{"id":48349,"date":"2023-01-30T10:44:06","date_gmt":"2023-09-11T15:53:22","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8hasura%e5%9c%a8postgresql%e4%b8%ad%e9%80%9a%e8%bf%87graphql%e8%af%a2%e9%97%ae%ef%bc%8c%e5%b9%b6%e6%8e%a5%e6%94%b6%e4%ba%86json%e3%80%82\/"},"modified":"2024-01-15T12:35:28","modified_gmt":"2024-01-15T04:35:28","slug":"%e6%88%91%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8hasura%e5%9c%a8postgresql%e4%b8%ad%e9%80%9a%e8%bf%87graphql%e8%af%a2%e9%97%ae%ef%bc%8c%e5%b9%b6%e6%8e%a5%e6%94%b6%e4%ba%86json%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%b0%9d%e8%af%95%e4%bd%bf%e7%94%a8hasura%e5%9c%a8postgresql%e4%b8%ad%e9%80%9a%e8%bf%87graphql%e8%af%a2%e9%97%ae%ef%bc%8c%e5%b9%b6%e6%8e%a5%e6%94%b6%e4%ba%86json%e3%80%82\/","title":{"rendered":"\u6211\u5c1d\u8bd5\u4f7f\u7528Hasura\u5728PostgreSQL\u4e2d\u901a\u8fc7GraphQL\u8be2\u95ee\uff0c\u5e76\u63a5\u6536\u4e86JSON"},"content":{"rendered":"

\u7531\u4e8efeedly\u4e0a\u51fa\u73b0\u4e86\u5e7f\u544a\uff0c\u6240\u4ee5\u6211\u5c1d\u8bd5\u4f7f\u7528\u4e86\u4e00\u4e2a\u53eb\u505aHasura\u7684\u4e1c\u897f\u3002\u5b83\u53ef\u4ee5\u8f7b\u677e\u5730\u4f7f\u7528GraphQL API\u5728JSON\u683c\u5f0f\u4e2d\u8fd4\u56dePostgreSQL\u7684\u6570\u636e\u3002\u8be6\u7ec6\u4e86\u89e3Hasura\u7b49\u5c06GraphQL\u548c\u5173\u7cfb\u6570\u636e\u5e93\u7ed3\u5408\u7684\u5185\u5bb9\uff0c\u8bf7\u67e5\u770bHasura\u9875\u9762\u3002<\/p>\n

\u56e0\u4e3a\u6211\u662f\u7b2c\u4e00\u6b21\u4f7f\u7528GraphQL\uff0c\u6240\u4ee5\u4e0d\u786e\u5b9a\u6211\u80fd\u5199\u5f97\u591a\u51c6\u786e\uff0c\u4f46\u662f\u6211\u611f\u89c9\u6211\u638c\u63e1\u4e86\u6559\u7a0b\u7684\u8fdb\u5c55\u65b9\u6cd5\uff0c\u6240\u4ee5\u6211\u51b3\u5b9a\u7559\u4e0b\u8fd9\u6b21\u505a\u8fc7\u7684\u8bb0\u5f55\uff0c\u4ee5\u4f9b\u5c06\u6765\u4f7f\u7528\u65f6\u53c2\u8003\u3002<\/p>\n

\u5f15\u5165\u548c\u6700\u521d\u7684\u8be2\u95ee<\/h2>\n

\u6839\u636ehttps:\/\/hasura.io\/\u7684\u63a8\u8350\uff0c\u5c1d\u8bd5\u4f7f\u7528Heroku\u662f\u4e00\u4e2a\u597d\u9009\u62e9\u3002\u4f60\u53ef\u4ee5\u5728\u5916\u51fa\u65f6\u4f7f\u7528\u5e73\u677f\u7535\u8111\u7b49\u8bbe\u5907\u8fdb\u884c\u64cd\u4f5c\u3002\u53c2\u8003Heroku\u7684\u5feb\u901f\u5165\u95e8\u6307\u5357\uff0c\u5728Heroku\u4e0a\u8fdb\u884c\u90e8\u7f72\u3002<\/p>\n

\u5982\u679c\u90e8\u7f72\u6210\u529f\uff0c\u6309\u7167”Making your first GraphQL query”\u7684\u6307\u793a\u8fdb\u884c\u64cd\u4f5c\uff0c\u4f1a\u8fd4\u56de\u4e00\u4e2aJSON\u3002<\/p>\n

