u7684GraphQL\u5de5\u4f5c\u574a\u9875\u9762\uff0c\u60a8\u4e5f\u53ef\u4ee5\u5728\u6b64\u76f4\u63a5\u6267\u884cGraphQL API\u3002<\/p>\n<h3>Angular \u670d\u52a1\u5668\u7684\u542f\u52a8<\/h3>\n<pre class=\"post-pre\"><code>$ npm run start\r\n<\/code><\/pre>\n<p>\u90a3\u4e48\uff0c\u901a\u5e38\u7684ng serve\u5c31\u53ef\u4ee5\u8fd0\u884c\u4e86\u3002\u7b49\u5f85URL\u662fhttp:\/\/localhost:4200\u3002<br \/>\n\u5982\u679c\u5728\u6d4f\u89c8\u5668\u4e2d\u952e\u5165\uff0c\u5c06\u4f1a\u6253\u5f00\u4e00\u4e2a\u7b80\u5355\u7684\u754c\u9762\u3002<\/p>\n<p>\u8fd9\u4e2a\u7ed3\u6784\u7b80\u6d01\uff0c\u5305\u542b\u4e86\u4e66\u7c4d\u7684\u4f5c\u8005\u3001\u6807\u9898\u5217\u8868\uff0c\u6ce8\u518c\u8868\u5355\u548c\u5220\u9664\u6309\u94ae\u3002<\/p>\n<h1>\u5f00\u53d1\u6d41\u7a0b<\/h1>\n<p>\u6211\u4f1a\u9010\u6b65\u8bf4\u660e\u5177\u4f53\u7684\u5f00\u53d1\u6d41\u7a0b\u3002<\/p>\n<h2>\u51c6\u5907<\/h2>\n<p>\u50cf\u5f80\u5e38\u4e00\u6837\uff0c\u4f7f\u7528@angular\/cli\u8fdb\u884c\u521b\u5efa\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>ng new nGraphQL\r\n<span class=\"nv\">$ <\/span><span class=\"nb\">cd <\/span>nGraphQL\r\n<\/code><\/pre>\n<p>\u5728 Angular \u7cfb\u5217\u9879\u76ee\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528&#8221;ng&#8221;\u4f5c\u4e3a\u9879\u76ee\u540d\u3002\u6211\u5c1d\u8bd5\u5c06\u5176\u6539\u4e3a&#8221;nGraphQL&#8221;\uff0c\u4f46\u5e76\u6ca1\u6709\u7279\u522b\u7684\u610f\u4e49\u3002<\/p>\n<p>\u5b89\u88c5\u5fc5\u8981\u7684\u8f6f\u4ef6\u5305\u3002<\/p>\n<pre class=\"post-pre\"><code>$ npm install -S graphql apollo-server-express apollo-client apollo-angular apollo-angular-link-http apollo-cache-inmemory apollo-link-ws\r\n<\/code><\/pre>\n<p>\u8bf7\u68c0\u67e5 package.json \u6587\u4ef6\u4ee5\u67e5\u770b\u5b9e\u9645\u4f9d\u8d56\u5305\u548c\u811a\u672c\u3002<\/p>\n<h2>GraphQL \u670d\u52a1\u5668\u7684\u5b9e\u73b0<\/h2>\n<p>\u672c\u6587\u5c06\u8be6\u7ec6\u8bf4\u660e\u4f7f\u7528Apollo + Express\u5b9e\u73b0GraphQL\u670d\u52a1\u5668\u7684\u6b65\u9aa4\u3002<\/p>\n<p>\u670d\u52a1\u5668\u7a0b\u5e8f\u5b58\u653e\u5904\u88ab\u8f7b\u6613\u6807\u8bb0\u4e3a&#8221;server&#8221;\u3002<\/p>\n<pre class=\"post-pre\"><code>$ mkdir server &amp;&amp; cd server\r\n<\/code><\/pre>\n<p>\u9996\u5148\uff0c\u672c\u6b21\u8981\u5236\u4f5c\u7684\u6837\u672c\u6a21\u578b\u5b9a\u4e49\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kr\">interface<\/span> <span class=\"nx\">BookEntity<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nl\">id<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nl\">author<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nl\">title<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">bookFields<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">`\r\n  id: ID\r\n  title: String\r\n  author: String\r\n`<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u5b9a\u4e49\u4e86\u4e00\u4e2a\u53ea\u7531id\u3001author\u548ctitle\u4e09\u4e2a\u5b57\u6bb5\u7ec4\u6210\u7684\u7b80\u5355\u6a21\u578b\u4f5c\u4e3a\u63a5\u53e3\u3002\u6b64\u5916\uff0c\u4e3a\u4e86\u5728\u4e0b\u9762\u7684GraphQL\u6a21\u5f0f\u5b9a\u4e49\u4e2d\u4f7f\u7528\u8fd9\u4e09\u4e2a\u5b57\u6bb5\uff0c\u6211\u5c06\u5b83\u4eec\u5bfc\u51fa\u4e3a\u4e00\u4e2a\u79f0\u4e3abookFields\u7684\u5e38\u91cf\uff0c\u8be5\u5e38\u91cf\u53ea\u5305\u542b\u5b57\u6bb5\u540d\u79f0\u548c\u7c7b\u578b\u7684\u5b57\u7b26\u4e32\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5728GraphQL\u4e2d\uff0c\u6709\u4e00\u4e2a\u6709\u8da3\u7684\u7c7b\u578b\uff0c\u5373ID\u7c7b\u578b\u3002\u6709\u4e86\u8fd9\u4e2a\u7c7b\u578b\uff0c\u6211\u4eec\u5c31\u80fd\u591f\u786e\u5b9a\u6570\u636e\u5728\u54ea\u91cc\u662f\u552f\u4e00\u7684\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\u662f\u5173\u4e8eGraphQL\u7684\u5b9a\u4e49\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">gql<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">apollo-server-express<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">bookFields<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/BookEntity<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">TypeDefs<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">gql<\/span><span class=\"s2\">`\r\n  type Query {\r\n    books(author: String): [Book]\r\n  }\r\n  type Mutation {\r\n    book(item: BookEntry!): Book\r\n    removeBook(item: BookEntry!): Book\r\n  }\r\n  type Subscription {\r\n    bookChanged: Book\r\n  }\r\n  type Book {\r\n    <\/span><span class=\"p\">${<\/span><span class=\"nx\">bookFields<\/span><span class=\"p\">}<\/span><span class=\"s2\">\r\n  }\r\n  input BookEntry {\r\n    <\/span><span class=\"p\">${<\/span><span class=\"nx\">bookFields<\/span><span class=\"p\">}<\/span><span class=\"s2\">\r\n  }\r\n`<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u5728 Query \u4e2d\u5b9a\u4e49\u4e86\u4e00\u4e2a\u4ee5 author \u4e3a\u6761\u4ef6\u7684\u641c\u7d22\u67e5\u8be2 API\u3002<br \/>\n\u5728 Mutation \u4e2d\u5b9a\u4e49\u4e86\u63a5\u6536 BookEntry \u7684\u65b0\u5efa\u4e66\u7c4d\u7684 createBook \u548c\u5220\u9664\u4e66\u7c4d\u7684 removeBook\u3002<br \/>\n\u5728 Subscription \u4e2d\u5b9a\u4e49\u4e86\u5f53 BookEntry \u53d1\u751f\u53d8\u5316\u65f6\u4f1a\u63a8\u9001\u7684 