{"id":47513,"date":"2023-12-25T04:44:37","date_gmt":"2023-02-23T02:18:55","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/"},"modified":"2024-05-04T15:15:57","modified_gmt":"2024-05-04T07:15:57","slug":"%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/","title":{"rendered":"\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b"},"content":{"rendered":"

\u6211\u662f\u4e00\u4e2a\u521d\u5b66\u8005\u3002\u6211\u53ea\u662f\u6309\u7167\u8fd9\u4e2a\u6559\u7a0b\u81ea\u5df1\u5c1d\u8bd5\uff0c\u5e76\u5c06\u7ed3\u679c\u4ee5\u5907\u5fd8\u5f55\u7684\u5f62\u5f0f\u5199\u4e0b\u6765\u3002\u8bf7\u591a\u5173\u7167\u3002<\/p>\n

\u5f00\u59cb\u4f7f\u7528GraphQL.js | GraphQL.js\u6559\u7a0b<\/p>\n

\n

\u5b66\u4e60\u5982\u4f55\u4f7f\u7528GraphQL.js<\/h1>\n

GraphQL.js\u7684\u5b89\u88c5<\/p>\n

yarn add graphql\r\n<\/code><\/pre>\n
const<\/span> {<\/span> graphql<\/span>,<\/span> buildSchema<\/span> }<\/span> =<\/span> require<\/span>(<\/span>'<\/span>graphql<\/span>'<\/span>);<\/span>\r\n\r\n\/\/ GraphQL\u30b9\u30ad\u30fc\u30de\u8a00\u8a9e\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b9\u30ad\u30fc\u30de\u3092\u69cb\u7bc9<\/span>\r\nconst<\/span> schema<\/span> =<\/span> buildSchema<\/span>(<\/span>`\r\n  type Query {\r\n    hello: String\r\n  }\r\n`<\/span>);<\/span>\r\n\r\n\/\/ \u30eb\u30fc\u30c8\u306f\u5404API\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u30ea\u30be\u30eb\u30d0\u30fc\u6a5f\u80fd\u3092\u63d0\u4f9b\u3059\u308b<\/span>\r\nconst<\/span> root<\/span> =<\/span> {<\/span>\r\n  hello<\/span>:<\/span> ()<\/span> =><\/span> {<\/span>\r\n    return<\/span> '<\/span>Hello world!<\/span>'<\/span>;<\/span>\r\n  },<\/span>\r\n};<\/span>\r\n\r\n\/\/ GraphQL\u30af\u30a8\u30ea '{ hello }' \u3092\u5b9f\u884c\u3057\u3066\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u51fa\u529b<\/span>\r\ngraphql<\/span>(<\/span>schema<\/span>,<\/span> '<\/span>{ hello }<\/span>'<\/span>,<\/span> root<\/span>).<\/span>then<\/span>((<\/span>response<\/span>)<\/span> =><\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>response<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
$<\/span> node server.js \r\n{ data: [Object: null prototype] { hello: 'Hello world!' } }\r\n<\/span><\/code><\/pre>\n
\u8fd0\u884c\u4e00\u4e2a Express GraphQL \u670d\u52a1\u5668<\/h1>\n
\u5b89\u88c5\u5fc5\u9700\u7684\u5e93\u4ee5\u5728Express\u4e2d\u6267\u884c\u3002<\/p>\n
yarn add express express-graphql graphql\r\n<\/code><\/pre>\n
\u521b\u5efaAPI\u670d\u52a1\u5668<\/p>\n
const<\/span> express<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express<\/span>'<\/span>);<\/span>\r\nconst<\/span> graphqlHTTP<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express-graphql<\/span>'<\/span>);<\/span>\r\nconst<\/span> {<\/span> buildSchema<\/span> }<\/span> =<\/span> require<\/span>(<\/span>'<\/span>graphql<\/span>'<\/span>);<\/span>\r\n\r\nconst<\/span> schema<\/span> =<\/span> buildSchema<\/span>(<\/span>`\r\n  type Query {\r\n    hello: String\r\n  }\r\n`<\/span>);<\/span>\r\n\r\nconst<\/span> root<\/span> =<\/span> {<\/span>\r\n  hello<\/span>:<\/span> ()<\/span> =><\/span> {<\/span>\r\n    return<\/span> '<\/span>Hello world!<\/span>'<\/span>;<\/span>\r\n  },<\/span>\r\n};<\/span>\r\n\r\nconst<\/span> app<\/span> =<\/span> express<\/span>();<\/span>\r\napp<\/span>.<\/span>use<\/span>(<\/span>'<\/span>\/graphql<\/span>'<\/span>,<\/span> graphqlHTTP<\/span>({<\/span>\r\n  schema<\/span>:<\/span> schema<\/span>,<\/span>\r\n  rootValue<\/span>:<\/span> root<\/span>,<\/span>\r\n  graphiql<\/span>:<\/span> true<\/span>,<\/span>\r\n}));<\/span>\r\napp<\/span>.<\/span>listen<\/span>(<\/span>4000<\/span>);<\/span>\r\nconsole<\/span>.<\/span>log<\/span>(<\/span>'<\/span>Running a GraphQL API server at http:\/\/localhost:4000\/graphql<\/span>'<\/span>);<\/span>\r\n<\/code><\/pre>\n
