{"id":47890,"date":"2023-02-06T03:46:53","date_gmt":"2022-11-02T03:43:37","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%b8%8egraphql%e5%85%bc%e5%ae%b9%e7%9a%84orm-prisma\/"},"modified":"2024-04-29T13:19:24","modified_gmt":"2024-04-29T05:19:24","slug":"%e4%b8%8egraphql%e5%85%bc%e5%ae%b9%e7%9a%84orm-prisma","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%b8%8egraphql%e5%85%bc%e5%ae%b9%e7%9a%84orm-prisma\/","title":{"rendered":"\u4e0eGraphQL\u517c\u5bb9\u7684ORM Prisma"},"content":{"rendered":"

\u8fd9\u7bc7\u6587\u7ae0\u662fGraphQL Advent Calendar 2020\u7684\u7b2c\u5341\u7bc7\u6587\u7ae0\u3002
\n\u4e0a\u4e00\u7bc7\u6587\u7ae0\u662f\u7531@mtsmfm\u5f00\u53d1\u7684Swift\u7528graphql-codegen\u63d2\u4ef6\u2014graphql-codegen-swift-operations\u3002<\/p>\n

\u9996\u5148<\/h1>\n

\u6211\u8ba4\u4e3aPrisma\u662f\u4e00\u79cd\u7528\u4e8e\u5b9e\u73b0GraphQL\u7684\u5ba2\u6237\u7aef\u5e93\uff0cORM\uff08\u5728Prisma1\u4e2d\u8fd8\u5305\u62ecGraphQL\u670d\u52a1\u5668\uff09\u800c\u88ab\u5e7f\u6cdb\u8ba4\u77e5\u3002\u4f46\u662f\uff0c\u4ecePrisma\u7684\u7248\u672c2\u5f00\u59cb\uff08\u4e0b\u6587\u4e2d\u5c06\u7b80\u79f0\u4e3aPrisma\uff09\uff0c\u5b83\u5c06\u4e13\u6ce8\u4e8eORM\u90e8\u5206\uff0c\u5e76\u671d\u7740\u4e0eGraphQL\u65e0\u76f4\u63a5\u5173\u7cfb\u7684\u65b9\u5411\u53d1\u5c55\u3002<\/p>\n

\u7136\u800c\uff0cPrisma\u6e90\u81eaGraphQL\uff0c\u5728\u5f88\u591a\u65b9\u9762\u5177\u6709\u9ad8\u5ea6\u517c\u5bb9\u6027\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u60f3\u4ecb\u7ecd\u4e0eGraphQL\u5bc6\u5207\u76f8\u5173\u7684\u529f\u80fd\u3002<\/p>\n

\u9996\u5148\uff0c\u201cPrisma\u201d\u662f\u4ec0\u4e48\uff1f\u4e0e\u4e4b\u524d\u76f8\u6bd4\u6709\u4ec0\u4e48\u4e0d\u540c\u4e4b\u5904\uff1f\u5982\u679c\u5bf9\u6b64\u611f\u5174\u8da3\uff0c\u4f60\u53ef\u4ee5\u53c2\u8003\u4e4b\u524d\u53d1\u5e03\u7684\u8d44\u6599\u3002<\/p>\n

\u5728\u672c\u6587\u6240\u8ff0\u6642\uff0cPrisma\u7684\u7248\u672c\u5982\u4e0b\uff1a
\n– 2.13.0<\/p>\n

\u6570\u636e\u52a0\u8f7d\u5668<\/h1>\n

\u5728\u7ecf\u5e38\u88ab\u63d0\u53ca\u7684GraphQL\u95ee\u9898\u4e4b\u4e00\u662f\u5728\u6570\u636e\u5e93\u8bbf\u95ee\u4e2d\u5bb9\u6613\u53d1\u751fN+1\u95ee\u9898\u3002<\/p>\n

\u8fd9\u662f\u7531\u4e8eGraphQL\u67e5\u8be2\u662f\u4e00\u4e2a\u6811\u72b6\u7ed3\u6784\uff0c\u9700\u8981\u9012\u5f52\u6267\u884c\u4e0e\u6bcf\u4e2a\u5143\u7d20\u76f8\u5bf9\u5e94\u7684\u89e3\u6790\u5668\uff0c\u7136\u540e\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n

