{"id":48122,"date":"2023-12-12T15:24:48","date_gmt":"2024-02-23T16:00:26","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8scala%e7%9a%84sangria%e5%ba%93%e6%9d%a5%e5%ae%9e%e7%8e%b0graphql-api%e3%80%82\/"},"modified":"2024-05-04T13:15:04","modified_gmt":"2024-05-04T05:15:04","slug":"%e4%bd%bf%e7%94%a8scala%e7%9a%84sangria%e5%ba%93%e6%9d%a5%e5%ae%9e%e7%8e%b0graphql-api%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8scala%e7%9a%84sangria%e5%ba%93%e6%9d%a5%e5%ae%9e%e7%8e%b0graphql-api%e3%80%82\/","title":{"rendered":"\u4f7f\u7528Scala\u7684Sangria\u5e93\u6765\u5b9e\u73b0GraphQL API"},"content":{"rendered":"

\u8fd9\u7bc7\u6587\u7ae0\u662f\u5173\u4e8e\u4ec0\u4e48\u7684\uff1f<\/h2>\n

\u5f15\u5165\u4e86sangria\/sangria\u6765\u5b9e\u73b0\u5728Scala\u4e2d\u521b\u5efaGraphQL\u670d\u52a1\u5668\u3002<\/p>\n

\u9605\u8bfb\u5b98\u65b9\u6587\u6863\u548c\u5b66\u4e60Sangria\u662f\u6700\u5feb\u7684\u65b9\u6cd5\u3002\u6b64\u5916\uff0c\u7531\u4e8e\u5b98\u65b9\u8fd8\u63d0\u4f9b\u4e86\u793a\u4f8b\uff0c\u6240\u4ee5\u53c2\u8003\u793a\u4f8b\u4f1a\u66f4\u597d\u3002<\/p>\n

\u4e0d\u8fc7\uff0c\u4e3a\u4e86\u65b9\u4fbf\u7b80\u5355\u67e5\u9605\uff0c\u6211\u4f1a\u9644\u4e0a\u7b80\u77ed\u7684\u6837\u672c\u6e05\u5355\u3002<\/p>\n

\u7528\u6cd5\u793a\u4f8b<\/h2>\n

\u76f4\u5230\u80fd\u591f\u53d1\u51fa\u67e5\u8be2\/\u53d8\u5f02\u3002<\/h3>\n

\u76f4\u5230\u80fd\u591f\u5411\u67d0\u4e2a\u72ec\u7279\u7684\u5bf9\u8c61\u53d1\u9001\u67e5\u8be2\u548c\u53d8\u66f4\u8bf7\u6c42\u4e3a\u6b62\u3002
\n\u6e90\u4ee3\u7801\u5df2\u653e\u7f6e\u5728Github\u4e0a\u3002<\/p>\n

\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u60f3\u8981\u5728GraphQL\u4e2d\u4ea4\u4e92\u7684\u7c7b\u3002<\/p>\n

  case<\/span> class<\/span> MyObject<\/span>(<\/span>id<\/span>:<\/span> Long<\/span>,<\/span> name<\/span>:<\/span> String<\/span>)<\/span>\r\n  class<\/span> MyObjectRepository<\/span>()<\/span> {<\/span>  \/\/ DB\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u3059\u308b\u3084\u3064<\/span>\r\n    def<\/span> findAll<\/span>:<\/span> Seq<\/span>[<\/span>MyObject<\/span>]<\/span> =<\/span> ???<\/span>\r\n    def<\/span> findById<\/span>(<\/span>id<\/span>:<\/span> Long<\/span>)<\/span>:<\/span> Option<\/span>[<\/span>MyObject<\/span>]<\/span> =<\/span> ???<\/span>\r\n    def<\/span> store<\/span>(<\/span>obj<\/span>:<\/span> MyObject<\/span>)<\/span>:<\/span> MyObject<\/span> =<\/span> ???<\/span>\r\n    def<\/span> create<\/span>(<\/span>name<\/span>:<\/span> String<\/span>)<\/span>:<\/span> MyObject<\/span> =<\/span> ???<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
\u6211\u4eec\u5c06\u5b9a\u4e49\u4e00\u4e2a\u4e0e\u8fd9\u4e2aMyObject\u76f8\u5bf9\u5e94\u7684GraphQL\u6a21\u5f0f\u3002
