{"id":47922,"date":"2022-12-20T08:50:36","date_gmt":"2024-02-28T01:30:58","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8kotlin%e4%b8%ad%e4%bd%bf%e7%94%a8graphql%e5%a4%84%e7%90%86%e5%85%a8%e5%b1%80%e5%94%af%e4%b8%80%e7%9a%84node-id\/"},"modified":"2024-04-29T06:09:34","modified_gmt":"2024-04-28T22:09:34","slug":"%e5%9c%a8kotlin%e4%b8%ad%e4%bd%bf%e7%94%a8graphql%e5%a4%84%e7%90%86%e5%85%a8%e5%b1%80%e5%94%af%e4%b8%80%e7%9a%84node-id","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8kotlin%e4%b8%ad%e4%bd%bf%e7%94%a8graphql%e5%a4%84%e7%90%86%e5%85%a8%e5%b1%80%e5%94%af%e4%b8%80%e7%9a%84node-id\/","title":{"rendered":"\u5728Kotlin\u4e2d\u4f7f\u7528GraphQL\u5904\u7406\u5168\u5c40\u552f\u4e00\u7684Node ID"},"content":{"rendered":"

\u5f00\u59cb\u6446\u653e<\/h2>\n

\u5982\u679c\u8981\u5f00\u53d1GraphQL API\uff0c\u5728Web\u524d\u7aef\u65e0\u8bba\u4f7f\u7528\u54ea\u4e2aGraphQL\u5ba2\u6237\u7aef\u5e93\uff0c\u901a\u5e38\u4f1a\u9996\u5148\u8bbe\u8ba1API\u4ee5\u6ee1\u8db3Relay\u7684\u89c4\u8303\u3002\u4e3a\u4e86\u80fd\u591f\u901a\u8fc7\u4ec5\u6307\u5b9a\u8282\u70b9ID\u6765\u91cd\u65b0\u83b7\u53d6\u4efb\u4f55\u65f6\u95f4\u7684\u670d\u52a1\u5668\u8d44\u6e90\uff0c\u9700\u8981\u4e3a\u5b9e\u4f53\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u7684ID\u673a\u5236\u3002\u8981\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u6709\u5f88\u591a\u4e8b\u60c5\u8981\u505a\uff0c\u4f46\u9996\u5148\u9700\u8981\u5728\u670d\u52a1\u5668\u7aef\u4e3a\u5b9e\u4f53\u63d0\u4f9b\u4e00\u4e2a\u5168\u5c40\u552f\u4e00\u7684ID\u3002<\/p>\n

\u5982\u679c\u5728\u5c06\u5b9e\u4f53\u8bb0\u5f55\u5230\u6570\u636e\u5e93\u65f6\u91c7\u7528UUID\u800c\u4e0d\u662f\u81ea\u589eID\u4f5c\u4e3a\u4e3b\u952e\uff0c\u90a3\u4e48\u53ef\u4ee5\u91cd\u7528\u8be5\u503c\u3002\u4f46\u662f\uff0c\u901a\u5e38\u4f1a\u5206\u914d\u8fde\u7eed\u7f16\u53f7\u7684ID\u3002\u7531\u4e8e\u8fde\u7eed\u7f16\u53f7\u7684ID\u5f88\u96be\u6ee1\u8db3\u5b9e\u4f53\u7684\u8de8\u8d8a\u6027\u552f\u4e00\u6027\uff0c\u6240\u4ee5\u9700\u8981\u7a0d\u52a0\u8bbe\u8ba1\u3002\u5728Relay\u7684\u5b98\u65b9\u6307\u5357\u4e2d\uff0c\u5b83\u4eec\u89e3\u91ca\u4e86\u4e00\u79cd\u65b9\u6cd5\uff0c\u5927\u81f4\u5982\u4e0b\u3002<\/p>\n

