{"id":47689,"date":"2023-12-20T21:35:36","date_gmt":"2022-11-25T05:19:39","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8amplify%e6%a1%86%e6%9e%b6%e8%b0%83%e7%94%a8graphql-api%e3%80%82\/"},"modified":"2024-05-04T14:31:47","modified_gmt":"2024-05-04T06:31:47","slug":"%e4%bd%bf%e7%94%a8amplify%e6%a1%86%e6%9e%b6%e8%b0%83%e7%94%a8graphql-api%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8amplify%e6%a1%86%e6%9e%b6%e8%b0%83%e7%94%a8graphql-api%e3%80%82\/","title":{"rendered":"\u4f7f\u7528Amplify\u6846\u67b6\u8c03\u7528GraphQL API"},"content":{"rendered":"

\u7b80\u800c\u8a00\u4e4b<\/h2>\n

\u672c\u7bc7\u6587\u7ae0\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528Amplify\u6846\u67b6\u8bbf\u95eeGraphQL API\u3002
\n\u7531\u4e8eGraphQL\u7684\u67b6\u6784\u5df2\u7ecf\u51c6\u5907\u597d\uff0c\u6211\u4eec\u5c06\u4e3b\u8981\u5217\u4e3e\u524d\u7aef\u4e0e\u540e\u7aef\u8fdb\u884c\u8fde\u63a5\u65f6\u7684\u5177\u4f53\u4ee3\u7801\u3002<\/p>\n

\u5b9e\u8df5<\/h2>\n

\u5f53\u4f60\u4f7f\u7528Amplify CLI\u6784\u5efaAPI\u65f6\uff0c\u4f1a\u751f\u6210\u4e09\u4e2a\u6587\u4ef6\uff1aqueries.js\u3001mutations.js\u548csubscriptions.js\u3002\u6bcf\u4e2a\u67e5\u8be2\u3001\u53d8\u66f4\u548c\u8ba2\u9605\u90fd\u4ee5\u6a21\u5757\u7684\u5f62\u5f0f\u5bfc\u51fa\uff0c\u56e0\u6b64\u4f60\u53ef\u4ee5\u4ece\u8c03\u7528\u65b9\u7684\u6587\u4ef6\u4e2d\u5bfc\u5165\u6240\u9700\u7684\u5185\u5bb9\u3002\u5982\u679c\u76f4\u63a5\u5bfc\u5165\uff0c\u5c06\u5305\u542b\u6240\u6709\u5b57\u6bb5\uff0c\u5982\u679c\u53ea\u60f3\u83b7\u53d6\u5fc5\u8981\u7684\u5b57\u6bb5\uff0c\u53ef\u4ee5\u5220\u9664\u5b57\u6bb5\u6216\u5c06\u5176\u5199\u5165\u5230\u5176\u4ed6\u6587\u4ef6\u4e2d\u3002\u5728\u4ee5\u4e0b\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5047\u8bbe\u4f7f\u7528Nuxt\u9879\u76ee\uff0c\u5728\u5b58\u50a8\u6587\u4ef6\u4e2d\u6267\u884cGraphQL\u7684\u5404\u4e2a\u64cd\u4f5c\uff0c\u4f46\u65e0\u8bba\u662f\u4eceVue\u7684App.vue\u8fd8\u662f\u4eceReact\u7684App.js\uff0c\u57fa\u672c\u7684graphql\u65b9\u6cd5\u7684\u7f16\u5199\u65b9\u5f0f\u90fd\u662f\u76f8\u540c\u7684\u3002<\/p>\n

import<\/span> {<\/span> API<\/span>,<\/span> graphqlOperation<\/span> }<\/span> from<\/span> '<\/span>aws-amplify<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> createTodo<\/span> }<\/span> from<\/span> '<\/span>.\/graphql\/mutations<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> listTodos<\/span> }<\/span> from<\/span> '<\/span>.\/graphql\/queries<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> onCreateTodo<\/span> }<\/span> from<\/span> '<\/span>.