\n\u5982\u679c\u53ea\u662f\u7b80\u5355\u5730\u5c06case class\u8f6c\u6362\uff0c\u53ef\u4ee5\u4f7f\u7528`sangria.macros.derive.deriveObjectType`\u6765\u81ea\u52a8\u5b9e\u73b0\u3002<\/p>\n
  \/\/ MyObject\u3092GraphQL\u7684\u306b\u8868\u73fe\u3059\u308b<\/span>\r\n  \/\/ macro\u3092\u4f7f\u3063\u3066\u697d\u306b\u5c0e\u51fa\u3059\u308b<\/span>\r\n  val<\/span> myObj<\/span> =<\/span> sangria<\/span>.<\/span>macros<\/span>.<\/span>derive<\/span>.<\/span>deriveObjectType<\/span>[<\/span>Unit<\/span>, MyObject<\/span>]()<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u5b9e\u73b0\u4e00\u4e2a\u67e5\u8be2\uff0c\u4f7f\u7528all\u65b9\u6cd5\u67e5\u8be2MyObjectRepository\u4e2d\u7684\u6240\u6709\u5bf9\u8c61\uff0c\u5e76\u4f7f\u7528find_by_id(id)\u65b9\u6cd5\u67e5\u8be2MyObjectRepository\u4e2d\u6307\u5b9aid\u7684\u5bf9\u8c61\u3002<\/p>\n
  \/\/ MyObject\u306b\u5bfe\u3059\u308bQuery<\/span>\r\n  lazy<\/span> val<\/span> myQuery<\/span>:<\/span> ObjectType<\/span>[<\/span>MyObjectRepository<\/span>, Unit<\/span>]<\/span> =<\/span> {<\/span>\r\n    ObjectType<\/span>.<\/span>apply<\/span>(<\/span>\r\n      \"MyQuery\"<\/span>,<\/span>\r\n      fields<\/span>[<\/span>MyObjectRepository<\/span>, Unit<\/span>](<\/span>\r\n        Field<\/span>(<\/span>\"all\"<\/span>,<\/span> ListType<\/span>(<\/span>myObj<\/span>),<\/span> resolve<\/span> =<\/span> c<\/span> =><\/span> c<\/span>.<\/span>ctx<\/span>.<\/span>findAll<\/span>),<\/span> \/\/ all\u3067\u5168\u90e8\u8fd4\u3059<\/span>\r\n        {<\/span>\r\n          val<\/span> idArg<\/span> =<\/span> Argument<\/span>(<\/span>\"id\"<\/span>,<\/span> LongType<\/span>)<\/span>\r\n          Field<\/span>(<\/span>\"find_by_id\"<\/span>,<\/span> OptionType<\/span>(<\/span>myObj<\/span>),<\/span> arguments<\/span> =<\/span> idArg<\/span> ::<\/span> Nil<\/span>,<\/span> \r\n            resolve<\/span> =<\/span> c<\/span> =><\/span> c<\/span>.<\/span>ctx<\/span>.<\/span>findById<\/span>(<\/span>ctx<\/span> arg<\/span> idArg<\/span>))<\/span> \/\/ find_by_id(id)\u3067id\u6307\u5b9a\u3057\u3066\u53d6\u5f97\u3059\u308b<\/span>\r\n        }<\/span>\r\n      )<\/span>\r\n    )<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
\u4e3a\u4e86\u6267\u884c\u67e5\u8be2\uff0c\u9700\u8981MyObjectRepository\uff0c\u56e0\u6b64ObjectType\u7684Ctx\u7c7b\u578b\u53c2\u6570\u9700\u8981\u63d0\u4f9bMyObjectRepository\u3002
\nField\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u8868\u793a\u8fd4\u56de\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5728arguments\u53c2\u6570\u4e2d\uff0c\u4f20\u5165\u7528\u4e8e\u6267\u884c\u6b64\u67e5\u8be2\u7684\u8f93\u5165\uff0c\u901a\u8fc7resolve\u53c2\u6570\u63d0\u4f9b\u4f7f\u7528\u5b9e\u9645\u7684MyObjectRepository\u6765\u8bbf\u95ee\u6570\u636e\u7684\u51fd\u6570\u3002<\/p>\n