Node \u63a5\u53e3\u548c node \u5b57\u6bb5\u5047\u5b9a\u6b64 refetch \u9700\u8981\u5168\u5c40\u552f\u4e00\u6807\u8bc6\u7b26\u3002\u5982\u679c\u6ca1\u6709\u5168\u5c40\u552f\u4e00\u6807\u8bc6\u7b26\u7684\u7cfb\u7edf\u901a\u5e38\u53ef\u4ee5\u901a\u8fc7\u5c06\u7c7b\u578b\u4e0e\u7c7b\u578b\u76f8\u5173\u7684 ID \u7ec4\u5408\u6765\u5408\u6210\u5b83\u4eec\uff0c\u8fd9\u5c31\u662f\u6b64\u793a\u4f8b\u4e2d\u6240\u505a\u7684\u3002
\n\u6211\u4eec\u5f97\u5230\u7684 ID \u662f base64 \u5b57\u7b26\u4e32\u3002ID \u88ab\u8bbe\u8ba1\u4e3a\u4e0d\u900f\u660e\uff08\u5728 node \u7684 id \u53c2\u6570\u4e2d\u5e94\u8be5\u4f20\u9012\u7684\u662f\u7cfb\u7edf\u4e2d\u67d0\u4e2a\u5bf9\u8c61\u67e5\u8be2 id \u7684\u7ed3\u679c\uff09\uff0c\u800c\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c base64 \u7f16\u7801\u662f GraphQL \u4e2d\u7684\u4e00\u79cd\u6709\u7528\u60ef\u4f8b\uff0c\u7528\u4e8e\u63d0\u9192\u67e5\u770b\u8005\u8be5\u5b57\u7b26\u4e32\u662f\u4e00\u4e2a\u4e0d\u900f\u660e\u7684\u6807\u8bc6\u7b26\u3002<\/p><\/blockquote>\n

\u57fa\u672c\u4e0a\u5c31\u662f\u5c07\u8868\u793a\u5be6\u9ad4\u540d\u7a31\u7684\u5b57\u4e32\u548c\u9023\u7e8c\u7de8\u865fID\u7d50\u5408\u8d77\u4f86\u7684\u503c\uff0c\u9032\u884cBase64\u7de8\u78bc\uff0c\u7136\u5f8c\u5c07\u7de8\u78bc\u5f8c\u7684\u5b57\u4e32\u4f5c\u70baID\u4f7f\u7528\u3002\u9806\u4fbf\u63d0\u4e00\u4e0b\uff0cRelay\u63d0\u4f9b\u7684\u7bc4\u4f8b\u4e2d\uff0c\u4ed6\u5011\u662f\u4f7f\u7528\u5192\u865f\uff08:\uff09\u5c07\u5be6\u9ad4\u540d\u7a31\u548c\u9023\u7e8c\u7de8\u865fID\u5206\u9694\uff0c\u518d\u9032\u884cBase64\u7de8\u78bc\u3002 \u9075\u7167\u9019\u500b\u65b9\u6cd5\uff0c\u57fa\u672c\u4e0a\u4e0d\u6703\u51fa\u932f\u3002<\/p>\n

\u5728\u51b3\u5b9a\u5c1d\u8bd5\u6a21\u4eff\u4e4b\u524d\uff0c\u5e76\u6ca1\u6709\u505a\u4ec0\u4e48\u7279\u522b\u56f0\u96be\u7684\u4e8b\u60c5\uff0c\u6240\u4ee5\u5373\u4f7f\u81ea\u5df1\u7f16\u5199\u4e86\u4e00\u4e2a\u7528\u4e8e\u751f\u6210ID\u7684\u65b9\u6cd5\u4e5f\u5b8c\u5168\u53ef\u4ee5\u3002\u4f46\u8003\u8651\u5230\u8fd9\u79cd\u5904\u7406\u7684\u6c34\u5e73\u53ef\u80fd\u662f\u6bcf\u4e2a\u4eba\u90fd\u9700\u8981\u7684\uff0c\u800c\u4e14\u5f88\u53ef\u80fd\u5df2\u7ecf\u5728\u5e93\u4e2d\u5b9e\u65bd\u4e86\uff0c\u6240\u4ee5\u6211\u8fdb\u884c\u4e86\u4e00\u4e9b\u8c03\u67e5\uff0c\u672c\u7bc7\u6587\u7ae0\u5c31\u662f\u5173\u4e8e\u8fd9\u4e9b\u8c03\u67e5\u7684\u5185\u5bb9\u3002\u8fd9\u91cc\u63d0\u5230\u7684\u5e93\u5f53\u7136\u6307\u7684\u662f\u6807\u9898\u4e2d\u7684GraphQL Kotlin\u3002\u867d\u7136\u5f88\u5c11\u542c\u8bf4\u56fd\u5185\u4f7f\u7528GraphQL Kotlin\u7684\u6848\u4f8b\uff0c\u4f46\u5982\u679c\u7528Kotlin\u7f16\u5199SpringBoot\u5e76\u521b\u5efaGraphQL API\uff0c\u4f7f\u7528GraphQL Kotlin\u4f5c\u4e3a\u5176\u6269\u5c55\u7248\u672c\u800c\u4e0d\u662f\u76f4\u63a5\u4f7f\u7528GraphQL Java\u4f1a\u66f4\u52a0\u65b9\u4fbf\u5b9e\u7528\uff0c\u6240\u4ee5\u6211\u63a8\u8350\u4f7f\u7528\u5b83\u3002<\/p>\n