\u83b7\u53d6\u8868\u8fde\u63a5\u7684\u7ed3\u679c<\/h2>\n

\u4f5c\u4e3a\u4e00\u4e2a\u66f4\u52a0\u73b0\u5b9e\u7684\u4f8b\u5b50\uff0c\u5f53\u6211\u60f3\u8981\u63a5\u6536JOIN\u64cd\u4f5c\u7684\u7ed3\u679c\u65f6\uff0c\u6211\u6709\u70b9\u56f0\u60d1\u3002\u5728Schema\u4e2d\u5199\u7740\u201cGraphQL\u6a21\u5f0f\u65e0\u9700\u7f16\u5199\u201d\uff0c\u6240\u4ee5\u6211\u8bef\u4ee5\u4e3a\u6211\u4e0d\u9700\u8981\u9605\u8bfb\u540e\u9762\u7684\u5185\u5bb9\uff0c\u7ed3\u679c\u9677\u5165\u4e86\u56f0\u5883\u3002\u5b9e\u9645\u4e0a\uff0c\u5982\u679c\u4e0d\u7ee7\u7eed\u9605\u8bfbBasics\uff0c\u5c31\u65e0\u6cd5\u7f16\u5199\u5b9e\u7528\u7684\u67e5\u8be2\u3002<\/p>\n

\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a “article” \u7684\u6570\u636e\u8868\u548c\u4e00\u4e2a\u540d\u4e3a “author” \u7684\u6570\u636e\u8868\uff0c\u4ee5\u4fbf\u5c1d\u8bd5\u4f7f\u7528 mutation \u548c query\u3002<\/h3>\n

\u672c\u6587\u5c06\u521b\u5efa\u4e00\u4e2a\u8868\u3002\u5728\u6570\u636e\u9009\u9879\u5361\u4e2d\u6309\u7167\u57fa\u7840\u753b\u9762\u4e0a\u7684\u793a\u4f8b\u521b\u5efa\u8868\u683c\u3002<\/p>\n

\u8bf7\u786e\u8ba4\u6570\u636e\u5e93\u8868\u7684\u6a21\u5f0f\u3002\u8fd4\u56de\u5230GraphQL\u9009\u9879\u5361\uff0c\u70b9\u51fb”< Docs”\u6253\u5f00Documentation Explorer\uff0c\u7136\u540e\u70b9\u51fbquery_root\uff0c\u5728Basics\u9875\u9762\u4e0a\u53ef\u4ee5\u770b\u5230\u4e0eQuery\u9875\u9762\u4e0a\u76f8\u540c\u7684\u5185\u5bb9\u3002\u540c\u65f6\uff0c\u70b9\u51fb”< Schema”\u8fd4\u56de\u9875\u9762\uff0c\u70b9\u51fbmutation_root\uff0c\u5728Basics\u9875\u9762\u4e0a\u53ef\u4ee5\u786e\u8ba4\u5df2\u6ce8\u518c\u4e86\u4e0einsert\/upsert mutation\u3001update mutation\u548cdelete mutation\u76f8\u540c\u7684\u5185\u5bb9\u3002\u7136\u800c\uff0c\u5b57\u6bb5\u7684\u987a\u5e8f\u5374\u4e0d\u540c\u3002\u6211\u4e0d\u77e5\u9053\u5982\u4f55\u786e\u8ba4\u5bf9\u8c61\u7c7b\u578b\u3002<\/p>\n

\u8bf7\u540c\u6837\u521b\u5efa\u4e00\u4e2a\u4f5c\u8005\u8868\uff08author table\uff09\u3002\u5c06id\u8bbe\u4e3a\u6574\u6570\u7c7b\u578b\uff08\u81ea\u52a8\u9012\u589e\uff09\uff0c\u5c06name\u8bbe\u4e3a\u6587\u672c\u7c7b\u578b\uff0c\u6211\u8ba4\u4e3a\u6700\u597d\u5c06id\u8bbe\u4e3a\u4e3b\u952e\u3002<\/p>\n

\u901a\u8fc7\u8fd9\u4e2a\uff0cBasics\u9875\u9762\u5e95\u90e8\u7684query\u548cmutation\u80fd\u591f\u8fd0\u884c\u3002<\/p>\n

\u5efa\u7acb\u5173\u7cfb<\/h3>\n

\u6309\u7167\u300a\u8868\u683c\/\u89c6\u56fe\u4e4b\u95f4\u7684\u5173\u7cfb \u4f7f\u7528\u5916\u952e\u300b\u7684\u8981\u6c42\uff0c\u6dfb\u52a0\u5916\u952e\u7ea6\u675f\u5e76\u8bbe\u7f6e\u5173\u7cfb\u3002\u7531\u4e8e\u5c1a\u672a\u6267\u884c\u63d2\u5165\u64cd\u4f5c\uff0c\u56e0\u6b64\u6b64\u65f6\u67e5\u8be2\u7ed3\u679c\u4e3a\u7a7a\u3002<\/p>\n