bookChanged\u3002<\/p>\n<p>\u5373\u4f7f\u5b57\u6bb5\u5b8c\u5168\u76f8\u540c\uff0c\u8f93\u5165\u503c\u7684\u7c7b\u578b\u4e5f\u5fc5\u987b\u6839\u636etype\u548cinput\u8fdb\u884c\u5206\u5f00\u3002<\/p>\n<p>\u8ba9\u6211\u4eec\u5148\u6765\u770b\u4e00\u4e0b\u6267\u884c\u6b64GraphQL\u7684\u76f4\u63a5\u89e3\u6790\u5668\uff0c\u800c\u4e0d\u662f\u901a\u8fc7\u670d\u52a1\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">BookServiceWithPub<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"nx\">pubsub<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"nx\">BOOK_INSERT<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"nx\">BOOK_DELETE<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/BookPublishService<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">bookService<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nx\">BookServiceWithPub<\/span><span class=\"p\">();<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">resolvers<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"na\">Query<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"na\">books<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"nx\">args<\/span><span class=\"p\">,<\/span> <span class=\"nx\">context<\/span><span class=\"p\">,<\/span> <span class=\"nx\">info<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"nx\">bookService<\/span><span class=\"p\">.<\/span><span class=\"nx\">findByAuthor<\/span><span class=\"p\">(<\/span><span class=\"nx\">args<\/span><span class=\"p\">.<\/span><span class=\"nx\">author<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n  <span class=\"p\">},<\/span>\r\n  <span class=\"na\">Mutation<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"na\">book<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"nx\">args<\/span><span class=\"p\">,<\/span> <span class=\"nx\">context<\/span><span class=\"p\">,<\/span> <span class=\"nx\">info<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"nx\">bookService<\/span><span class=\"p\">.<\/span><span class=\"nx\">update<\/span><span class=\"p\">(<\/span><span class=\"nx\">args<\/span><span class=\"p\">.<\/span><span class=\"nx\">item<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">},<\/span>\r\n    <span class=\"na\">removeBook<\/span><span class=\"p\">:<\/span> <span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">,<\/span> <span class=\"nx\">args<\/span><span class=\"p\">,<\/span> <span class=\"nx\">context<\/span><span class=\"p\">,<\/span> <span class=\"nx\">info<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"nx\">bookService<\/span><span class=\"p\">.<\/span><span class=\"k\">delete<\/span><span class=\"p\">(<\/span><span class=\"nx\">args<\/span><span class=\"p\">.<\/span><span class=\"nx\">item<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n  <span class=\"p\">},<\/span>\r\n  <span class=\"na\">Subscription<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"na\">bookChanged<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"na\">subscribe<\/span><span class=\"p\">:<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">pubsub<\/span><span class=\"p\">.<\/span><span class=\"nx\">asyncIterator<\/span><span class=\"p\">([<\/span><span class=\"nx\">BOOK_INSERT<\/span><span class=\"p\">,<\/span> <span class=\"nx\">BOOK_DELETE<\/span><span class=\"p\">])<\/span>\r\n    <span class=\"p\">}<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u662f\u4e0e\u4e0a\u8ff0GraphQL\u6a21\u5f0f\u5b9a\u4e49\u76f8\u5bf9\u5e94\u7684\u6587\u4ef6\u3002\u8fd9\u4e2a\u89e3\u6790\u5668\u662fApollo\u76f4\u63a5\u7ed1\u5b9a\u7684\u3002\u6211\u4eec\u4ece\u8fd9\u91cc\u8c03\u7528\u5404\u79cd\u670d\u52a1\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4ece\u8fd9\u91cc\u8c03\u7528\u7684\u670d\u52a1\u7c7b\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">PubSub<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">graphql-subscriptions<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">BookRepository<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/BookRepository<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">BookEntity<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/BookEntity<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">BOOK_INSERT<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">book_event_success_inserted<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">BOOK_DELETE<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">book_event_success_deleted<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">pubsub<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nx\">PubSub<\/span><span class=\"p\">();<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">BookServiceWithPub<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">repo<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nx\">BookRepository<\/span><span class=\"p\">();<\/span>\r\n\r\n  <span class=\"nx\">update<\/span><span class=\"p\">(<\/span><span class=\"nx\">entity<\/span><span class=\"p\">:<\/span> <span class=\"nx\">BookEntity<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"nx\">ret<\/span> <span class=\"o\">=<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">repo<\/span><span class=\"p\">.<\/span><span class=\"nx\">change<\/span><span class=\"p\">(<\/span><span class=\"nx\">entity<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nx\">pubsub<\/span><span class=\"p\">.