\u8c03\u67e5\u65e5\u5fd7<\/h2>\n

\u9996\u5148\uff0c\u6211\u6d4f\u89c8\u4e86GraphQL Kotlin\u7684\u5b98\u65b9\u6587\u6863\uff0c\u4f46\u53ef\u60dc\u5e76\u6ca1\u6709\u627e\u5230\u76f8\u5173\u63cf\u8ff0\u3002\u7136\u800c\uff0c\u5982\u679c\u56de\u6eaf\u81f3GraphQL Kotlin\u6240\u57fa\u4e8e\u7684GraphQL Java\u7684\u6587\u6863\uff0c\u6211\u4eec\u53ef\u4ee5\u5728Relay Support\u4e00\u7ae0\u4e2d\u627e\u5230\u5982\u4e0b\u63cf\u8ff0\u3002<\/p>\n

\u57fa\u672c\u7684Relay\u652f\u6301\u5df2\u7ecf\u5305\u542b\u5728\u5185\u3002
\n\u8bf7\u67e5\u770bhttps:\/\/github.com\/graphql-java\/todomvc-relay-java\u4ee5\u83b7\u53d6\u4e00\u4e2a\u5b8c\u6574\u7684\u793a\u4f8b\u9879\u76ee\u3002<\/p><\/blockquote>\n

\u8fd9\u4e2a\u6837\u672c\u4ee3\u7801\u4f3c\u4e4e\u6709\u4e00\u4e9b\u63d0\u793a\u3002\u6211\u7a0d\u5fae\u770b\u4e86\u4e00\u4e0b\uff0c\u5728TodoSchema.java\u6587\u4ef6\u5185\u627e\u5230\u4e86\u4e00\u4e9b\u770b\u8d77\u6765\u50cf\u662f\u76f8\u5173\u5b9e\u73b0\u7684\u90e8\u5206\u3002<\/p>\n