\u65e2\u7ecf\u5b9e\u73b0\u4e86\u67e5\u8be2\u529f\u80fd\uff0c\u63a5\u4e0b\u6765\u662f\u7a81\u53d8\u3002\u5c1d\u8bd5\u5b9e\u73b0\u4e00\u4e2a\u5b58\u50a8\u83b7\u53d6MyObject\u4fe1\u606f\u5e76\u4fdd\u5b58\u7684\u51fd\u6570store\uff0c\u5e76\u53ea\u63a5\u6536\u540d\u79f0name\uff0c\u5176\u4f59\u5c5e\u6027\u7531\u51fd\u6570create\u751f\u6210\u3002<\/p>\n
\u56e0\u4e3a\u9700\u8981\u80fd\u591f\u63a5\u6536MyObject\u4f5c\u4e3a\u8f93\u5165\u6765\u4e3astore\u505a\u51c6\u5907\uff0c\u6240\u4ee5\u53ef\u4ee5\u4ece\u8fd9\u4e00\u70b9\u5f00\u59cb\u3002<\/p>\n
  \/\/ MyObject\u3092input\u3068\u3057\u3066\u53d7\u3051\u53d6\u308c\u308b\u3088\u3046\u306b\u3059\u308b<\/span>\r\n  \/\/ \u3053\u3053\u306f\u3082\u3046\u5c11\u3057\u3044\u3044\u3084\u308a\u65b9\u304c\u3042\u308b\u304b\u3082\u77e5\u308c\u306a\u3044...<\/span>\r\n  val<\/span> myObjectInputType<\/span>:<\/span> InputObjectType<\/span>[<\/span>MyObject<\/span>]<\/span> =<\/span>\r\n  InputObjectType<\/span>[<\/span>MyObject<\/span>](<\/span>\"MyObjectInput\"<\/span>,<\/span>\r\n                            List<\/span>(<\/span>\r\n                              InputField<\/span>(<\/span>\"id\"<\/span>,<\/span> LongType<\/span>),<\/span>\r\n                              InputField<\/span>(<\/span>\"name\"<\/span>,<\/span> StringType<\/span>)<\/span>\r\n                            ))<\/span>\r\n\r\nimplicit<\/span> val<\/span> myObjectInput<\/span>:<\/span> FromInput<\/span>[<\/span>MyObject<\/span>]<\/span> =<\/span> new<\/span> FromInput<\/span>[<\/span>MyObject<\/span>]<\/span> {<\/span>\r\n  override<\/span> val<\/span> marshaller<\/span>:<\/span> ResultMarshaller<\/span> =<\/span> CoercedScalaResultMarshaller<\/span>.<\/span>default<\/span>\r\n\r\n  override<\/span> def<\/span> fromResult<\/span>(<\/span>node<\/span>:<\/span> marshaller.Node<\/span>)<\/span>:<\/span> MyObject<\/span> =<\/span> {<\/span>\r\n    val<\/span> m<\/span> =<\/span> node<\/span>.<\/span>asInstanceOf<\/span>[<\/span>Map<\/span>[<\/span>String<\/span>, Any<\/span>]]<\/span>\r\n    MyObject<\/span>(<\/span>m<\/span>(<\/span>\"id\"<\/span>).<\/span>asInstanceOf<\/span>[<\/span>Long<\/span>],<\/span> m<\/span>(<\/span>\"name\"<\/span>).<\/span>asInstanceOf<\/span>[<\/span>String<\/span>])<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7531\u4e8e\u80fd\u591f\u63a5\u6536MyObject\uff0c\u56e0\u6b64\u8981\u5b9e\u73b0Mutation\u3002
\n\u50cfQuery\u4e00\u6837\uff0c\u5c06MyObjectRepository\u4f5c\u4e3aObjectType\u7684Ctx\u7c7b\u578b\u53c2\u6570\u4f20\u9012\uff0c\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u53ef\u4ee5\u5728Field.resolve\u4e2d\u4f7f\u7528\u3002<\/p>\n