\u5047\u8bbe\u6709\u5982\u4e0b\u6240\u8ff0\u7684\u5177\u4f53Schema\u5b9a\u4e49\u3002<\/p>\n

type<\/span> Query<\/span> {<\/span>\r\n  users<\/span>:<\/span> [<\/span>User<\/span>]!<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> User<\/span> {<\/span>\r\n  email<\/span>:<\/span> String<\/span>!<\/span>\r\n  id<\/span>:<\/span> Int<\/span>!<\/span>\r\n  name<\/span>:<\/span> String<\/span>\r\n  Posts<\/span>:<\/span> [<\/span>Post<\/span>!]!<\/span>\r\n  Profile<\/span>:<\/span> Profile<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Post<\/span> {<\/span>\r\n  body<\/span>:<\/span> String<\/span>!<\/span>\r\n  id<\/span>:<\/span> Int<\/span>!<\/span>\r\n  published<\/span>:<\/span> Boolean<\/span>!<\/span>\r\n  title<\/span>:<\/span> String<\/span>!<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Profile<\/span> {<\/span>\r\n  bio<\/span>:<\/span> String<\/span>!<\/span>\r\n  id<\/span>:<\/span> Int<\/span>!<\/span>\r\n  User<\/span>:<\/span> User<\/span>!<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7528\u6237\u7684Resolver\u5b9e\u73b0\u5982\u4e0b\u3002<\/p>\n
export<\/span> const<\/span> User<\/span> =<\/span> objectType<\/span>({<\/span>\r\n  name<\/span>:<\/span> '<\/span>User<\/span>'<\/span>,<\/span>\r\n  definition<\/span>(<\/span>t<\/span>)<\/span> {<\/span>\r\n    t<\/span>.<\/span>nonNull<\/span>.<\/span>int<\/span>(<\/span>'<\/span>id<\/span>'<\/span>),<\/span>\r\n    t<\/span>.<\/span>string<\/span>(<\/span>'<\/span>email<\/span>'<\/span>),<\/span>\r\n    t<\/span>.<\/span>string<\/span>(<\/span>'<\/span>name<\/span>'<\/span>),<\/span>\r\n    t<\/span>.<\/span>nonNull<\/span>.<\/span>list<\/span>.<\/span>field<\/span>(<\/span>'<\/span>posts<\/span>'<\/span>,<\/span> {<\/span>\r\n      type<\/span>:<\/span> '<\/span>Post<\/span>'<\/span>,<\/span>\r\n      resolve<\/span>(<\/span>root<\/span>,<\/span> _args<\/span>,<\/span> ctx<\/span>)<\/span> {<\/span>\r\n        return<\/span> ctx<\/span>.<\/span>prisma<\/span>.<\/span>user<\/span>.<\/span>findUnique<\/span>({<\/span> where<\/span>:<\/span> {<\/span> id<\/span>:<\/span> root<\/span>.<\/span>id<\/span>}}).<\/span>Posts<\/span>()<\/span>\r\n      }<\/span>\r\n    })<\/span>\r\n    t<\/span>.<\/span>field<\/span>(<\/span>'<\/span>profile<\/span>'<\/span>,<\/span> {<\/span>\r\n      type<\/span>:<\/span> '<\/span>Profile<\/span>'<\/span>,<\/span>\r\n      resolve<\/span>:<\/span> (<\/span>root<\/span>,<\/span> _<\/span>,<\/span> ctx<\/span>)<\/span> =><\/span> {<\/span>\r\n        return<\/span> ctx<\/span>.<\/span>prisma<\/span>.<\/span>user<\/span>.<\/span>findUnique<\/span>({<\/span> where<\/span>:<\/span> {<\/span> id<\/span>:<\/span> root<\/span>.<\/span>id<\/span> }}).<\/span>Profile<\/span>()<\/span>\r\n      }<\/span>\r\n    })<\/span>\r\n  }<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
\u5bfe\u8fd9\u4e2a\u5b9e\u73b0\u7684\u76f4\u89c2\u7406\u89e3\u662f\uff0c\u5728\u6267\u884c\u4ee5\u4e0b\u7684GraphQL\u65f6\uff0c\u4f3c\u4e4e\u4f1a\u6267\u884c\u83b7\u53d6\u7528\u6237\u6570\u7684Post\u548cProfile\u7684\u5904\u7406\u3002<\/p>\n