private<\/span> void<\/span> createUserType<\/span>()<\/span> {<\/span>\r\n        userType<\/span> =<\/span> newObject<\/span>()<\/span>\r\n                .<\/span>name<\/span>(<\/span>\"User\"<\/span>)<\/span>\r\n                .<\/span>field<\/span>(<\/span>newFieldDefinition<\/span>()<\/span>\r\n                        .<\/span>name<\/span>(<\/span>\"id\"<\/span>)<\/span>\r\n                        .<\/span>type<\/span>(<\/span>new<\/span> GraphQLNonNull<\/span>(<\/span>GraphQLID<\/span>))<\/span>\r\n                        .<\/span>dataFetcher<\/span>(<\/span>environment<\/span> -><\/span> {<\/span>\r\n                                    User<\/span> user<\/span> =<\/span> (<\/span>User<\/span>)<\/span> environment<\/span>.<\/span>getSource<\/span>();<\/span>\r\n                                    return<\/span> relay<\/span>.<\/span>toGlobalId<\/span>(<\/span>\"User\"<\/span>,<\/span> user<\/span>.<\/span>getId<\/span>());<\/span>  \/\/ <- \u3053\u308c<\/span>\r\n                                }<\/span>\r\n                        )<\/span>\r\n                        .<\/span>build<\/span>())<\/span>\r\n                .<\/span>field<\/span>(<\/span>newFieldDefinition<\/span>()<\/span>\r\n                        .<\/span>name<\/span>(<\/span>\"todos\"<\/span>)<\/span>\r\n                        .<\/span>type<\/span>(<\/span>connectionFromUserToTodos<\/span>)<\/span>\r\n                        .<\/span>argument<\/span>(<\/span>relay<\/span>.<\/span>getConnectionFieldArguments<\/span>())<\/span>\r\n                        .<\/span>dataFetcher<\/span>(<\/span>simpleConnection<\/span>)<\/span>\r\n                        .<\/span>build<\/span>())<\/span>\r\n                .<\/span>withInterface<\/span>(<\/span>nodeInterface<\/span>)<\/span>\r\n                .<\/span>build<\/span>();<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u770b\u8d77\u6765relay.toGlobalId(“User”, user.getId())\u8fd9\u90e8\u5206\u662f\u76f8\u5bf9\u5408\u7406\u7684\u3002<\/p>\n
\u5f53\u6211\u67e5\u770bGraphQL Java\u6e90\u7801\u4e2d\u7684\u5b9a\u4e49\u65f6\uff0c\u5927\u81f4\u662f\u8fd9\u6837\u7684\u3002<\/p>\n
private<\/span> static<\/span> final<\/span> java<\/span>.<\/span>util<\/span>.<\/span>Base64<\/span>.<\/span>Encoder<\/span> encoder<\/span> =<\/span> java<\/span>.<\/span>util<\/span>.<\/span>Base64<\/span>.<\/span>getUrlEncoder<\/span>().<\/span>withoutPadding<\/span>();<\/span>\r\nprivate<\/span> static<\/span> final<\/span> java<\/span>.<\/span>util<\/span>.<\/span>Base64<\/span>.<\/span>Decoder<\/span> decoder<\/span> =<\/span> java<\/span>.<\/span>util<\/span>.<\/span>Base64<\/span>.<\/span>getUrlDecoder<\/span>();<\/span>\r\n\r\npublic<\/span> String<\/span> toGlobalId<\/span>(<\/span>String<\/span> type<\/span>,<\/span> String<\/span> id<\/span>)<\/span> {<\/span>\r\n    return<\/span> encoder<\/span>.<\/span>encodeToString<\/span>((<\/span>type<\/span> +<\/span> \":\"<\/span> +<\/span> id<\/span>).<\/span>getBytes<\/span>(<\/span>StandardCharsets<\/span>.<\/span>UTF_8<\/span>));<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u786e\u5b9e\u7b26\u5408\u6211\u6240\u671f\u671b\u7684\u5185\u5bb9\u3002\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u8fd8\u6709\u9006\u5411\u8f6c\u6362\u7684\u65b9\u6cd5\uff08\u5c06\u552f\u4e00ID\u8f6c\u4e3a\u5b9e\u4f53\u540d\u79f0\u548c\u8fde\u7eedID\uff09\u4e5f\u88ab\u6b63\u786e\u5730\u51c6\u5907\u597d\u4e86\u3002<\/p>\n