\/\/ mutation<\/span>\r\nlazy<\/span> val<\/span> myMutation<\/span>:<\/span> ObjectType<\/span>[<\/span>MyObjectRepository<\/span>, Unit<\/span>]<\/span> =<\/span> {<\/span>\r\n  ObjectType<\/span>.<\/span>apply<\/span>(<\/span>\r\n    \"MyMutation\"<\/span>,<\/span>\r\n    fields<\/span>[<\/span>MyObjectRepository<\/span>, Unit<\/span>](<\/span>\r\n      {<\/span>\r\n        \/\/ my_object\u306bJSON\u3067MyObject\u306e\u30c7\u30fc\u30bf\u3092\u3082\u3089\u3063\u3066\u8ffd\u52a0\u4fdd\u5b58\u3059\u308b<\/span>\r\n        val<\/span> inputMyObject<\/span> =<\/span> Argument<\/span>(<\/span>\"my_object\"<\/span>,<\/span> myObjectInputType<\/span>)<\/span>\r\n        Field<\/span>(<\/span>\r\n          \"store\"<\/span>,<\/span>\r\n          arguments<\/span> =<\/span> inputMyObject<\/span> ::<\/span> Nil<\/span>,<\/span>\r\n          fieldType<\/span> =<\/span> myObjectType<\/span>,<\/span>\r\n          resolve<\/span> =<\/span> c<\/span> =><\/span> c<\/span>.<\/span>ctx<\/span>.<\/span>store<\/span>(<\/span>c<\/span> arg<\/span> inputMyObject<\/span>)<\/span>\r\n        )<\/span>\r\n      },<\/span> {<\/span>\r\n        \/\/ name\u3060\u3051\u8cb0\u3063\u3066\u65b0\u898f\u4f5c\u6210\u3059\u308b<\/span>\r\n        val<\/span> inputName<\/span> =<\/span> Argument<\/span>(<\/span>\"name\"<\/span>,<\/span> StringType<\/span>)<\/span>\r\n        Field<\/span>(<\/span>\r\n          \"create\"<\/span>,<\/span>\r\n          arguments<\/span> =<\/span> inputName<\/span> ::<\/span> Nil<\/span>,<\/span>\r\n          fieldType<\/span> =<\/span> myObjectType<\/span>,<\/span>\r\n          resolve<\/span> =<\/span> c<\/span> =><\/span> c<\/span>.<\/span>ctx<\/span>.<\/span>create<\/span>(<\/span>c<\/span> arg<\/span> inputName<\/span>)<\/span>\r\n        )<\/span>\r\n      }<\/span>\r\n    )<\/span>\r\n  )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8981\u5c06\u5df2\u7ecf\u5b9e\u73b0\u7684\u67e5\u8be2(Query)\u548c\u53d8\u66f4(Mutation)\u4f5c\u4e3aGraphQL\u8bf7\u6c42\u63a5\u53d7\uff0c\u9700\u8981\u4f7f\u7528Schema\u3002<\/p>\n
  \/\/ myQuery\u3068myMutation\u3092GraphQL\u306eSchema\u3068\u3059\u308b<\/span>\r\n  lazy<\/span> val<\/span> schema<\/span>:<\/span> Schema<\/span>[<\/span>MyObjectRepository<\/span>, Unit<\/span>]<\/span> =<\/span> Schema<\/span>(<\/span>myQuery<\/span>,<\/span> Some<\/span>(<\/span>myMutation<\/span>))<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u73b0\u5728\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9MyObject\u6267\u884c\u67e5\u8be2\u548c\u53d8\u66f4\u64cd\u4f5c\u4e86\u3002<\/p>\n
\u4f7f\u7528Akka-HTTP\u516c\u5f00GraphQL API\u3002<\/h3>\n