<\/span><span class=\"nx\">publish<\/span><span class=\"p\">(<\/span><span class=\"nx\">BOOK_INSERT<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"na\">bookChanged<\/span><span class=\"p\">:<\/span> <span class=\"nx\">ret<\/span> <span class=\"p\">});<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">ret<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nx\">findByAuthor<\/span><span class=\"p\">(<\/span><span class=\"nx\">author<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">repo<\/span><span class=\"p\">.<\/span><span class=\"nx\">findByAuthor<\/span><span class=\"p\">(<\/span><span class=\"nx\">author<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"k\">delete<\/span><span class=\"p\">(<\/span><span class=\"nx\">entity<\/span><span class=\"p\">:<\/span> <span class=\"nx\">BookEntity<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"nx\">ret<\/span> <span class=\"o\">=<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">repo<\/span><span class=\"p\">.<\/span><span class=\"k\">delete<\/span><span class=\"p\">(<\/span><span class=\"nx\">entity<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nx\">pubsub<\/span><span class=\"p\">.<\/span><span class=\"nx\">publish<\/span><span class=\"p\">(<\/span><span class=\"nx\">BOOK_DELETE<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"na\">bookChanged<\/span><span class=\"p\">:<\/span> <span class=\"nx\">ret<\/span> <span class=\"p\">});<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">ret<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u66f4\u65b0\u548c\u5220\u9664\u65f6\uff0c\u91cd\u70b9\u662f\u6267\u884c pubsub.publish \u7684\u90e8\u5206\u3002\u88ab\u53d1\u5e03\u7684\u5bf9\u8c61\u4e5f\u9700\u8981\u6309\u7167 {\u65b9\u6cd5\u540d\uff1a\u8fd4\u56de\u503c} \u7684\u683c\u5f0f\u3002<\/p>\n<p>\u8bf7\u5728\u4ee5\u540e\u7684BookEntryRepository\u4e2d\u7f16\u5199\u6570\u636e\u5e93\u5199\u5165\u7b49\u5904\u7406\u3002\u7531\u4e8e\u8fd9\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u6240\u4ee5\u6211\u4eec\u5f53\u524d\u76f4\u63a5\u5c06\u6570\u636e\u4fdd\u5b58\u4e3a\u4e00\u4e2a\u6570\u7ec4\u3002\u3002\u3002<\/p>\n<p>\u800c\u672c\u5821\uff0c\u662f\u670d\u52a1\u5668\u7684index.ts\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"o\">*<\/span> <span class=\"k\">as<\/span> <span class=\"nx\">express<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">express<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">createServer<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">http<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">ApolloServer<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">apollo-server-express<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">TypeDefs<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/schema<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">resolvers<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/resolvers<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">PORT<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">4000<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">app<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">express<\/span><span class=\"p\">();<\/span>\r\n\r\n<span class=\"nx\">process<\/span><span class=\"p\">.<\/span><span class=\"nx\">on<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">uncaughtException<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">error<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">));<\/span>\r\n<span class=\"nx\">process<\/span><span class=\"p\">.<\/span><span class=\"nx\">on<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">unhandledRejection<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">error<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">));<\/span>\r\n<span class=\"c1\">\/\/ CORS\u3092\u8a31\u53ef\u3059\u308b<\/span>\r\n<span class=\"nx\">app<\/span><span class=\"p\">.<\/span><span class=\"nx\">use<\/span><span class=\"p\">(<\/span><span class=\"kd\">function<\/span><span class=\"p\">(<\/span><span class=\"nx\">req<\/span><span class=\"p\">,<\/span> <span class=\"nx\">res<\/span><span class=\"p\">,<\/span> <span class=\"nx\">next<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">res<\/span><span class=\"p\">.<\/span><span class=\"nx\">header<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Access-Control-Allow-Origin<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">*<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"nx\">res<\/span><span class=\"p\">.<\/span><span class=\"nx\">header<\/span><span class=\"p\">(<\/span>\r\n    <span class=\"dl\">'<\/span><span class=\"s1\">Access-Control-Allow-Headers<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">'<\/span><span class=\"s1\">Origin, X-Requested-With, Content-Type, Accept<\/span><span class=\"dl\">'<\/span>\r\n  <span class=\"p\">);<\/span>\r\n  <span class=\"nx\">next<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">});<\/span>\r\n<span class=\"c1\">\/\/ resolvers<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">server<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nx\">ApolloServer<\/span><span class=\"p\">({<\/span> <span class=\"na\">typeDefs<\/span><span class=\"p\">:<\/span> <span class=\"nx\">TypeDefs<\/span><span class=\"p\">,<\/span> <span class=\"nx\">resolvers<\/span> <span class=\"p\">});<\/span>\r\n<span class=\"nx\">server<\/span><span class=\"p\">.