\/graphql\/subscriptions<\/span>'<\/span>;<\/span>\r\n\r\nexport<\/span> const<\/span> state<\/span> =<\/span> ()<\/span> =><\/span> ({<\/span>\r\n  todos<\/span>:[]<\/span> ,<\/span>\r\n  subscription<\/span>:<\/span> null<\/span>\r\n})<\/span>\r\n\r\nexport<\/span> const<\/span> mutations<\/span> =<\/span> {<\/span>\r\n \/**\r\n   * \u53d6\u5f97\u3057\u305ftodo\u30c7\u30fc\u30bf\u3092state\u306b\u30bb\u30c3\u30c8\r\n   *\/<\/span>\r\n  setTodos<\/span>(<\/span>state<\/span>,<\/span> Todo<\/span>)<\/span> {<\/span>\r\n    state<\/span>.<\/span>todos<\/span> =<\/span> todo<\/span>\r\n  },<\/span>\r\n \/**\r\n   * \u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u30bb\u30c3\u30c8\r\n   *\/<\/span>\r\n  setSubscription<\/span>(<\/span>state<\/span>,<\/span> subscription<\/span>)<\/span> {<\/span>\r\n    state<\/span>.<\/span>subscription<\/span> =<\/span> subscription<\/span>\r\n  },<\/span>\r\n}<\/span>\r\n\r\nexport<\/span> const<\/span> actions<\/span> =<\/span> {<\/span>\r\n  \/**\r\n   * Todo\u4e00\u89a7\u3092\u53d6\u5f97\r\n   *\/<\/span>\r\n  async<\/span> listTodos<\/span>({<\/span> state<\/span>,<\/span> commit<\/span> })<\/span> {<\/span>\r\n    try<\/span> {<\/span>\r\n      const<\/span> {<\/span> data<\/span> }<\/span> =<\/span> await<\/span> API<\/span>.<\/span>graphql<\/span>(<\/span>graphqlOperation<\/span>(<\/span>listTodos<\/span>))<\/span>\r\n      commit<\/span>(<\/span>'<\/span>setTodos<\/span>'<\/span>,<\/span> data<\/span>.<\/span>listTodos<\/span>.<\/span>items<\/span>)<\/span>\r\n    }<\/span> catch<\/span> (<\/span>e<\/span>)<\/span> {<\/span>\r\n      console<\/span>.<\/span>error<\/span>(<\/span>e<\/span>)<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n  \/**\r\n   * Todo\u3092\u4f5c\u6210\r\n   *\/<\/span>\r\n  async<\/span> createTodo<\/span>(<\/span>context<\/span>,<\/span> {<\/span> todo<\/span> })<\/span> {<\/span>\r\n    try<\/span> {<\/span>\r\n      await<\/span> API<\/span>.<\/span>graphql<\/span>(<\/span>\r\n        graphqlOperation<\/span>(<\/span>createTodo<\/span>,<\/span> {<\/span>\r\n          input<\/span>:{<\/span>\r\n            name<\/span>:<\/span> todo<\/span>.<\/span>name<\/span>,<\/span>\r\n            description<\/span>:<\/span> todo<\/span>.<\/span>description<\/span>,<\/span>\r\n            priority<\/span>:<\/span> todo<\/span>.<\/span>priority<\/span>\r\n          }<\/span>\r\n        })<\/span>\r\n      )<\/span>\r\n    }<\/span> catch<\/span> (<\/span>e<\/span>)<\/span> {<\/span>\r\n      console<\/span>.