\u4f7f\u7528Akka-HTTP\u548cspray-json\u6267\u884cGraphQL\u7684\u793a\u4f8b\u5c06\u5982\u4e0b\u6240\u793a\u3002
\n\u5c06graphiql.html\u653e\u7f6e\u5728src\/main\/resources\u4e0b\u3002<\/p>\n
\/\/ POST: \/graphql\u3067\u53d7\u3051\u4ed8\u3051\u308b<\/span>\r\nval<\/span> route<\/span>:<\/span> Route<\/span> =<\/span> (<\/span>post<\/span> &<\/span> path<\/span>(<\/span>\"graphql\"<\/span>))<\/span> {<\/span>\r\n  entity<\/span>(<\/span>as<\/span>[<\/span>JsValue<\/span>])<\/span> {<\/span> jsObject<\/span> =><\/span>\r\n    complete<\/span>(<\/span>this<\/span>.<\/span>execute<\/span>(<\/span>jsObject<\/span>)(<\/span>executionContext<\/span>))<\/span>\r\n  }<\/span> ~<\/span>\r\n  get<\/span> {<\/span>\r\n    getFromResource<\/span>(<\/span>\"graphiql.html\"<\/span>)<\/span>\r\n  }<\/span>\r\n}<\/span>\r\nval<\/span> repository<\/span> =<\/span> new<\/span> SchemaSample<\/span>.<\/span>MyObjectRepository<\/span>\r\n\r\n\/\/ Query or Mutation\u3092\u53d7\u3051\u53d6\u3063\u3066SchemaSample.schema\u3067\u5b9f\u884c\u3059\u308b<\/span>\r\ndef<\/span> execute<\/span>(<\/span>jsValue<\/span>:<\/span> spray.json.JsValue<\/span>)(<\/span>implicit<\/span> ec<\/span>:<\/span> ExecutionContext<\/span>)<\/span>:<\/span> Future<\/span>[(<\/span>StatusCode<\/span>, JsValue<\/span>)]<\/span> =<\/span> {<\/span>\r\n  val<\/span> JsObject<\/span>(<\/span>fields<\/span>)<\/span> =<\/span> jsValue<\/span>\r\n  val<\/span> operation<\/span> =<\/span> fields<\/span>.<\/span>get<\/span>(<\/span>\"operationName\"<\/span>)<\/span> collect<\/span> {<\/span>\r\n    case<\/span> JsString<\/span>(<\/span>op<\/span>)<\/span> =><\/span> op<\/span>\r\n  }<\/span>\r\n\r\n  val<\/span> vars<\/span> =<\/span> fields<\/span>.<\/span>get<\/span>(<\/span>\"variables\"<\/span>)<\/span> match<\/span> {<\/span>\r\n    case<\/span> Some<\/span>(<\/span>obj<\/span>:<\/span> JsObject<\/span>)<\/span> =><\/span> obj<\/span>\r\n    case<\/span> _<\/span>                   =><\/span> JsObject<\/span>.<\/span>empty<\/span>\r\n  }<\/span>\r\n\r\n  \/\/ query\u304bmutation\u306e\u3069\u3061\u3089\u304b<\/span>\r\n  val<\/span> Some<\/span>(<\/span>JsString<\/span>(<\/span>document<\/span>))<\/span> =<\/span> fields<\/span>.<\/span>get<\/span>(<\/span>\"query\"<\/span>)<\/span> orElse<\/span> fields<\/span>.<\/span>get<\/span>(<\/span>\"mutation\"<\/span>)<\/span>\r\n\r\n  Future<\/span>.<\/span>fromTry<\/span>(<\/span>QueryParser<\/span>.<\/span>parse<\/span>(<\/span>document<\/span>))<\/span> flatMap<\/span> {<\/span> queryDocument<\/span> =><\/span>\r\n    import<\/span> StatusCodes._<\/span>\r\n    \/\/ \u5b9f\u88c5\u3057\u305fSchema\u3068DB\u30a2\u30af\u30bb\u30b9\u306e\u305f\u3081\u306eRepository\u3092\u6e21\u3057\u3066\u5b9f\u884c\u3059\u308b<\/span>\r\n    Executor<\/span>\r\n      .