<\/span><span class=\"nx\">applyMiddleware<\/span><span class=\"p\">({<\/span> <span class=\"nx\">app<\/span><span class=\"p\">,<\/span> <span class=\"na\">path<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">\/graphql<\/span><span class=\"dl\">'<\/span> <span class=\"p\">});<\/span>\r\n\r\n<span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"c1\">\/\/ ws_server<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">httpServer<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">createServer<\/span><span class=\"p\">(<\/span><span class=\"nx\">app<\/span><span class=\"p\">);<\/span>\r\n\r\n  <span class=\"nx\">server<\/span><span class=\"p\">.<\/span><span class=\"nx\">installSubscriptionHandlers<\/span><span class=\"p\">(<\/span><span class=\"nx\">httpServer<\/span><span class=\"p\">);<\/span>\r\n\r\n  <span class=\"nx\">httpServer<\/span><span class=\"p\">.<\/span><span class=\"nx\">listen<\/span><span class=\"p\">({<\/span> <span class=\"na\">port<\/span><span class=\"p\">:<\/span> <span class=\"nx\">PORT<\/span> <span class=\"p\">},<\/span> <span class=\"nx\">err<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span>\r\n      <span class=\"s2\">`? Server ready at http:\/\/localhost:<\/span><span class=\"p\">${<\/span><span class=\"nx\">PORT<\/span><span class=\"p\">}${<\/span><span class=\"nx\">server<\/span><span class=\"p\">.<\/span><span class=\"nx\">graphqlPath<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span>\r\n    <span class=\"p\">);<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">log<\/span><span class=\"p\">(<\/span>\r\n      <span class=\"s2\">`? Websocket Server is now running on ws:\/\/localhost:<\/span><span class=\"p\">${<\/span><span class=\"nx\">PORT<\/span><span class=\"p\">}${<\/span>\r\n        <span class=\"nx\">server<\/span><span class=\"p\">.<\/span><span class=\"nx\">subscriptionsPath<\/span>\r\n      <span class=\"p\">}<\/span><span class=\"s2\">`<\/span>\r\n    <span class=\"p\">);<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nb\">Error<\/span><span class=\"p\">(<\/span><span class=\"nx\">err<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n  <span class=\"p\">});<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"p\">(<\/span><span class=\"nx\">error<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">error<\/span><span class=\"p\">(<\/span><span class=\"nx\">error<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\u8981\u505a\u7684\u662f\uff1a<br \/>\n1. \u521b\u5efa\u4e00\u4e2a\u7531&#8221;const app = express();&#8221;\u751f\u6210\u7684Express\u5b9e\u4f8b<br \/>\n2. \u5c06\u8be5\u5b9e\u4f8b\u901a\u8fc7&#8221;server.applyMiddleware({ app, path: &#8216;\/graphql&#8217; });&#8221;\u4f20\u9012\u7ed9Apollo-Server<br \/>\n3. \u901a\u8fc7&#8221;const httpServer = createServer(app);&#8221;\u518d\u521b\u5efa\u4e00\u4e2ahttpServer\u5b9e\u4f8b<br \/>\n4. \u5c06\u8be5\u5b9e\u4f8b\u901a\u8fc7&#8221;server.installSubscriptionHandlers(httpServer);&#8221;\u5c06\u5176\u5d4c\u5165Apollo-Server\u4f5c\u4e3a\u7528\u4e8e\u8ba2\u9605\u7684\u670d\u52a1\u5668\u3002<\/p>\n<p>\u8fd9\u4e00\u70b9\u662f\u4ee5\u4e24\u4e2a\u90e8\u5206\u6784\u6210\u7684\u3002<\/p>\n<p>\u67e5\u8be2\u548c\u53d8\u5f02\u7684API\u901a\u5e38\u4f7f\u7528\u666e\u901a\u7684HTTP\uff0c\u4f46\u8ba2\u9605\u5219\u4f7f\u7528WebSocket\u6765\u4ece\u670d\u52a1\u5668\u8fdb\u884c\u63a8\u9001\u3002\u56e0\u6b64\u4f3c\u4e4e\u9700\u8981\u53e6\u4e00\u4e2a\u670d\u52a1\u5668\u5b9e\u4f8b\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u7531\u4e8eAngular\u7684\u7f51\u5740\u548c\u7aef\u53e3\u4e0d\u540c\uff0c\u56e0\u6b64\u4f1a\u53d7\u5230\u8de8\u57df\u9650\u5236\u7684\u7ea6\u675f\u3002\u56e0\u6b64\uff0c\u5c3d\u7ba1\u662f\u4e00\u4e2a\u591a\u5408\u4e00\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u4f46\u6211\u4eec\u5df2\u7ecf\u6dfb\u52a0\u4e86CORS\u5141\u8bb8\u3002<\/p>\n<p>\u6700\u540e\uff0c\u5c06tsconfig.json\u6587\u4ef6\u4e2d\u7684module\u4fee\u6b63\u4e3acommonjs\u3002<\/p>\n<pre class=\"post-pre\"><code>    <span class=\"nl\">\"module\"<\/span><span class=\"p\">:<\/span> <span class=\"s2\">\"commonjs\"<\/span><span class=\"err\">,<\/span>\r\n<\/code><\/pre>\n<p>\u6309\u7167\u4e0a\u8ff0\u7684\u6b65\u9aa4\u8fdb\u884c\u3002 de .)<\/p>\n<pre class=\"post-pre\"><code>$ ts-node server\/index.ts\r\n<\/code><\/pre>\n<p>\u6211\u5011\u5c07\u4f7f\u7528Express\u4f86\u555f\u52d5Apollo\u4f3a\u670d\u5668\u3002<br \/>\n\u8acb\u5c07\u6b64\u6307\u4ee4\u6dfb\u52a0\u5230package.json\u7684server\u4e2d\u3002<\/p>\n<h2>Angular\u5ba2\u6237\u7aef\u7684\u5b9e\u73b0<\/h2>\n<p>\u5728src\/app\/\u4e0b\u5c06\u8fdb\u884c\u5ba2\u6237\u7aef\u4ee5\u4e0b\u7684\u5b9e\u73b0\u3002<\/p>\n<pre class=\"post-pre\"><code>$ cd src\/app\r\n<\/code><\/pre>\n<p>\u9996\u5148\uff0c\u6211\u5011\u5f9e\u9019\u88e1\u958b\u59cb\u6838\u5fc3\u6a21\u578b\u7684\u5b9a\u7fa9\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kr\">interface<\/span> <span