<\/span>error<\/span>(<\/span>e<\/span>)<\/span>\r\n    }<\/span>\r\n  },<\/span>\r\n  \/**\r\n   * Todo\u306e\u4f5c\u6210\u3092\u8cfc\u8aad\r\n   *\/<\/span>\r\n  async<\/span> subscribe<\/span>({<\/span> state<\/span>,<\/span> commit<\/span> })<\/span> {<\/span>\r\n    const<\/span> subscription<\/span> =<\/span> await<\/span> API<\/span>.<\/span>graphql<\/span>(<\/span>graphqlOperation<\/span>(<\/span>onCreateTodo<\/span>)).<\/span>subscribe<\/span>({<\/span>\r\n      next<\/span>:<\/span> eventData<\/span> =><\/span> {<\/span>\r\n        const<\/span> todo<\/span> =<\/span> eventData<\/span>.<\/span>value<\/span>.<\/span>data<\/span>.<\/span>onCreateTodo<\/span>\r\n        commit<\/span>(<\/span>'<\/span>updateTodos<\/span>'<\/span>,<\/span> [...<\/span>state<\/span>.<\/span>todos<\/span>,<\/span> todo<\/span>])<\/span>\r\n      }<\/span>\r\n    })<\/span>\r\n    commit<\/span>(<\/span>'<\/span>setSubscription<\/span>'<\/span>,<\/span> subscription<\/span>)<\/span>\r\n  },<\/span>\r\n  \/**\r\n   * Todo\u4f5c\u6210\u306e\u8cfc\u8aad\u89e3\u9664\r\n   *\/<\/span>\r\n  unsubscribe<\/span>({<\/span> state<\/span> })<\/span> {<\/span>\r\n    if<\/span> (<\/span>!<\/span>state<\/span>.<\/span>subscription<\/span>)<\/span> return<\/span>\r\n    state<\/span>.<\/span>subscription<\/span>.<\/span>unsubscribe<\/span>()<\/span>\r\n  },<\/span>\r\n\r\n<\/code><\/pre>\n
\u9996\u5148\uff0c\u5728\u6587\u4ef6\u7684\u5f00\u5934\u5bfc\u5165\u6240\u9700\u7684\u6a21\u5757\u3002<\/p>\n
import<\/span> {<\/span> API<\/span>,<\/span> graphqlOperation<\/span> }<\/span> from<\/span> '<\/span>aws-amplify<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> createTodo<\/span> }<\/span> from<\/span> '<\/span>.\/graphql\/mutations<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> listTodos<\/span> }<\/span> from<\/span> '<\/span>.\/graphql\/queries<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> onCreateTodo<\/span> }<\/span> from<\/span> '<\/span>.\/graphql\/subscriptions<\/span>'<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u6309\u7167\u4ee5\u4e0b\u7684\u65b9\u5f0f\u7f16\u5199graphql\u65b9\u6cd5\uff0c\u53ea\u9700\u8981\u5bfc\u5165API\u5373\u53ef\uff0c\u4f46\u662f\u4e3a\u4e86\u66f4\u7b80\u6d01\u5730\u7f16\u5199\uff0c\u6211\u4eec\u8fd8\u4f1a\u5bfc\u5165graphqlOperation\u3002<\/p>\n
\r\n  await<\/span> API<\/span>.<\/span>graphql<\/span>({<\/span>\r\n        query<\/span>:<\/span> createTodo<\/span>,<\/span>\r\n        variables<\/span>:<\/span> {<\/span>input<\/span>:<\/span> todo<\/span>},<\/span>\r\n      });<\/span>\r\n<\/code><\/pre>\n
\u4e3a\u4e86\u51cf\u5c0f\u6346\u7ed1\u5927\u5c0f\uff0c\u60a8\u8fd8\u53ef\u4ee5\u9009\u62e9\u4ec5\u5bfc\u5165\u7279\u5b9a\u7c7b\u522b\uff08\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u662fapi\uff09\u3002<\/p>\n