$<\/span> node server.js \r\nRunning a GraphQL API server at http:\/\/localhost:4000\/graphql\r\n<\/span><\/code><\/pre>\n
\u7531\u4e8e\u8bbe\u7f6e\u4e86 `graphiql: true`\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 GraphiQL\u3002<\/p>\n
\"Screen<\/div>\n
GraphQL\u5ba2\u6237\u7aef<\/h1>\n
    curl\u3067graphql\u3092\u5b9f\u884c\u3059\u308b<\/ul>\n
    $<\/span> curl -X<\/span> POST -H<\/span> \"Content-Type: application\/json\"<\/span> -d<\/span> '{\"query\": \"{ hello }\"}'<\/span> http:\/\/localhost:4000\/graphql\r\n{\"data\":{\"hello\":\"Hello world!\"}}\r\n<\/span><\/code><\/pre>\n
      \n
    • \n
        GUI\u3067\u5b9f\u884c\u3059\u308b\u5834\u5408\u306fGraphiQL\u3084Insomnia\u306a\u3069\u3092\u4f7f\u3046<\/ul>\n<\/li>\n<\/ul>\n
         <\/p>\n
          \u30d6\u30e9\u30a6\u30b6\u304b\u3089\u5b9f\u884c\u3059\u308b<\/ul>\n
          \u6253\u5f00 http:\/\/localhost:4000\/graphql \u7684\u5f00\u53d1\u5de5\u5177\uff0c\u5e76\u590d\u5236\u7c98\u8d34\u4ee5\u4e0b\u5185\u5bb9\u3002<\/p>\n
          fetch<\/span>(<\/span>'<\/span>\/graphql<\/span>'<\/span>,<\/span> {<\/span>\r\n  method<\/span>:<\/span> '<\/span>POST<\/span>'<\/span>,<\/span>\r\n  headers<\/span>:<\/span> {<\/span>\r\n    '<\/span>Content-Type<\/span>'<\/span>:<\/span> '<\/span>application\/json<\/span>'<\/span>,<\/span>\r\n    '<\/span>Accept<\/span>'<\/span>:<\/span> '<\/span>application\/json<\/span>'<\/span>,<\/span>\r\n  },<\/span>\r\n  body<\/span>:<\/span> JSON<\/span>.<\/span>stringify<\/span>({<\/span>query<\/span>:<\/span> \"<\/span>{ hello }<\/span>\"<\/span>})<\/span>\r\n})<\/span>\r\n  .<\/span>then<\/span>(<\/span>r<\/span> =><\/span> r<\/span>.<\/span>json<\/span>())<\/span>\r\n  .<\/span>then<\/span>(<\/span>data<\/span> =><\/span> console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>data returned:<\/span>'<\/span>,<\/span> data<\/span>));<\/span>\r\n<\/code><\/pre>\n
          \"Screen<\/div>\n
          \u57fa\u672c\u7c7b\u578b<\/h1>\n
          GraphQL\u7684Schema\u8bed\u8a00\u652f\u6301String\u3001Int\u3001Float\u3001Boolean\u548cID\u8fd9\u51e0\u79cd\u6807\u91cf\u7c7b\u578b\uff0c\u56e0\u6b64\u53ef\u4ee5\u76f4\u63a5\u5728\u4f20\u9012\u7ed9buildSchema\u7684Schema\u4e2d\u4f7f\u7528\u5b83\u4eec\u3002<\/p>\n
          \u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6240\u6709\u7c7b\u578b\u90fd\u5141\u8bb8\u4e3anull\u503c\u3002\u5c06\u4efb\u610f\u4e00\u4e2a\u6807\u91cf\u7c7b\u578b\u8fd4\u56de\u4e3anull\u662f\u5408\u6cd5\u7684\u3002\u901a\u8fc7\u4f7f\u7528\u611f\u53f9\u53f7\uff0c\u53ef\u4ee5\u8868\u793a\u8be5\u7c7b\u578b\u4e0d\u53ef\u4e3anull\uff0c\u4f8b\u5982String\uff01\u8868\u793a\u4e0d\u53ef\u4e3anull\u7684\u5b57\u7b26\u4e32\u3002<\/p><\/blockquote>\n