class=\"nx\">BookEntity<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nl\">id<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nl\">author<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nl\">title<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">bookFields<\/span> <span class=\"o\">=<\/span> <span class=\"s2\">`\r\n  id\r\n  title\r\n  author\r\n`<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u53ef\u4ee5\u5199\u4e0e\u670d\u52a1\u5668\u7aef\u76f8\u540c\u7684\u5b9a\u4e49\uff0c\u4f46\u7531\u4e8e\u4e0d\u9700\u8981\u8f93\u5165\u7684\u5b9a\u4e49\uff0c\u6240\u4ee5\u53ea\u9700\u8981bookFields\u7684\u5b9a\u4e49\u5373\u53ef\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\u662fService\u7aef\u7684\u7b2c\u4e00\u79cd\u5b9e\u73b0\u3002<br \/>\n\u9996\u5148\u8c03\u7528\u67e5\u8be2\uff0c\u5e76\u5728queryRef.valueChanges\u4e2d\u63a5\u6536\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">...<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">BookService<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">constructor<\/span><span class=\"p\">(<\/span><span class=\"k\">private<\/span> <span class=\"nx\">apollo<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Apollo<\/span><span class=\"p\">,<\/span> <span class=\"k\">private<\/span> <span class=\"nx\">bookSubs<\/span><span class=\"p\">:<\/span> <span class=\"nx\">BookSubscriber<\/span><span class=\"p\">)<\/span> <span class=\"p\">{}<\/span>\r\n\r\n  <span class=\"nx\">searchBooks<\/span><span class=\"p\">(<\/span><span class=\"nx\">term<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">):<\/span> <span class=\"nx\">Observable<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">String<\/span><span class=\"p\">,<\/span> <span class=\"nx\">BookEntity<\/span><span class=\"o\">&gt;&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"nx\">term<\/span><span class=\"p\">.<\/span><span class=\"nx\">trim<\/span><span class=\"p\">())<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"nx\">term<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">*<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"nx\">queryRef<\/span> <span class=\"o\">=<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">apollo<\/span><span class=\"p\">.<\/span><span class=\"nx\">watchQuery<\/span><span class=\"o\">&lt;<\/span><span class=\"kr\">any<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">({<\/span>\r\n      <span class=\"na\">query<\/span><span class=\"p\">:<\/span> <span class=\"nx\">gql<\/span><span class=\"s2\">`{\r\n          books(author:\"<\/span><span class=\"p\">${<\/span><span class=\"nx\">term<\/span><span class=\"p\">}<\/span><span class=\"s2\">\"){\r\n            <\/span><span class=\"p\">${<\/span><span class=\"nx\">bookFields<\/span><span class=\"p\">}<\/span><span class=\"s2\">\r\n          }\r\n        }`<\/span>\r\n    <span class=\"p\">});<\/span>\r\n    <span class=\"c1\">\/\/ \u8ffd\u52a0\u3067SubScribe<\/span>\r\n    <span class=\"nx\">queryRef<\/span><span class=\"p\">.<\/span><span class=\"nx\">subscribeToMore<\/span><span class=\"p\">(<\/span><span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">bookSubs<\/span><span class=\"p\">.<\/span><span class=\"nx\">subscribeUpdateBooks<\/span><span class=\"p\">());<\/span>\r\n\r\n    <span class=\"k\">return<\/span> <span class=\"nx\">queryRef<\/span><span class=\"p\">.<\/span><span class=\"nx\">valueChanges<\/span><span class=\"p\">.<\/span><span class=\"nx\">pipe<\/span><span class=\"p\">(<\/span>\r\n      <span class=\"nx\">map<\/span><span class=\"p\">(<\/span>\r\n        <span class=\"nx\">result<\/span> <span class=\"o\">=&gt;<\/span>\r\n          <span class=\"nx\">result<\/span><span class=\"p\">.<\/span><span class=\"nx\">data<\/span><span class=\"p\">.<\/span><span class=\"nx\">books<\/span><span class=\"p\">.<\/span><span class=\"nx\">reduce<\/span><span class=\"p\">((<\/span><span class=\"nx\">m<\/span><span class=\"p\">,<\/span> <span class=\"nx\">o<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nx\">m<\/span><span class=\"p\">[<\/span><span class=\"nx\">o<\/span><span class=\"p\">.<\/span><span class=\"nx\">id<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">o<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"k\">return<\/span> <span class=\"nx\">m<\/span><span class=\"p\">;<\/span>\r\n          <span class=\"p\">},<\/span> <span class=\"p\">{})<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">String<\/span><span class=\"p\">,<\/span> <span class=\"nx\">BookEntity<\/span><span class=\"o\">&gt;<\/span>\r\n      <span class=\"p\">)<\/span>\r\n    <span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u901a\u5e38\u7684\u67e5\u8be2\uff08Query\uff09\u4e4b\u540e\u4f7f\u7528watchQuery\u51fd\u6570\uff0c\u5e76\u5411\u8be5QueryRef\u5f15\u7528\u6dfb\u52a0\u4e00\u4e2a\u901a\u8fc7SubscribeToMore\u51fd\u6570\u6765\u76d1\u542c\u7684\u67e5\u8be2\uff08SubscribeToMore\uff09\u3002<br \/>\n\u540e\u7eed\u5c06\u63d0\u4f9bSubscribeToMore\u51fd\u6570\u7684\u5177\u4f53\u5185\u5bb9\u3002<br \/>\n\u5c06\u4ece\u670d\u52a1\u5668\u53d1\u9001\u7684\u7ed3\u679c\u8f6c\u6362\u4e3aMap\u7c7b\u578b\u53ef\u80fd\u4e0d\u592a\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\u662f\u66f4\u65b0\u5904\u7406\u3002<\/p>\n<pre class=\"post-pre\"><code>  <span class=\"nx\">updateBook<\/span><span class=\"p\">(<\/span><span class=\"nx\">id<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">,<\/span> <span class=\"nx\">author<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">,<\/span> <span class=\"nx\">title<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">apollo<\/span>\r\n      <span class=\"p\">.