import<\/span> API<\/span> from<\/span> '<\/span>@aws-amplify\/api<\/span>'<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u5728\u4e2d\u56fd\u7684\u672c\u5730\u8bed\u8a00\uff08\u4e2d\u6587\uff09\u4e2d\uff0c\u5c06\u4e0b\u9762\u7684\u53e5\u5b50\u6539\u8ff0\u4e3a\u5927\u7ea6\u53ea\u6709\u4e00\u79cd\u8bf4\u6cd5\uff1a<\/p>\n
\u4f7f\u7528GraphQL\u7684API\u8c03\u7528\u53ef\u4ee5\u50cf\u8fd9\u6837\u5199\uff1aawait API.graphql(graphqlOperation(\u67e5\u8be2, \u53c2\u6570))\u3002<\/p>\n
const<\/span> {<\/span> data<\/span> }<\/span> =<\/span> await<\/span> API<\/span>.<\/span>graphql<\/span>(<\/span>graphqlOperation<\/span>(<\/span>listTodos<\/span>))<\/span>\r\n      commit<\/span>(<\/span>'<\/span>setTodos<\/span>'<\/span>,<\/span> data<\/span>.<\/span>listTodos<\/span>.<\/span>items<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5c06\u8fd4\u56de\u503c\u8d4b\u503c\u7ed9\u4e00\u4e2a\u540d\u4e3adata\u7684\u5e38\u91cf\uff0c\u5e76\u4ece\u5bf9\u8c61\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u6570\u636e\u4f20\u9012\u7ed9\u540d\u4e3a’setTodos’\u7684mutation(vuex)\u3002
\n\u5728\u6b64\u60c5\u51b5\u4e0b\uff0c\u5047\u8bbeitems\u4e2d\u5b58\u50a8\u4e86\u4e00\u4e2aTodo\u6570\u7ec4\u3002<\/p>\n
await<\/span> API<\/span>.<\/span>graphql<\/span>(<\/span>\r\n        graphqlOperation<\/span>(<\/span>createTodo<\/span>,<\/span> {<\/span>\r\n          input<\/span>:<\/span> {<\/span>\r\n            name<\/span>:<\/span> todo<\/span>.<\/span>name<\/span>,<\/span>\r\n            description<\/span>:<\/span> todo<\/span>.<\/span>description<\/span>,<\/span>\r\n            priority<\/span>:<\/span> todo<\/span>.<\/span>priority<\/span>\r\n            due<\/span>:<\/span> todo<\/span>.<\/span>due<\/span>\r\n          }<\/span>\r\n        })<\/span>\r\n      )<\/span>\r\n<\/code><\/pre>\n
\u5728Todo\u7684\u521b\u5efa\u4e2d\uff0c\u4f20\u9012\u4e86\u53c2\u6570\u3002
\n\u53c2\u6570\u4ee5\u5bf9\u8c61\u7684\u5f62\u5f0f\u8fdb\u884c\u63cf\u8ff0\uff0cinput\u5c5e\u6027\u7684\u503c\u5b58\u50a8\u4e86\u4e00\u4e2a\u5305\u542b\u591a\u4e2a\u5c5e\u6027\u7684\u5bf9\u8c61\u3002
\n\u4ee5createTodo\u51fd\u6570\u548c\u540d\u4e3ainput\u7684\u53d8\u91cf\u540d\u7684\u5bf9\u8c61\u8fdb\u884c\u4f20\u9012\u3002
\n\u4ee5\u4e0b\u662fmutations.js\u6587\u4ef6\u4e2d\u7684\u67e5\u8be2\u8bed\u8a00\u3002<\/p>\n