          const<\/span> express<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express<\/span>'<\/span>);<\/span>\r\nconst<\/span> graphqlHTTP<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express-graphql<\/span>'<\/span>);<\/span>\r\nconst<\/span> {<\/span> buildSchema<\/span> }<\/span> =<\/span> require<\/span>(<\/span>'<\/span>graphql<\/span>'<\/span>);<\/span>\r\n\r\nconst<\/span> schema<\/span> =<\/span> buildSchema<\/span>(<\/span>`\r\n  type Query {\r\n    quoteOfTheDay: String\r\n    random: Float!\r\n    rollThreeDice: [Int]\r\n  }\r\n`<\/span>);<\/span>\r\n\r\nconst<\/span> root<\/span> =<\/span> {<\/span>\r\n  quoteOfTheDay<\/span>:<\/span> ()<\/span> =><\/span> {<\/span>\r\n    return<\/span> Math<\/span>.<\/span>random<\/span>()<\/span> <<\/span> 0.5<\/span> ?<\/span> '<\/span>Take it easy<\/span>'<\/span> :<\/span> '<\/span>Salvation lies within<\/span>'<\/span>;<\/span>\r\n  },<\/span>\r\n  random<\/span>:<\/span> ()<\/span> =><\/span> {<\/span>\r\n    return<\/span> Math<\/span>.<\/span>random<\/span>();<\/span>\r\n  },<\/span>\r\n  rollThreeDice<\/span>:<\/span> ()<\/span> =><\/span> {<\/span>\r\n    return<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>].<\/span>map<\/span>(<\/span>_<\/span> =><\/span> 1<\/span> +<\/span> Math<\/span>.<\/span>floor<\/span>(<\/span>Math<\/span>.<\/span>random<\/span>()<\/span> *<\/span> 6<\/span>));<\/span>\r\n  },<\/span>\r\n};<\/span>\r\n\r\nconst<\/span> app<\/span> =<\/span> express<\/span>();<\/span>\r\napp<\/span>.<\/span>use<\/span>(<\/span>'<\/span>\/graphql<\/span>'<\/span>,<\/span> graphqlHTTP<\/span>({<\/span>\r\n  schema<\/span>:<\/span> schema<\/span>,<\/span>\r\n  rootValue<\/span>:<\/span> root<\/span>,<\/span>\r\n  graphiql<\/span>:<\/span> true<\/span>,<\/span>\r\n}));<\/span>\r\napp<\/span>.<\/span>listen<\/span>(<\/span>4000<\/span>);<\/span>\r\nconsole<\/span>.<\/span>log<\/span>(<\/span>'<\/span>Running a GraphQL API server at localhost:4000\/graphql<\/span>'<\/span>);<\/span>\r\n<\/code><\/pre>\n
          \u6211\u53ef\u4ee5\u786e\u8ba4\u5df2\u7ecf\u4ee5\u6307\u5b9a\u7684\u7c7b\u578b\u83b7\u53d6\u5230\u4e86\u6570\u636e\u3002<\/p>\n
          \"Screen<\/div>\n
          \u4f20\u9012\u53c2\u6570 d\u00ec sh\u016b)<\/h1>\n
          \u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3arollDice\u7684\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u63a5\u53d7numDice\u548cnumSides\u4f5c\u4e3a\u53c2\u6570\u3002<\/p>\n
          type Query {\r\n  rollDice(numDice: Int!, numSides: Int): [Int]\r\n}\r\n<\/code><\/pre>\n
          const<\/span> express<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express<\/span>'<\/span>);<\/span>\r\nconst<\/span> graphqlHTTP<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express-graphql<\/span>'<\/span>);<\/span>\r\nconst<\/span> {<\/span> buildSchema<\/span> }<\/span> =<\/span> require<\/span>(<\/span>'<\/span>graphql<\/span>'<\/span>);<\/span>\r\n\r\nconst<\/span> schema<\/span> =<\/span> buildSchema<\/span>(<\/span>`\r\n  type Query {\r\n    rollDice(numDice: Int!, numSides: Int): [Int]\r\n  }\r\n`<\/span>);<\/span>\r\n\r\nconst<\/span> root<\/span> =<\/span> {<\/span>\r\n  rollDice<\/span>:<\/span> ({<\/span>numDice<\/span>,<\/span> numSides<\/span>})<\/span> =><\/span> {<\/span>\r\n    const<\/span> output<\/span> =<\/span> [];<\/span>\r\n    for<\/span> (<\/span>let<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> numDice<\/span>;<\/span> i<\/span>++<\/span>)<\/span> {<\/span>\r\n      output<\/span>.<\/span>push<\/span>(<\/span>1<\/span> +<\/span> Math<\/span>.