<\/span>execute<\/span>(<\/span>\r\n        SchemaSample<\/span>.<\/span>schema<\/span>,<\/span> queryDocument<\/span>,<\/span> repository<\/span>\r\n        operationName<\/span> =<\/span> operation<\/span>,<\/span> variables<\/span> =<\/span> vars<\/span>\r\n      )<\/span>\r\n      .<\/span>map<\/span> {<\/span> jsValue<\/span> =><\/span> OK<\/span> -><\/span> jsValue<\/span> }<\/span>\r\n      .<\/span>recover<\/span> {<\/span>\r\n        case<\/span> error<\/span>:<\/span> QueryAnalysisError<\/span> =><\/span> BadRequest<\/span> -><\/span> error<\/span>.<\/span>resolveError<\/span> \/\/ \u30ea\u30af\u30a8\u30b9\u30c8\u304c\u4e0d\u6b63\u306a\u5834\u5408<\/span>\r\n        case<\/span> error<\/span>:<\/span> ErrorWithResolver<\/span>  =><\/span> InternalServerError<\/span> -><\/span> error<\/span>.<\/span>resolveError<\/span> \/\/ \u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3067\u304d\u306a\u304b\u3063\u305f\u5834\u5408<\/span>\r\n      }<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c1d\u8bd5\u542f\u52a8\u5e76\u6267\u884c\u8fd9\u4e2a\uff0c\u7136\u540e\u5c1d\u8bd5\u53d1\u9001Query\/Mutation\u3002<\/p>\n
\u5b9e\u65bd\u7ed3\u679c\u6837\u672c<\/h3>\n
\u8981\u5c1d\u8bd5\u53d1\u9001\u67e5\u8be2\uff0c\u8bf7\u53d1\u9001\u4ee5\u4e0b\u8bf7\u6c42\u3002<\/p>\n
query MyQuery {\r\n  all {\r\n    ...MyObj\r\n  }\r\n  find_by_id(id: 2) {\r\n    ...MyObj\r\n  }\r\n}\r\n\r\nfragment MyObj on MyObject {\r\n  id\r\n  name\r\n}\r\n<\/code><\/pre>\n
\u8fd9\u6837\u7684\u7247\u6bb5\u5df2\u7ecf\u51c6\u5907\u597d\u4e86\uff0cGraphQL\u5f88\u597d\u3002\u7ed3\u679c\u4ee5JSON\u7684\u5f62\u5f0f\u8fd4\u56de\uff0c\u4f5c\u4e3a\u793a\u4f8b\u5c31\u662f\u8fd9\u6837\u7684\u6837\u5b50\u3002<\/p>\n
{<\/span>\r\n  \"data\"<\/span>:<\/span> {<\/span>\r\n    \"all\"<\/span>:<\/span> [<\/span>\r\n      {<\/span>\r\n        \"id\"<\/span>:<\/span> 1<\/span>,<\/span>\r\n        \"name\"<\/span>:<\/span> \"alice\"<\/span>\r\n      },<\/span>\r\n      {<\/span>\r\n        \"id\"<\/span>:<\/span> 2<\/span>,<\/span>\r\n        \"name\"<\/span>:<\/span> \"bob\"<\/span>\r\n      },<\/span>\r\n    ],<\/span>\r\n    \"find_by_id\"<\/span>:<\/span> {<\/span>\r\n      \"id\"<\/span>:<\/span> 2<\/span>,<\/span>\r\n      \"name\"<\/span>:<\/span> \"bob\"<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\u662f\u53d8\u5f02\u3002<\/p>\n
mutation MyMutation {\r\n  store(my_object: {id: 3, name: \"charlie\"}) {\r\n    id\r\n  } \r\n  create(name: \"dave\") {\r\n    id\r\n  }\r\n}\r\n<\/code><\/pre>\n
\u6700\u7ec8\u7ed3\u679c\u5c31\u662f\u8fd9\u6837\u3002<\/p>\n