\u70ba\u4e86\u7372\u5f97\u8207\u6587\u66f8\u76f8\u540c\u7684\u67e5\u8a62\u7d50\u679c\uff0c\u8acb\u57f7\u884c\u4ee5\u4e0b\u8b8a\u52d5\u64cd\u4f5c\u4e26\u5c07\u884c\u63d2\u5165\u8868\u683c\u4e2d\u3002<\/p>\n

mutation<\/span> add_author<\/span> {<\/span>\r\n  insert_author<\/span>(<\/span>\r\n    objects<\/span>:<\/span> [<\/span>\r\n      {<\/span>id<\/span>:<\/span> 1<\/span>,<\/span> name<\/span>:<\/span> \"Justin\"<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 2<\/span>,<\/span> name<\/span>:<\/span> \"Beltran\"<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 3<\/span>,<\/span> name<\/span>:<\/span> \"Sidney\"<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 4<\/span>,<\/span> name<\/span>:<\/span> \"Anjela\"<\/span>}<\/span>\r\n    ]<\/span>\r\n  )<\/span> {<\/span>\r\n    affected_rows<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\nmutation<\/span> add_article<\/span> {<\/span>\r\n  insert_article<\/span>(<\/span>\r\n    objects<\/span>:<\/span> [<\/span>\r\n      {<\/span>id<\/span>:<\/span> 1<\/span>,<\/span> title<\/span>:<\/span> \"sit amet\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 5<\/span>,<\/span> author_id<\/span>:<\/span> 4<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 2<\/span>,<\/span> title<\/span>:<\/span> \"a nibh\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 1<\/span>,<\/span> author_id<\/span>:<\/span> 2<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 3<\/span>,<\/span> title<\/span>:<\/span> \"amet justo morbi\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 5<\/span>,<\/span> author_id<\/span>:<\/span> 4<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 6<\/span>,<\/span> title<\/span>:<\/span> \"sapien ut\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 2<\/span>,<\/span> author_id<\/span>:<\/span> 3<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 9<\/span>,<\/span> title<\/span>:<\/span> \"sit amet\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 5<\/span>,<\/span> author_id<\/span>:<\/span> 2<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 11<\/span>,<\/span> title<\/span>:<\/span> \"turpis eget\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 3<\/span>,<\/span> author_id<\/span>:<\/span> 3<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 14<\/span>,<\/span> title<\/span>:<\/span> \"congue etiam justo\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 3<\/span>,<\/span> author_id<\/span>:<\/span> 3<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 15<\/span>,<\/span> title<\/span>:<\/span> \"vel dapibus at\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 1<\/span>,<\/span> author_id<\/span>:<\/span> 1<\/span>},<\/span>\r\n      {<\/span>id<\/span>:<\/span> 16<\/span>,<\/span> title<\/span>:<\/span> \"sem duis aliquam\"<\/span>,<\/span> content<\/span>:<\/span> \"\"<\/span>,<\/span> rating<\/span>:<\/span> 4<\/span>,<\/span> author_id<\/span>:<\/span> 1<\/span>}<\/span>\r\n    ]<\/span>\r\n  )<\/span> {<\/span>\r\n    affected_rows<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u6587\u6863\u4e2d\u6240\u8ff0\u7684\u67e5\u8be2\u540e\uff0c\u60a8\u53ef\u80fd\u4f1a\u5f97\u5230\u7c7b\u4f3c\u7684\u7ed3\u679c\u3002\u6392\u5e8f\u65b9\u5f0f\u53ef\u80fd\u4f1a\u4e0d\u540c\uff0c\u5982\u5f80\u5e38\u4e00\u6837\u3002<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a”author_avg_rating”\u7684\u89c6\u56fe\u3002\u9009\u62e9\u5de6\u4e0b\u89d2\u7684Data\u6807\u7b7e\u4e2d\u7684SQL\u9009\u9879\uff0c\u5e76\u786e\u4fdd”Track table”\u9009\u9879\u88ab\u9009\u4e2d\uff0c\u7136\u540e\u6267\u884c\u4ee5\u4e0b\u67e5\u8be2\u3002\u8be5\u89c6\u56fe\u5c06\u88ab\u521b\u5efa\u5e76\u6dfb\u52a0\u5230Hasura\u4e2d\u3002<\/p>\n