<\/span>floor<\/span>(<\/span>Math<\/span>.<\/span>random<\/span>()<\/span> *<\/span> (<\/span>numSides<\/span> ||<\/span> 6<\/span>)));<\/span>\r\n    }<\/span>\r\n    return<\/span> output<\/span>;<\/span>\r\n  }<\/span>\r\n};<\/span>\r\n\r\nconst<\/span> app<\/span> =<\/span> express<\/span>();<\/span>\r\napp<\/span>.<\/span>use<\/span>(<\/span>'<\/span>\/graphql<\/span>'<\/span>,<\/span> graphqlHTTP<\/span>({<\/span>\r\n  schema<\/span>:<\/span> schema<\/span>,<\/span>\r\n  rootValue<\/span>:<\/span> root<\/span>,<\/span>\r\n  graphiql<\/span>:<\/span> true<\/span>,<\/span>\r\n}));<\/span>\r\napp<\/span>.<\/span>listen<\/span>(<\/span>4000<\/span>);<\/span>\r\nconsole<\/span>.<\/span>log<\/span>(<\/span>'<\/span>Running a GraphQL API server at localhost:4000\/graphql<\/span>'<\/span>);<\/span>\r\n<\/code><\/pre>\n
          \u786e\u8ba4\u5e26\u53c2\u6570\u7684\u5ef6\u8fdf<\/p>\n
          \"Screen<\/div>\n
          \u5728\u8bbe\u7f6e\u53c2\u6570\u65f6\uff0c\u6700\u597d\u4f7f\u7528$\u8bed\u6cd5\u3002<\/p>\n
          const<\/span> dice<\/span> =<\/span> 3<\/span>;<\/span>\r\nconst<\/span> sides<\/span> =<\/span> 6<\/span>;<\/span>\r\nconst<\/span> query<\/span> =<\/span> `query RollDice($dice: Int!, $sides: Int) {\r\n  rollDice(numDice: $dice, numSides: $sides)\r\n}`<\/span>;<\/span>\r\n\r\nfetch<\/span>(<\/span>'<\/span>\/graphql<\/span>'<\/span>,<\/span> {<\/span>\r\n  method<\/span>:<\/span> '<\/span>POST<\/span>'<\/span>,<\/span>\r\n  headers<\/span>:<\/span> {<\/span>\r\n    '<\/span>Content-Type<\/span>'<\/span>:<\/span> '<\/span>application\/json<\/span>'<\/span>,<\/span>\r\n    '<\/span>Accept<\/span>'<\/span>:<\/span> '<\/span>application\/json<\/span>'<\/span>,<\/span>\r\n  },<\/span>\r\n  body<\/span>:<\/span> JSON<\/span>.<\/span>stringify<\/span>({<\/span>\r\n    query<\/span>,<\/span>\r\n    variables<\/span>:<\/span> {<\/span> dice<\/span>,<\/span> sides<\/span> },<\/span>\r\n  })<\/span>\r\n})<\/span>\r\n  .<\/span>then<\/span>(<\/span>r<\/span> =><\/span> r<\/span>.<\/span>json<\/span>())<\/span>\r\n  .<\/span>then<\/span>(<\/span>data<\/span> =><\/span> console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>data returned:<\/span>'<\/span>,<\/span> data<\/span>));<\/span>\r\n<\/code><\/pre>\n
          \"Screen<\/div>\n
          \u7269\u4f53\u7c7b\u578b<\/h1>\n
          \u8bf7\u6307\u5b9a\u5bf9\u8c61\u7c7b\u578b\u5e76\u8fd4\u56de\u503c\u3002<\/p>\n
          const<\/span> express<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express<\/span>'<\/span>);<\/span>\r\nconst<\/span> graphqlHTTP<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express-graphql<\/span>'<\/span>);<\/span>\r\nconst<\/span> {<\/span> buildSchema<\/span> }<\/span> =<\/span> require<\/span>(<\/span>'<\/span>graphql<\/span>'<\/span>);<\/span>\r\n\r\nconst<\/span> schema<\/span> =<\/span> buildSchema<\/span>(<\/span>`\r\n  type RandomDie {\r\n    numSides: Int!\r\n    rollOnce: Int!\r\n    roll(numRolls: Int!): [Int]\r\n  }\r\n\r\n  type Query {\r\n    getDie(numSides: Int): RandomDie\r\n  }\r\n`<\/span>);<\/span>\r\n\r\nclass<\/span> RandomDie<\/span> {<\/span>\r\n  constructor<\/span>(<\/span>numSides<\/span>)<\/span> {<\/span>\r\n    this<\/span>.<\/span>numSides<\/span> =<\/span> numSides<\/span>;<\/span>\r\n  }<\/span>\r\n\r\n  rollOnce<\/span>()<\/span> {<\/span>\r\n    return<\/span> 1<\/span> +<\/span> Math<\/span>.