{<\/span>\r\n  \"data\"<\/span>:<\/span> {<\/span>\r\n    \"store\"<\/span>:<\/span> {<\/span>\r\n      \"id\"<\/span>:<\/span> 3<\/span>\r\n    },<\/span>\r\n    \"create\"<\/span>:<\/span> {<\/span>\r\n      \"id\"<\/span>:<\/span> 4<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\u5bf9\u6bcf\u4e2a\u64cd\u4f5c\u8fd4\u56de\u4e86\u7ed3\u679c\u3002<\/p>\n
\u5982\u679c\u53ea\u662f\u5148\u8bd5\u7740\u8fd0\u884cQuery\/Mutation\uff0c\u5927\u7ea6\u5e94\u8be5\u53ef\u4ee5\u7528\u8fd9\u4e2a\u7a0b\u5ea6\u3002<\/p>\n
\u5173\u4e8e Ctx \u548c Val \u7684\u8865\u5145\u8bf4\u660e<\/h2>\n
\u6587\u4ef6<\/p>\n
\u5728\u8fd9\u91cc\uff0c`ObjectType`\u548c`Field`\u662f\u5177\u6709`Ctx`\u548c`Val`\u7c7b\u578b\u53c2\u6570\u7684\u7c7b\u578b\u3002\u5177\u4f53\u5b9e\u73b0\u9700\u8981\u6d89\u53ca`ObjectType`\u548c`Field`\u3002<\/p>\n
Val\u662f\u6307\u5728GraphQL\u4e2d\u60f3\u8981\u8868\u8fbe\u4e3a\u7c7b\u578b\u7684\u4e8b\u7269\uff0c\u4f8b\u5982User\u6216Todo\u4e4b\u7c7b\u7684\u3002
\n\u5728Field#resolve\u4e2d\u5c06\u8fd4\u56de\u7684\u5bf9\u8c61\u7c7b\u578b\u89c6\u4e3aVal\u3002
\n\u5728\u58f0\u660eQuery\u6216Mutation\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528Unit\u3002<\/p>\n
Ctx\u662f\u6267\u884cGraphQL\u67e5\u8be2\u6240\u9700\u7684\u4e0a\u4e0b\u6587\uff0c\u5177\u4f53\u800c\u8a00\uff0c\u5b83\u63d0\u4f9b\u4e86\u53ef\u4ee5\u8bbf\u95ee\u6570\u636e\u5e93\u7684service\u6216repository\u7b49\u5bf9\u8c61\u3002
\n\u5982\u679c\u53ef\u4ee5\u8868\u793a\u7c7b\u578b\u800c\u65e0\u9700\u8bbf\u95ee\u6570\u636e\u5e93\uff0c\u5219Ctx\u53ef\u4ee5\u4e3aUnit\u3002
\n\u57fa\u672c\u4e0a\uff0c\u6267\u884cQuery\u6216Mutation\u65f6\u90fd\u4f1a\u9700\u8981\u5b83\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8fd9\u7bc7\u6587\u7ae0\u662f\u5173\u4e8e\u4ec0\u4e48\u7684\uff1f \u5f15\u5165\u4e86sangria\/sangria\u6765\u5b9e\u73b0\u5728Scala\u4e2d\u521b\u5efaGraphQL\u670d\u52a1\u5668\u3002 \u9605 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-48122","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u4f7f\u7528Scala\u7684Sangria\u5e93\u6765\u5b9e\u73b0GraphQL API - 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\/\u4f7f\u7528scala\u7684sangria\u5e93\u6765\u5b9e\u73b0graphql-api\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4f7f\u7528Scala\u7684Sangria\u5e93\u6765\u5b9e\u73b0GraphQL API\" \/>\n<meta property=\"og:description\" content=\"\u8fd9\u7bc7\u6587\u7ae0\u662f\u5173\u4e8e\u4ec0\u4e48\u7684\uff1f \u5f15\u5165\u4e86sangria\/sangria\u6765\u5b9e\u73b0\u5728Scala\u4e2d\u521b\u5efaGraphQL\u670d\u52a1\u5668\u3002 \u9605 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4f7f\u7528scala\u7684sangria\u5e93\u6765\u5b9e\u73b0graphql-api\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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