export<\/span> const<\/span> createTodo<\/span> =<\/span> \/* GraphQL *\/<\/span> `\r\n  mutation CreateTodo($input: CreateTodoInput!) {\r\n    createTodo(input: $input) {\r\n      id\r\n      name\r\n      description\r\n      priority\r\n      due\r\n    }\r\n  }\r\n`<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u76f4\u63a5\u3053\u306e\uff04input\u5909\u6570\u306b\u5148\u307b\u3069\u306einput\u306e\u5024\u3092\u4ee3\u5165\u3057\u307e\u3059\u3002<\/p>\n
await<\/span> API<\/span>.<\/span>graphql<\/span>(<\/span>\r\n        graphqlOperation<\/span>(<\/span>createTodo<\/span>,<\/span> {<\/span>\r\n          name<\/span>:<\/span> todo<\/span>.<\/span>name<\/span>,<\/span>\r\n          description<\/span>:<\/span> todo<\/span>.<\/span>description<\/span>\r\n        })<\/span>\r\n      )<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u6309\u7167\u8fd9\u6837\u5199\u7684\u8bdd\uff0c\u8fd8\u9700\u8981\u4fee\u6539\u6a21\u5f0f\u8bed\u8a00\u65b9\u9762\u7684\u4ee3\u7801\u3002<\/p>\n
export<\/span> const<\/span> createTodo<\/span> =<\/span> \/* GraphQL *\/<\/span> `\r\n  mutation CreateTodo($input: CreateTodoInput!) {\r\n    createTodo(input: {name:$name, description:$description}) {\r\n      id\r\n      name\r\n      description\r\n      priority\r\n      due\r\n    }\r\n  }\r\n`<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u901a\u8fc7\u4e24\u4e2a\u53d8\u91cf$name\u548c$description\u5206\u522b\u63a5\u6536\u503c\u3002\u5c3d\u7ba1\u8fd9\u79cd\u5199\u6cd5\u53ef\u80fd\u663e\u5f97\u5197\u957f\uff0c\u4f46\u5728\u5e0c\u671b\u660e\u786e\u63a5\u6536\u503c\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u79cd\u65b9\u5f0f\u5728\u6a21\u5f0f\u8bed\u8a00\u4e2d\u5199\u4f5c\u3002<\/p>\n
\u7531\u4e8e\u521b\u5efa\u4e86\u65b0\u7684todo\uff0c\u60a8\u5e94\u8be5\u7acb\u5373\u663e\u793a\u6240\u521b\u5efa\u7684\u5185\u5bb9\uff0c\u4f46\u5728\u4e0a\u8ff0\u5b58\u50a8\u6587\u4ef6\u4e2d\uff0c\u6ca1\u6709\u4f7f\u7528\u5e38\u91cf\u7b49\u6765\u63a5\u6536createTodo\u7684\u8fd4\u56de\u503c\uff0c\u4e5f\u6ca1\u6709\u8c03\u7528mutation\uff08vuex\uff09\u3002
\n\u8fd9\u662f\u56e0\u4e3a\u6b63\u5728\u901a\u8fc7subscription\u8ba2\u9605todo\u7684\u521b\u5efa\u4e8b\u4ef6\u3002<\/p>\n
const<\/span> subscription<\/span> =<\/span> await<\/span> API<\/span>.<\/span>graphql<\/span>(<\/span>graphqlOperation<\/span>(<\/span>onCreateTodo<\/span>)).<\/span>subscribe<\/span>({<\/span>\r\n      next<\/span>:<\/span> eventData<\/span> =><\/span> {<\/span>\r\n        const<\/span> todo<\/span> =<\/span> eventData<\/span>.<\/span>value<\/span>.<\/span>data<\/span>.<\/span>onCreateTodo<\/span>\r\n        commit<\/span>(<\/span>'<\/span>updateTodos<\/span>'<\/span>,<\/span> [...<\/span>state<\/span>.<\/span>todos<\/span>,<\/span> todo<\/span>])<\/span>\r\n      }<\/span>\r\n    })<\/span>\r\n    commit<\/span>(<\/span>'<\/span>setSubscription<\/span>'<\/span>,<\/span> subscription<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5728\u4e2d\u95f4\uff0c\u67e5\u8be2\u548c\u53d8\u66f4\u7684\u5199\u6cd5\u4e0e\u4e4b\u524d\u76f8\u540c\uff0c\u4f46\u5728API.graphql()\u4e4b\u540e\uff0c\u4f1a\u4f7f\u7528\u65b9\u6cd5\u94fe\u7ee7\u7eed\u8c03\u7528subscribe()\u3002