{<\/span>\r\n  users<\/span> {<\/span>\r\n    id<\/span>\r\n    Posts<\/span> {<\/span>\r\n      id<\/span>\r\n      title<\/span>\r\n      published<\/span>\r\n    }<\/span>\r\n    Profile<\/span> {<\/span>\r\n      bio<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7136\u800c\uff0c\u5f53\u6211\u67e5\u770bPrisma\u5b9e\u9645\u6267\u884c\u7684SQL\u65e5\u5fd7\u65f6\uff0c\u53d1\u73b0\u53d1\u51fa\u7684SQL\u5171\u6709\u4ee5\u4e0b5\u4e2a\u3002<\/p>\n
1<\/span>.<\/span> SELECT<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span>.<\/span>\"id\"<\/span>,<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span>.<\/span>\"email\"<\/span>,<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span>.<\/span>\"name\"<\/span> FROM<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span> WHERE<\/span> 1<\/span>=<\/span>1<\/span> OFFSET<\/span> $<\/span>1<\/span>\r\n2<\/span>.<\/span> SELECT<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span>.<\/span>\"id\"<\/span> FROM<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span> WHERE<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span>.<\/span>\"id\"<\/span> IN<\/span> (<\/span>$<\/span>1<\/span>,<\/span>$<\/span>2<\/span>,<\/span>$<\/span>3<\/span>)<\/span> OFFSET<\/span> $<\/span>4<\/span>\r\n3<\/span>.<\/span> SELECT<\/span> \"public\"<\/span>.<\/span>\"Post\"<\/span>.<\/span>\"id\"<\/span>,<\/span> \"public\"<\/span>.<\/span>\"Post\"<\/span>.<\/span>\"title\"<\/span>,<\/span> \"public\"<\/span>.<\/span>\"Post\"<\/span>.<\/span>\"body\"<\/span>,<\/span> \"public\"<\/span>.<\/span>\"Post\"<\/span>.<\/span>\"published\"<\/span>,<\/span> \"public\"<\/span>.<\/span>\"Post\"<\/span>.<\/span>\"userId\"<\/span> FROM<\/span> \"public\"<\/span>.<\/span>\"Post\"<\/span> WHERE<\/span> \"public\"<\/span>.<\/span>\"Post\"<\/span>.<\/span>\"userId\"<\/span> IN<\/span> (<\/span>$<\/span>1<\/span>,<\/span>$<\/span>2<\/span>,<\/span>$<\/span>3<\/span>)<\/span> OFFSET<\/span> $<\/span>4<\/span>\r\n4<\/span>.<\/span> SELECT<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span>.<\/span>\"id\"<\/span> FROM<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span> WHERE<\/span> \"public\"<\/span>.<\/span>\"User\"<\/span>.<\/span>\"id\"<\/span> IN<\/span> (<\/span>$<\/span>1<\/span>,<\/span>$<\/span>2<\/span>,<\/span>$<\/span>3<\/span>)<\/span> OFFSET<\/span> $<\/span>4<\/span>\r\n5<\/span>.<\/span> SELECT<\/span> \"public\"<\/span>.<\/span>\"Profile\"<\/span>.<\/span>\"id\"<\/span>,<\/span> \"public\"<\/span>.<\/span>\"Profile\"<\/span>.<\/span>\"bio\"<\/span>,<\/span> \"public\"<\/span>.<\/span>\"Profile\"<\/span>.<\/span>\"userId\"<\/span> FROM<\/span> \"public\"<\/span>.<\/span>\"Profile\"<\/span> WHERE<\/span> \"public\"<\/span>.<\/span>\"Profile\"<\/span>.<\/span>\"userId\"<\/span> IN<\/span> (<\/span>$<\/span>1<\/span>,<\/span>$<\/span>2<\/span>,<\/span>$<\/span>3<\/span>)<\/span> OFFSET<\/span> $<\/span>4<\/span>\r\n<\/code><\/pre>\n