public<\/span> static<\/span> class<\/span> ResolvedGlobalId<\/span> {<\/span>\r\n\r\n        public<\/span> ResolvedGlobalId<\/span>(<\/span>String<\/span> type<\/span>,<\/span> String<\/span> id<\/span>)<\/span> {<\/span>\r\n            this<\/span>.<\/span>type<\/span> =<\/span> type<\/span>;<\/span>\r\n            this<\/span>.<\/span>id<\/span> =<\/span> id<\/span>;<\/span>\r\n        }<\/span>\r\n\r\n        private<\/span> final<\/span> String<\/span> type<\/span>;<\/span>\r\n        private<\/span> final<\/span> String<\/span> id<\/span>;<\/span>\r\n\r\n        public<\/span> String<\/span> getType<\/span>()<\/span> {<\/span>\r\n            return<\/span> type<\/span>;<\/span>\r\n        }<\/span>\r\n\r\n        public<\/span> String<\/span> getId<\/span>()<\/span> {<\/span>\r\n            return<\/span> id<\/span>;<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n\/\/(\u4e2d\u7565)<\/span>\r\n\r\npublic<\/span> ResolvedGlobalId<\/span> fromGlobalId<\/span>(<\/span>String<\/span> globalId<\/span>)<\/span> {<\/span>\r\n        String<\/span>[]<\/span> split<\/span> =<\/span> new<\/span> String<\/span>(<\/span>decoder<\/span>.<\/span>decode<\/span>(<\/span>globalId<\/span>),<\/span> StandardCharsets<\/span>.<\/span>UTF_8<\/span>).<\/span>split<\/span>(<\/span>\":\"<\/span>,<\/span> 2<\/span>);<\/span>\r\n        if<\/span> (<\/span>split<\/span>.<\/span>length<\/span> !=<\/span> 2<\/span>)<\/span> {<\/span>\r\n            throw<\/span> new<\/span> IllegalArgumentException<\/span>(<\/span>String<\/span>.<\/span>format<\/span>(<\/span>\"expecting a valid global id, got %s\"<\/span>,<\/span> globalId<\/span>));<\/span>\r\n        }<\/span>\r\n        return<\/span> new<\/span> ResolvedGlobalId<\/span>(<\/span>split<\/span>[<\/span>0<\/span>],<\/span> split<\/span>[<\/span>1<\/span>]);<\/span>\r\n    }<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f7f\u7528\u8fd9\u4e24\u79cd\u65b9\u6cd5\uff0c\u552f\u4e00ID\u7684\u95ee\u9898\u4f3c\u4e4e\u53ef\u4ee5\u89e3\u51b3\u3002<\/p>\n
\u4e00\u4e2a\u5b9e\u65bd\u7684\u793a\u4f8b<\/h2>\n
\u5047\u8bbe\u4ece\u6570\u636e\u5e93\u4e2d\u53d6\u51fa\u7684\u5b9e\u4f53\u7684ID\u662fInt\u7c7b\u578b\uff0c\u4e3a\u4e86\u5c06\u5176\u8f6c\u6362\u4e3a\u552f\u4e00ID\u5e76\u5305\u542b\u5728API\u54cd\u5e94\u4e2d\uff0c\u6216\u8005\u4eceAPI\u8bf7\u6c42\u4e2d\u63a5\u6536\u5230\u552f\u4e00ID\u5e76\u5c06\u5176\u91cd\u65b0\u8f6c\u6362\u4e3a\u8fde\u7eedID\u4ee5\u4fbf\u5728\u6570\u636e\u5e93\u4e2d\u8fdb\u884c\u641c\u7d22\uff0c\u6211\u5b9a\u4e49\u4e86\u4ee5\u4e0b\u6269\u5c55\u51fd\u6570\uff0c\u4ee5\u4fbf\u6267\u884c\u8fd9\u4e9b\u64cd\u4f5c\u66f4\u52a0\u65b9\u4fbf\u3002<\/p>\n
import<\/span> com.expediagroup.graphql.generator.scalars.ID<\/span>\r\nimport<\/span> graphql.relay.Relay<\/span>\r\n\r\nfun<\/span> ID<\/span>.<\/span>toInt<\/span>():<\/span> Int<\/span> {<\/span>\r\n    val<\/span> globalId<\/span> =<\/span> Relay<\/span>().<\/span>fromGlobalId<\/span>(<\/span>this<\/span>.<\/span>toString<\/span>())<\/span>\r\n\r\n    return<\/span> globalId<\/span>.<\/span>id<\/span>.<\/span>trim<\/span>().<\/span>toInt<\/span>()<\/span>\r\n}<\/span>\r\n\r\nfun<\/span> Int<\/span>.<\/span>toID<\/span>(<\/span>type<\/span>:<\/span> String<\/span>):<\/span> ID<\/span> {<\/span>\r\n    val<\/span> globalId<\/span> =<\/span> Relay<\/span>().<\/span>toGlobalId<\/span>(<\/span>type<\/span>,<\/span> this<\/span>.<\/span>toString<\/span>())<\/span>\r\n\r\n    return<\/span> ID<\/span>(<\/span>globalId<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
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