CREATE<\/span> VIEW<\/span> author_avg_rating<\/span> (<\/span>id<\/span>,<\/span> avg<\/span>)<\/span> AS<\/span>\r\nSELECT<\/span> author_id<\/span>,<\/span> avg<\/span>(<\/span>rating<\/span>)<\/span>\r\nFROM<\/span> article<\/span>\r\nGROUP<\/span> BY<\/span> author_id<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u6309\u7167\u201c\u65e0\u5916\u952e\u7684\u8868\/\u89c6\u56fe\u4e4b\u95f4\u7684\u5173\u7cfb\u201d\u6765\u8fdb\u884c\u64cd\u4f5c\u3002\u8bf7\u6839\u636e\u63cf\u8ff0\u6587\u672c\u7684\u8981\u6c42\uff0c\u5728\u5c4f\u5e55\u622a\u56fe\u548c\u63cf\u8ff0\u6587\u672c\u4e0d\u4e00\u81f4\u7684\u5730\u65b9\u8fdb\u884c\u8f93\u5165\u3002<\/p>\n
\u4e3a\u4ec0\u4e48\u67e5\u8be2\u7684\u793a\u4f8b\u5728\u521d\u59cb\u72b6\u6001\u4e0b\u4f3c\u4e4e\u662f\u7a7a\u767d\u7684\uff0c\u4f46\u70b9\u51fb\u540e\u4f1a\u663e\u793a\u51fa\u6765\u3002\u6267\u884c\u793a\u4f8b\u540e\u901a\u5e38\u4f1a\u5f97\u5230\u7c7b\u4f3c\u7684\u7ed3\u679c\u3002<\/p>\n
\u7136\u540e\u7ee7\u7eed\u5411\u524d<\/h2>\n
\u6839\u636e\u89c6\u89d2\u5b9a\u5236\u67b6\u6784\uff0c\u867d\u7136\u6211\u8fd8\u6ca1\u6709\u5f00\u59cb\u505a\uff0c\u4f46\u6216\u8bb8\u53ef\u4ee5\u4ece\u540c\u6837\u7684\u601d\u8def\u7740\u624b\u89e3\u51b3\u3002\u63a5\u4e0b\u6765\u5c31\u4ea4\u7ed9\u4f60\u4e86\u2026\u2026\u5495\u5657\u5657\u2026\uff01<\/p>\n
\u4f7f\u7528\u54ea\u4e2a\u5de5\u5177\u6765\u7b5b\u9009\u7ed3\u679c<\/h2>\n
\u79bb\u5f00\u6559\u7a0b\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u201cwhere\u201d\u7684\u4f8b\u5b50\u3002\u4eceGraphQL\u5b98\u65b9\u7f51\u9875\u7684\u4f8b\u5b50\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u67e5\u8be2\u901a\u5e38\u4f7f\u7528\u4ee5\u4e0b\u683c\u5f0f\uff0c\u4f46\u5728Hasura\u4e2d\u65e0\u6cd5\u5b9e\u73b0\u3002<\/p>\n
query<\/span> {<\/span>\r\n  author<\/span>(<\/span>id<\/span>:<\/span> 1<\/span>)<\/span> {<\/span>\r\n    name<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728GRAPHIQL\u7684\u9009\u9879\u5361\u4e2d\u70b9\u51fb”< Docs”\uff0c\u6253\u5f00Documentation Explorer\uff0c\u518d\u70b9\u51fbquery_root\uff0c\u5373\u53ef\u770b\u5230\u4ee5\u4e0b\u5185\u5bb9\u3002<\/p>\n
author(\r\nlimit: Int\r\noffset: Int\r\norder_by: [author_order_by!]\r\nwhere: author_bool_exp\r\n): [author!]!\r\n<\/code><\/pre>\n
\u70b9\u51fb\u201cauthor_bool_exp\u201d\u540e\uff0c\u5c06\u4f9d\u6b21\u663e\u793a\u8bed\u6cd5\u89c4\u5219\uff0c\u4ece\u800c\u53ef\u4ee5\u7406\u89e3\u5728\u201cwhere\u201d\u4e2d\u7f16\u5199\u7684\u683c\u5f0f…\u5e94\u8be5\u662f\u5982\u6b64\uff0c\u4f46\u7531\u4e8e\u5bf9GraphQL\u4e0d\u719f\u6089\uff0c\u6240\u4ee5\u5e76\u4e0d\u6e05\u695a\u3002\u901a\u8fc7\u67e5\u770b\u5b58\u5728\u7684\u793a\u4f8b\uff0c\u6211\u7ec8\u4e8e\u660e\u767d\u4e86\u3002\u4ee5\u4e0b\u662f\u63d0\u53d6id\u4e3a1\u7684\u8bb0\u5f55\u7684\u540d\u79f0\u7684\u67e5\u8be2\uff1a<\/p>\n
query<\/span> {<\/span>\r\n  author<\/span> (<\/span>where<\/span>:<\/span> {<\/span>id<\/span>:<\/span> {<\/span>_eq<\/span>:<\/span> 1<\/span>}})<\/span> {<\/span>\r\n    name<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
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