\n\u5728\u5176\u4e2d\uff0c\u8fd8\u4f1a\u63a5\u7740\u4f7f\u7528next:\uff0c\u5e76\u5728\u7bad\u5934\u51fd\u6570\u4e2d\u7f16\u5199\u4f7f\u7528\u63a5\u6536\u5230\u7684\u6570\u636e\u7684\u5904\u7406\u903b\u8f91\u3002
\n\u6240\u8c13\u7684\u63a5\u6536\u5230\u7684\u6570\u636e\u662f\u6307\u5728onCreateTodo\u89e6\u53d1\u65f6\u8fd4\u56de\u7684\u9009\u62e9\u96c6\u4e2d\u6307\u5b9a\u7684\u5b57\u6bb5\u7684\u6570\u636e\u3002
\n\u5728\u8fd9\u91cc\uff0c\u6570\u636e\u88ab\u4ee5eventData\u7684\u540d\u79f0\u63a5\u6536\uff0c\u5e76\u5d4c\u5957\u5728value\u2192data\u2192onCreateTodo\u4e2d\uff0c\u6700\u7ec8\u53ef\u4ee5\u83b7\u53d6\u5230\u5df2\u521b\u5efa\u7684todo\u6570\u636e\u3002
\n\u5982\u679c\u5c06\u8fd9\u4e9b\u6570\u636e\u4f20\u9012\u7ed9mutation(vuex)\uff0c\u5b83\u5c06\u5e2e\u52a9\u6211\u4eec\u66f4\u65b0state\u4e2d\u7684todos\uff0c\u6240\u4ee5\u5728createTodo\u4e2d\u4e0d\u9700\u8981\u8fdb\u884ccommit\uff08\u4e5f\u4e0d\u9700\u8981\uff09\u3002
\n\u90a3\u4e48\uff0c\u6211\u4eec\u6240\u63a5\u6536\u7684subscription\u5e38\u91cf\u53c8\u662f\u4ec0\u4e48\u5462\uff1f
\n\u8fd9\u662f\u4e3a\u4e86\u505c\u6b62\u8ba2\u9605\u4e8b\u4ef6\uff08\u53d6\u6d88\u8ba2\u9605\uff09\u800c\u63a5\u6536\u7684Subscription\u63a5\u53e3\u3002
\n\u901a\u8fc7\u5c06\u5176\u4fdd\u5b58\u5728state\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u4efb\u610f\u65f6\u95f4\u70b9\u8c03\u7528\u53d6\u6d88\u8ba2\u9605\u5904\u7406(unsubscribe)\u3002<\/p>\n
unsubscribe<\/span>({<\/span> state<\/span> })<\/span> {<\/span>\r\n    if<\/span> (<\/span>!<\/span>state<\/span>.<\/span>subscription<\/span>)<\/span> return<\/span>\r\n    state<\/span>.<\/span>subscription<\/span>.<\/span>unsubscribe<\/span>()<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4e0d\u6267\u884c\u8fd9\u4e2a\u53d6\u6d88\u8ba2\u9605\u64cd\u4f5c\uff0c\u90a3\u4e48\u4ece\u8ba2\u9605\u5f00\u59cb\uff0c\u4e8b\u4ef6\u5c06\u4e00\u76f4\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\uff0c\u6240\u4ee5\u9700\u8981\u5728\u5b9e\u4f8b\u5220\u9664\u65f6\uff08\u4f8b\u5982 Nuxt \u4e2d\u7684 destroyed \u94a9\u5b50\uff09\u6216\u5176\u4ed6\u76f8\u5e94\u7684\u65f6\u673a\u8c03\u7528\u6b64\u8fc7\u7a0b\u3002<\/p>\n
\u603b\u7ed3<\/h2>\n
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