\u56e0\u4e3aPrisma\u5df2\u7ecf\u652f\u6301dataloader\u7684\u4f18\u5316\u3002<\/p>\n
\u5728\u4f7f\u7528Rails\u7b49\u6846\u67b6\u5b9e\u73b0REST API\u65f6\uff0c\u6211\u8ba4\u4e3a\u4f7f\u7528Eager Loading\uff08\u9884\u52a0\u8f7d\uff09\u662f\u5e38\u89c1\u7684\u7528\u4e8e\u907f\u514dN+1\u95ee\u9898\u7684\u65b9\u6cd5\u3002
\n\u7136\u800c\uff0c\u5728GraphQL\u4e2d\uff0c\u6b63\u5982\u524d\u9762\u63d0\u5230\u7684\uff0c\u7531\u4e8eResolver\u4f1a\u9012\u5f52\u8c03\u7528\u5176\u4ed6Resolver\uff0c\u56e0\u6b64\u5728\u9884\u52a0\u8f7d\u65f6\u5f88\u96be\u8fdb\u884c\u4f18\u5316\u3002
\n\u56e0\u6b64\uff0c\u5728GraphQL\u4e2d\uff0c\u5ef6\u8fdf\u52a0\u8f7d\uff08Lazy Loading\uff09\u662f\u907f\u514dN+1\u95ee\u9898\u7684\u5e38\u7528\u65b9\u6cd5\u3002
\ndataloader\u662f\u4e00\u4e2a\u5b9e\u73b0\u5ef6\u8fdf\u52a0\u8f7d\u7684\u6a21\u5757\uff0c\u6700\u521d\u662fFacebook\u5728GraphQL\u53d1\u5e03\u65f6\u4f5c\u4e3a\u53c2\u8003\u5b9e\u73b0\u516c\u5f00\u7684\u5e93\u3002
\nhttps:\/\/github.com\/graphql\/dataloader<\/p>\n
\u4ece\u90a3\u91cc\u5f00\u59cb\uff0c\u5e7f\u6cdb\u4f7f\u7528\u7684\u63d0\u4f9b\u60f0\u6027\u52a0\u8f7d\u7684\u6a21\u5757\u901a\u5e38\u88ab\u79f0\u4e3adataloader\u3002<\/p>\n
\u5728Prisma Client\u7684\u5b9e\u73b0\u4e2d\uff0c\u4e0d\u662f\u5728\u6307\u4ee4Query\u88ab\u89e6\u53d1\u7684\u77ac\u95f4\u7acb\u5373\u6267\u884cQuery\uff0c\u800c\u662f\u5c06\u5176\u4fdd\u5b58\u5728\u5185\u5b58\u4e2d\u7684\u7f13\u5b58\u4e2d\uff0c\u76f4\u5230node\u7684nextTick\u56de\u8c03\u88ab\u89e6\u53d1\u3002
\n\u5f53nextTick\u88ab\u89e6\u53d1\u65f6\uff0c\u8bf7\u6c42\u4f1a\u4e00\u6b21\u6027\u53d1\u9001\u5230Prisma Engine\uff08\u7528Rust\u5b9e\u73b0\u7684\u67e5\u8be2\u5f15\u64ce\uff09\u3002
\n\u4e00\u6b21\u6027\u53d1\u9001\u7684\u67e5\u8be2\u4f1a\u5728Prisma Engine\u4e0a\u88ab\u4f18\u5316\u4e3aSQL\uff0c\u5e76\u5c06\u5176\u6267\u884c\u7ed3\u679c\u8fd4\u56de\u7ed9Node\uff08Prisma Client\uff09\u3002<\/p>\n
\u5b9e\u9645\u4e0a\u67e5\u770b\u4e00\u4e0bSQL\uff0c\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0\u4e0a\u8ff0\u76845\u4e2a\u67e5\u8be2\u5305\u542b\u4ee5\u4e0b\u6b65\u9aa4\u3002<\/p>\n
    \n
  1. \n
      \u83b7\u53d6\u7528\u6237\u5217\u8868<\/ol>\n<\/li>\n<\/ol>\n
       <\/p>\n
        \n
      1. \n
          \u68c0\u67e5\u7528\u6237ID\u662f\u5426\u5b58\u5728\uff08\uff1f\uff09* \u5bf9\u4e8e\u8fd9\u4e2a\u67e5\u8be2\u7684\u5fc5\u8981\u6027\u4e00\u5f00\u59cb\u5e76\u4e0d\u660e\u663e\u3002\u6211\u60f3\u5728\u6709\u65f6\u95f4\u7684\u65f6\u5019\u518d\u53bb\u5b9e\u73b0\u5b83\u3002<\/ol>\n<\/li>\n<\/ol>\n
           <\/p>\n
            \n
          1. \n
              \u83b7\u53d6\u4e0e\u7528\u6237\u76f8\u5173\u7684\u5e16\u5b50<\/ol>\n<\/li>\n<\/ol>\n
               <\/p>\n
                \n
              1. \n
                  \u4e0e\u7b2c2\u70b9\u76f8\u540c<\/ol>\n<\/li>\n<\/ol>\n
                   <\/p>\n
                    \u83b7\u53d6\u4e0e\u7528\u6237\u76f8\u5173\u7684\u4e2a\u4eba\u8d44\u6599<\/ol>\n