<\/span><span class=\"nx\">mutate<\/span><span class=\"p\">({<\/span>\r\n        <span class=\"na\">mutation<\/span><span class=\"p\">:<\/span> <span class=\"nx\">gql<\/span><span class=\"s2\">`\r\n          mutation CreateBook($book: BookEntry!) {\r\n            book(item: $book) {\r\n              <\/span><span class=\"p\">${<\/span><span class=\"nx\">bookFields<\/span><span class=\"p\">}<\/span><span class=\"s2\">\r\n            }\r\n          }\r\n        `<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"na\">variables<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n          <span class=\"na\">book<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"na\">id<\/span><span class=\"p\">:<\/span> <span class=\"nx\">id<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"na\">author<\/span><span class=\"p\">:<\/span> <span class=\"nx\">author<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"na\">title<\/span><span class=\"p\">:<\/span> <span class=\"nx\">title<\/span>\r\n          <span class=\"p\">}<\/span>\r\n        <span class=\"p\">}<\/span>\r\n      <span class=\"p\">})<\/span>\r\n      <span class=\"p\">.<\/span><span class=\"nx\">subscribe<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">apollo<\/span><span class=\"p\">.<\/span><span class=\"nx\">getClient<\/span><span class=\"p\">().<\/span><span class=\"nx\">cache<\/span><span class=\"p\">.<\/span><span class=\"nx\">reset<\/span><span class=\"p\">();<\/span>\r\n      <span class=\"p\">});<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4f7f\u7528 mutate \u65b9\u6cd5\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u4f20\u9012\u7ed9 variables \u7684\u3002\u5f53\u7136\uff0c\u8fd9\u4e2a\u53c2\u6570\u7684\u7ed3\u6784\u5fc5\u987b\u6309\u7167 GraphQL schema \u7684\u8981\u6c42\u8fdb\u884c\u8bbe\u7f6e\u3002\u7531\u4e8e\u5b83\u662f any \u7c7b\u578b\uff0c\u6240\u4ee5\u65e0\u6cd5\u5728 VS Code \u4e2d\u4eab\u53d7\u5230\u4ee3\u7801\u81ea\u52a8\u8865\u5168\u7684\u597d\u5904\uff0c\u8fd9\u662f\u4e00\u4e2a\u4e0d\u592a\u65b9\u4fbf\u7684\u5730\u65b9\u3002\u4ece GraphQL \u670d\u52a1\u5668\u7684\u793a\u4f8b\u9875\u9762\u4e2d\u590d\u5236\u5e76\u7c98\u8d34\u4f1a\u5f88\u597d\u3002<br \/>\n\u53d1\u9001 Mutation \u67e5\u8be2\u540e\uff0c\u6709\u66f4\u65b0\u7684\u8bb0\u5f55\u5c06\u901a\u8fc7 SubScription \u8fdb\u884c\u901a\u77e5\u3002\u56e0\u6b64\uff0c\u5728\u8fd9\u91cc\u6211\u4eec\u53ea\u9700\u8981\u6e05\u9664\u8fd4\u56de\u503c\uff0c\u800c\u4e0d\u9700\u8981\u63a5\u6536\u5b83\uff0c\u5e76\u6e05\u9664 apollo \u67e5\u8be2\u7f13\u5b58\u3002<br \/>\n\u5220\u9664\u64cd\u4f5c\u4e5f\u662f\u540c\u6837\u7684\u539f\u7406\uff0c\u7701\u7565\u4e0d\u63d0\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\u662fSubScription\u7684\u90e8\u5206\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">...<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">BOOKS_SUBSCRIPTION<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">gql<\/span><span class=\"s2\">`\r\n  subscription bookChanged{\r\n    bookChanged{\r\n      <\/span><span class=\"p\">${<\/span><span class=\"nx\">bookFields<\/span><span class=\"p\">}<\/span><span class=\"s2\">\r\n    }\r\n  }\r\n`<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"p\">@<\/span><span class=\"nd\">Injectable<\/span><span class=\"p\">({<\/span>\r\n  <span class=\"na\">providedIn<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">root<\/span><span class=\"dl\">'<\/span>\r\n<span class=\"p\">})<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">BookSubscriber<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">subscribeUpdateBooks<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">T<\/span> <span class=\"kd\">extends<\/span> <span class=\"nx\">BookEntity<\/span><span class=\"p\">[]<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"p\">{<\/span>\r\n      <span class=\"na\">document<\/span><span class=\"p\">:<\/span> <span class=\"nx\">BOOKS_SUBSCRIPTION<\/span><span class=\"p\">,<\/span>\r\n      <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        <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=\"p\">{<\/span>\r\n          <span class=\"k\">return<\/span> <span class=\"nx\">prev<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"p\">}<\/span>\r\n        <span class=\"kd\">const<\/span> <span class=\"nx\">bookEntry<\/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\">bookChanged<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">bookEntry<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n          <span class=\"kd\">const<\/span> <span class=\"nx\">books<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">prev<\/span><span class=\"p\">.<\/span><span class=\"nx\">books<\/span> <span class=\"k\">as<\/span> <span class=\"nx\">T<\/span><span class=\"p\">;<\/span>\r\n          <span class=\"kd\">const<\/span> <span class=\"nx\">targets<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">books<\/span><span class=\"p\">.