<\/span>floor<\/span>(<\/span>Math<\/span>.<\/span>random<\/span>()<\/span> *<\/span> this<\/span>.<\/span>numSides<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  roll<\/span>({<\/span>numRolls<\/span>})<\/span> {<\/span>\r\n    const<\/span> output<\/span> =<\/span> [];<\/span>\r\n    for<\/span> (<\/span>let<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> numRolls<\/span>;<\/span> i<\/span>++<\/span>)<\/span> {<\/span>\r\n      output<\/span>.<\/span>push<\/span>(<\/span>this<\/span>.<\/span>rollOnce<\/span>());<\/span>\r\n    }<\/span>\r\n    return<\/span> output<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\nconst<\/span> root<\/span> =<\/span> {<\/span>\r\n  getDie<\/span>:<\/span> ({<\/span>numSides<\/span>})<\/span> =><\/span> {<\/span>\r\n    return<\/span> new<\/span> RandomDie<\/span>(<\/span>numSides<\/span> ||<\/span> 6<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\nconst<\/span> app<\/span> =<\/span> express<\/span>();<\/span>\r\napp<\/span>.<\/span>use<\/span>(<\/span>'<\/span>\/graphql<\/span>'<\/span>,<\/span> graphqlHTTP<\/span>({<\/span>\r\n  schema<\/span>:<\/span> schema<\/span>,<\/span>\r\n  rootValue<\/span>:<\/span> root<\/span>,<\/span>\r\n  graphiql<\/span>:<\/span> true<\/span>,<\/span>\r\n}));<\/span>\r\napp<\/span>.<\/span>listen<\/span>(<\/span>4000<\/span>);<\/span>\r\nconsole<\/span>.<\/span>log<\/span>(<\/span>'<\/span>Running a GraphQL API server at localhost:4000\/graphql<\/span>'<\/span>);<\/span>\r\n<\/code><\/pre>\n
          {\r\n  getDie(numSides: 6) {\r\n    numSides\r\n    rollOnce\r\n    roll(numRolls: 3)\r\n  }\r\n}\r\n<\/code><\/pre>\n
          \"Screen<\/div>\n
          \u7a81\u53d8\u548c\u8f93\u5165\u7c7b\u578b<\/h1>\n
          \u521b\u5efa\u6216\u66f4\u65b0\u6570\u636e\u53ef\u4ee5\u4f7f\u7528mutatison\u800c\u4e0d\u662fquery\u8fdb\u884c\u53d1\u9001\u3002
          \n\u4e3a\u4e86\u7b80\u5316\u6a21\u5f0f\uff0c\u5efa\u8bae\u4f7f\u7528input\u5173\u952e\u5b57\u800c\u4e0d\u662ftype\u5173\u952e\u5b57\u3002<\/p>\n
          const<\/span> express<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express<\/span>'<\/span>);<\/span>\r\nconst<\/span> graphqlHTTP<\/span> =<\/span> require<\/span>(<\/span>'<\/span>express-graphql<\/span>'<\/span>);<\/span>\r\nconst<\/span> {<\/span> buildSchema<\/span> }<\/span> =<\/span> require<\/span>(<\/span>'<\/span>graphql<\/span>'<\/span>);<\/span>\r\n\r\nconst<\/span> schema<\/span> =<\/span> buildSchema<\/span>(<\/span>`\r\n  input MessageInput {\r\n    content: String\r\n    author: String\r\n  }\r\n\r\n  type Message {\r\n    id: ID!\r\n    content: String\r\n    author: String\r\n  }\r\n\r\n  type Query {\r\n    getMessage(id: ID!): Message\r\n  }\r\n\r\n  type Mutation {\r\n    createMessage(input: MessageInput): Message\r\n    updateMessage(id: ID!, input: MessageInput): Message\r\n  }\r\n`<\/span>);<\/span>\r\n\r\nclass<\/span> Message<\/span> {<\/span>\r\n  constructor<\/span>(<\/span>id<\/span>,<\/span> {<\/span>content<\/span>,<\/span> author<\/span>})<\/span> {<\/span>\r\n    this<\/span>.<\/span>id<\/span> =<\/span> id<\/span>;<\/span>\r\n    this<\/span>.<\/span>content<\/span> =<\/span> content<\/span>;<\/span>\r\n    this<\/span>.