<\/span><span class=\"nx\">filter<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">e<\/span><span class=\"p\">.<\/span><span class=\"nx\">id<\/span> <span class=\"o\">==<\/span> <span class=\"nx\">bookEntry<\/span><span class=\"p\">.<\/span><span class=\"nx\">id<\/span><span class=\"p\">);<\/span>\r\n          <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"nx\">targets<\/span><span class=\"p\">.<\/span><span class=\"nx\">length<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nx\">books<\/span><span class=\"p\">.<\/span><span class=\"nx\">push<\/span><span class=\"p\">(<\/span><span class=\"nx\">bookEntry<\/span><span class=\"p\">);<\/span>\r\n          <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"k\">delete<\/span> <span class=\"nx\">books<\/span><span class=\"p\">[<\/span><span class=\"nx\">books<\/span><span class=\"p\">.<\/span><span class=\"nx\">indexOf<\/span><span class=\"p\">(<\/span><span class=\"nx\">targets<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">])];<\/span>\r\n          <span class=\"p\">}<\/span>\r\n          <span class=\"k\">return<\/span> <span class=\"nx\">prev<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n          <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nx\">error<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">called updateQuery but bookChanged is null...<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"p\">}<\/span>\r\n      <span class=\"p\">}<\/span>\r\n    <span class=\"p\">};<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u7684\u68d8\u624b\u4e4b\u5904\u5728\u4e8e\uff0cQuery\u51fd\u6570\u63a5\u6536\u4e00\u4e2a\u6570\u7ec4\u4f5c\u4e3a\u8f93\u5165\uff0c\u800cSubscription\u51fd\u6570\u53ea\u4f1a\u6536\u5230\u5355\u4e2a\u8bb0\u5f55\u3002prev.books\u4e2d\u5305\u542b\u4e86Query\u7ed3\u679c\u7684\u5217\u8868\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u5c06\u6536\u5230\u7684\u5355\u4e2a\u8bb0\u5f55\u4e0e\u6574\u4e2a\u5217\u8868\u8fdb\u884c\u6b63\u786e\u7684\u7ef4\u62a4\u3002\u6709\u70b9\u50cf\u91cd\u590d\u52b3\u52a8\u7684\u611f\u89c9&#8230;<\/p>\n<p>\u6700\u7ec8\u662f\u4f5c\u4e3aView\u540e\u53f0\u7684\u7ec4\u4ef6\u3002\u7531\u4e8eQuery\u548cSubscription\u4e4b\u95f4\u7684\u901a\u4fe1\u5173\u7cfb\u76f8\u5bf9\u758f\u8fdc\uff0c\u8fd9\u91cc\u611f\u89c9\u975e\u5e38\u6e05\u723d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Component<\/span><span class=\"p\">,<\/span> <span class=\"nx\">OnInit<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">@angular\/core<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Observable<\/span><span class=\"p\">,<\/span> <span class=\"nx\">Subject<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">rxjs<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">debounceTime<\/span><span class=\"p\">,<\/span> <span class=\"nx\">switchMap<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">rxjs\/operators<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">BookEntity<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">..\/service\/book<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">BookService<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">..\/service\/book.service<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"p\">@<\/span><span class=\"nd\">Component<\/span><span class=\"p\">({<\/span>\r\n  <span class=\"na\">selector<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">app-root<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">templateUrl<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/app.component.html<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">styleUrls<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">.\/app.component.scss<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\r\n<span class=\"p\">})<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"kd\">class<\/span> <span class=\"nx\">AppComponent<\/span> <span class=\"k\">implements<\/span> <span class=\"nx\">OnInit<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">title<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">GraphQLBooks<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nl\">books<\/span><span class=\"p\">:<\/span> <span class=\"nx\">Observable<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">String<\/span><span class=\"p\">,<\/span> <span class=\"nx\">BookEntity<\/span><span class=\"o\">&gt;&gt;<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"k\">private<\/span> <span class=\"nx\">searchTerms<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nx\">Subject<\/span><span class=\"o\">&lt;<\/span><span class=\"kr\">string<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">();<\/span>\r\n\r\n  <span class=\"kd\">constructor<\/span><span class=\"p\">(<\/span><span class=\"k\">private<\/span> <span class=\"nx\">service<\/span><span class=\"p\">:<\/span> <span class=\"nx\">BookService<\/span><span class=\"p\">)<\/span> <span class=\"p\">{}<\/span>\r\n\r\n  <span class=\"nx\">search<\/span><span class=\"p\">(<\/span><span class=\"nx\">term<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">):<\/span> <span class=\"k\">void<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">searchTerms<\/span><span class=\"p\">.<\/span><span class=\"nx\">next<\/span><span class=\"p\">(<\/span><span class=\"nx\">term<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nx\">ngOnInit<\/span><span class=\"p\">():<\/span> <span class=\"k\">void<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">books<\/span> <span class=\"o\">=<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">searchTerms<\/span><span class=\"p\">.<\/span><span class=\"nx\">pipe<\/span><span class=\"p\">(<\/span>\r\n      <span class=\"nx\">debounceTime<\/span><span class=\"p\">(<\/span><span class=\"mi\">300<\/span><span class=\"p\">),<\/span>\r\n      <span class=\"nx\">switchMap<\/span><span class=\"p\">((<\/span><span class=\"na\">term<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">service<\/span><span class=\"p\">.<\/span><span class=\"nx\">searchBooks<\/span><span class=\"p\">(<\/span><span class=\"nx\">term<\/span><span class=\"p\">))<\/span>\r\n    <span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nx\">add<\/span><span class=\"p\">(<\/span><span class=\"nx\">author<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">,<\/span> <span class=\"nx\">title<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">service<\/span><span class=\"p\">.<\/span><span class=\"nx\">updateBook<\/span><span class=\"p\">(<\/span><span class=\"dl\">''<\/span><span class=\"p\">,<\/span> <span class=\"nx\">author<\/span><span class=\"p\">,<\/span> <span class=\"nx\">title<\/span><span class=\"p\">).<\/span><span class=\"nx\">unsubscribe<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nx\">update<\/span><span class=\"p\">(<\/span><span class=\"nx\">id<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">,<\/span> <span class=\"nx\">author<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">,<\/span> <span class=\"nx\">title<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">service<\/span><span class=\"p\">.<\/span><span class=\"nx\">updateBook<\/span><span class=\"p\">(<\/span><span class=\"nx\">id<\/span><span class=\"p\">,<\/span> <span class=\"nx\">author<\/span><span class=\"p\">,<\/span> <span class=\"nx\">title<\/span><span class=\"p\">).<\/span><span class=\"nx\">unsubscribe<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"p\">}<\/span>\r\n\r\n  <span class=\"nx\">remove<\/span><span class=\"p\">(<\/span><span class=\"nx\">id<\/span><span class=\"p\">:<\/span> <span class=\"kr\">string<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"p\">.<\/span><span class=\"nx\">service<\/span><span class=\"p\">.<\/span><span class=\"nx\">removeBook<\/span><span class=\"p\">(<\/span><span class=\"nx\">id<\/span><span class=\"p\">).<\/span><span class=\"nx\">unsubscribe<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7531\u4e8e\u89c6\u56fe\u7684HTML\u4ee3\u7801\u7cdf\u7cd5\uff0c\u6211\u4eec\u5c06\u7701\u7565\u5176\u53d1\u5e03&#8230;<\/p>\n<p>\u5f53\u4e00\u5207\u5b9e\u73b0\u5b8c\u6210\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7ng start\u542f\u52a8Angular\u670d\u52a1\u5668\u3002<\/p>\n<p>\u8ba9\u6211\u4eec\u4ece\u6d4f\u89c8\u5668\u6253\u5f00 http:\/\/localhost:4200 \u5e76\u68c0\u67e5\u5176\u8fd0\u884c\u60c5\u51b5\u3002<\/p>\n<h1>\u6700\u540e<\/h1>\n<p>\u6211\u5728\u8fd9\u6b21\u4e2d\u6ca1\u6709\u627e\u5230\u5173\u4e8eSubscription\u7684\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u6240\u4ee5\u7ecf\u8fc7\u4e86\u4e00\u756a\u8bd5\u9519\u3002<br \/>\n\u901a\u8fc7\u67e5\u770b\u7c7b\u4f3cGithub\u7684API\uff0c\u786e\u5b9e\u611f\u89c9\u4e4b\u524d\u7684REST API\u6709\u4e9b\u56f0\u96be\u5462&#8230;\u80fd\u591f\u4f20\u8fbe\u8fd9\u4e2a\u611f\u89c9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f7f\u7528Apollo + Express + Angular \u8fdb\u884cGraphQL\u670d\u52a1\u5668\u5b9e\u73b0\u3002 \u636e\u8bf4GraphQL\u7684 [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47950","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>\u30102019\u5e742\u6708\u672b\u7248\u3011Apollo + Express + Angular\u5b9e\u73b0GraphQL Pub\/Sub \u301c \u597d\u597d\u5730\u4f7f\u7528Subscription - 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\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u30102019\u5e742\u6708\u672b\u7248\u3011apollo-express-angular\u5b9e\u73b0graphql-pub-sub-\u301c-\u597d\u597d\u5730\u4f7f\u7528subscription\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u30102019\u5e742\u6708\u672b\u7248\u3011Apollo + Express + Angular\u5b9e\u73b0GraphQL Pub\/Sub \u301c \u597d\u597d\u5730\u4f7f\u7528Subscription\" \/>\n<meta property=\"og:description\" content=\"\u4f7f\u7528Apollo + Express + Angular \u8fdb\u884cGraphQL\u670d\u52a1\u5668\u5b9e\u73b0\u3002 \u636e\u8bf4GraphQL\u7684 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u30102019\u5e742\u6708\u672b\u7248\u3011apollo-express-angular\u5b9e\u73b0graphql-pub-sub-\u301c-\u597d\u597d\u5730\u4f7f\u7528subscription\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-22T12:21:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T00:31:38+00:00\" \/>\n<meta name=\"author\" content=\"\u9038, \u79d1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u9038, \u79d1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 \u5206\" \/>\n<script type=\"application\/ld+json\" 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