<\/span>author<\/span> =<\/span> author<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\nconst<\/span> fakeDatabase<\/span> =<\/span> {};<\/span>\r\n\r\nconst<\/span> root<\/span> =<\/span> {<\/span>\r\n  getMessage<\/span>:<\/span> ({<\/span>id<\/span>})<\/span> =><\/span> {<\/span>\r\n    if<\/span> (<\/span>!<\/span>fakeDatabase<\/span>[<\/span>id<\/span>])<\/span> {<\/span>\r\n      throw<\/span> new<\/span> Error<\/span>(<\/span>'<\/span>no message exists with id <\/span>'<\/span> +<\/span> id<\/span>);<\/span>\r\n    }<\/span>\r\n    return<\/span> new<\/span> Message<\/span>(<\/span>id<\/span>,<\/span> fakeDatabase<\/span>[<\/span>id<\/span>]);<\/span>\r\n  },<\/span>\r\n  createMessage<\/span>:<\/span> ({<\/span>input<\/span>})<\/span> =><\/span> {<\/span>\r\n    const<\/span> id<\/span> =<\/span> require<\/span>(<\/span>'<\/span>crypto<\/span>'<\/span>).<\/span>randomBytes<\/span>(<\/span>10<\/span>).<\/span>toString<\/span>(<\/span>'<\/span>hex<\/span>'<\/span>);<\/span>\r\n\r\n    fakeDatabase<\/span>[<\/span>id<\/span>]<\/span> =<\/span> input<\/span>;<\/span>\r\n    return<\/span> new<\/span> Message<\/span>(<\/span>id<\/span>,<\/span> input<\/span>);<\/span>\r\n  },<\/span>\r\n  updateMessage<\/span>:<\/span> ({<\/span>id<\/span>,<\/span> input<\/span>})<\/span> =><\/span> {<\/span>\r\n    if<\/span> (<\/span>!<\/span>fakeDatabase<\/span>[<\/span>id<\/span>])<\/span> {<\/span>\r\n      throw<\/span> new<\/span> Error<\/span>(<\/span>'<\/span>no message exists with id <\/span>'<\/span> +<\/span> id<\/span>);<\/span>\r\n    }<\/span>\r\n    fakeDatabase<\/span>[<\/span>id<\/span>]<\/span> =<\/span> input<\/span>;<\/span>\r\n    return<\/span> new<\/span> Message<\/span>(<\/span>id<\/span>,<\/span> input<\/span>);<\/span>\r\n  },<\/span>\r\n};<\/span>\r\n\r\nconst<\/span> app<\/span> =<\/span> express<\/span>();<\/span>\r\napp<\/span>.<\/span>use<\/span>(<\/span>'<\/span>\/graphql<\/span>'<\/span>,<\/span> graphqlHTTP<\/span>({<\/span>\r\n  schema<\/span>:<\/span> schema<\/span>,<\/span>\r\n  rootValue<\/span>:<\/span> root<\/span>,<\/span>\r\n  graphiql<\/span>:<\/span> true<\/span>,<\/span>\r\n}));<\/span>\r\napp<\/span>.<\/span>listen<\/span>(<\/span>4000<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n  console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>Running a GraphQL API server at localhost:4000\/graphql<\/span>'<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
          \u786e\u8ba4\u6570\u636e\u521b\u5efa<\/p>\n
          \"Screen<\/div>\n
          \u786e\u8ba4\u6570\u636e\u66f4\u65b0<\/p>\n
          \"Screen<\/div>\n","protected":false},"excerpt":{"rendered":"
          \u6211\u662f\u4e00\u4e2a\u521d\u5b66\u8005\u3002\u6211\u53ea\u662f\u6309\u7167\u8fd9\u4e2a\u6559\u7a0b\u81ea\u5df1\u5c1d\u8bd5\uff0c\u5e76\u5c06\u7ed3\u679c\u4ee5\u5907\u5fd8\u5f55\u7684\u5f62\u5f0f\u5199\u4e0b\u6765\u3002\u8bf7\u591a\u5173\u7167\u3002 \u5f00\u59cb\u4f7f\u7528GraphQL. […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47513","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b - 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\/\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bgraphql-js\u7684\u6559\u7a0b\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b\" \/>\n<meta property=\"og:description\" content=\"\u6211\u662f\u4e00\u4e2a\u521d\u5b66\u8005\u3002\u6211\u53ea\u662f\u6309\u7167\u8fd9\u4e2a\u6559\u7a0b\u81ea\u5df1\u5c1d\u8bd5\uff0c\u5e76\u5c06\u7ed3\u679c\u4ee5\u5907\u5fd8\u5f55\u7684\u5f62\u5f0f\u5199\u4e0b\u6765\u3002\u8bf7\u591a\u5173\u7167\u3002 \u5f00\u59cb\u4f7f\u7528GraphQL. […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bgraphql-js\u7684\u6559\u7a0b\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-23T02:18:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T07:15:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d7f82913a08637a6a6abc\/18-0.png\" \/>\n<meta name=\"author\" content=\"\u96c5, \u609f\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u96c5, \u609f\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/\",\"name\":\"\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-02-23T02:18:55+00:00\",\"dateModified\":\"2024-05-04T07:15:57+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6\",\"name\":\"\u96c5, \u609f\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g\",\"caption\":\"\u96c5, \u609f\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/yawu\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bgraphql-js\u7684\u6559\u7a0b\u3002\/","og_locale":"zh_CN","og_type":"article","og_title":"\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b","og_description":"\u6211\u662f\u4e00\u4e2a\u521d\u5b66\u8005\u3002\u6211\u53ea\u662f\u6309\u7167\u8fd9\u4e2a\u6559\u7a0b\u81ea\u5df1\u5c1d\u8bd5\uff0c\u5e76\u5c06\u7ed3\u679c\u4ee5\u5907\u5fd8\u5f55\u7684\u5f62\u5f0f\u5199\u4e0b\u6765\u3002\u8bf7\u591a\u5173\u7167\u3002 \u5f00\u59cb\u4f7f\u7528GraphQL. […]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bgraphql-js\u7684\u6559\u7a0b\u3002\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-02-23T02:18:55+00:00","article_modified_time":"2024-05-04T07:15:57+00:00","og_image":[{"url":"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d7f82913a08637a6a6abc\/18-0.png"}],"author":"\u96c5, \u609f","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u96c5, \u609f","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"3 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/","name":"\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-02-23T02:18:55+00:00","dateModified":"2024-05-04T07:15:57+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6"},"breadcrumb":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/zh\/blog\/"},{"@type":"ListItem","position":2,"name":"\u6211\u53ea\u662f\u8bd5\u7740\u505a\u4e86\u4e00\u4e0bGraphQL.js\u7684\u6559\u7a0b"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6","name":"\u96c5, \u609f","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/e71a913e914f1aad1efc391f92084294bac54bc782acd289638580134cf667a6?s=96&d=mm&r=g","caption":"\u96c5, \u609f"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/yawu\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%8f%aa%e6%98%af%e8%af%95%e7%9d%80%e5%81%9a%e4%ba%86%e4%b8%80%e4%b8%8bgraphql-js%e7%9a%84%e6%95%99%e7%a8%8b%e3%80%82\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/47513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=47513"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/47513\/revisions"}],"predecessor-version":[{"id":99086,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/47513\/revisions\/99086"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=47513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=47513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=47513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}