                    \u5728\u6bcf\u4e2a\u67e5\u8be2\u4e2d\uff0c\u7531\u4e8e\u6d4b\u8bd5\u65f6\u51c6\u5907\u4e863\u6761\u7528\u6237\u6570\u636e\uff0c\u56e0\u6b64WHERE “public”.”Post”.”userId” IN ($1,$2,$3)\u7684\u6761\u4ef6\u4f1a\u51fa\u73b0\u3002<\/p>\n
                    \u6839\u636e\u6240\u89c1\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff0c\u67e5\u8be2\u6b21\u6570\u4e0d\u662f\u6839\u636e\u4e8b\u52a1\u6570\u91cf\u589e\u52a0\uff0c\u800c\u662f\u6839\u636eResolver\u7684\u6570\u91cf\u589e\u52a0\u3002<\/p>\n
                    \u60a8\u53ef\u4ee5\u4ece\u4ee5\u4e0b\u94fe\u63a5\u4e2d\u67e5\u770b\u5b9e\u9645\u7684\u5b9e\u65bd\u60c5\u51b5\u3002<\/p>\n
                      \n
                    • \n
                        Prisma Client: https:\/\/github.com\/prisma\/prisma\/blob\/2.13.0\/src\/packages\/client\/src\/runtime\/Dataloader.ts#L22<\/ul>\n<\/li>\n<\/ul>\n
                         <\/p>\n
                          Prisma Engine: https:\/\/github.com\/prisma\/prisma-engines\/blob\/2.14.0-dev.13\/query-engine\/core\/src\/query_document\/mod.rs#L56<\/ul>\n
                          \u53ef\u4ee5\u5229\u7528 Eager Loading \u8fdb\u884c\u4f18\u5316\uff0c\u5728\u5b9e\u73b0\u65f6\u4e5f\u53ef\u4ee5\u4f7f\u7528 include field\u3002<\/p>\n
                          const<\/span> result<\/span> =<\/span> await<\/span> prisma<\/span>.<\/span>user<\/span>.<\/span>findUnique<\/span>({<\/span>\r\n  where<\/span>:<\/span> {<\/span> id<\/span>:<\/span> 1<\/span> },<\/span>\r\n  include<\/span>:<\/span> {<\/span> posts<\/span>:<\/span> true<\/span> },<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
                          \u8fd9\u4e2a\u67e5\u8be2\u4e2d\uff0c\u6211\u4eec\u83b7\u53d6\u4e86\u7528\u6237\u7684\u5217\u8868\uff0c\u5305\u62ec\u5e16\u5b50\u7684\u5217\u8868\u3002<\/p>\n
                          \u5d4c\u5957\u5199\u5165\/\u8bfb\u53d6<\/h1>\n
                          \u8fd9\u4e2a\u4e0e\u4e4b\u524d\u63d0\u5230\u7684include\u7c7b\u4f3c\uff0cPrisma\u7684\u8bb8\u591aAPI\u90fd\u53ef\u4ee5\u5bf9\u5d4c\u5957\u5bf9\u8c61\u8fdb\u884c\u6279\u91cf\u64cd\u4f5c\u3002<\/p>\n
                          const<\/span> user<\/span> =<\/span> await<\/span> prisma<\/span>.<\/span>user<\/span>.<\/span>create<\/span>({<\/span>\r\n  data<\/span>:<\/span> {<\/span>\r\n    email<\/span>:<\/span> '<\/span>alice@prisma.io<\/span>'<\/span>,<\/span>\r\n    profile<\/span>:<\/span> {<\/span>\r\n      create<\/span>:<\/span> {<\/span> bio<\/span>:<\/span> '<\/span>Hello World<\/span>'<\/span> },<\/span>\r\n    },<\/span>\r\n  },<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
                          \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5728\u521b\u5efa\u7528\u6237\u7684\u540c\u65f6\u4e5f\u521b\u5efa\u4e86\u4e2a\u4eba\u8d44\u6599\u3002
                          \n\u8fd9\u4e2aAPI\u4e0eGraphQL\u7684\u4e00\u4e2a\u4f18\u70b9\u975e\u5e38\u76f8\u914d\uff0c\u5c31\u662f\u80fd\u591f\u901a\u8fc7\u6574\u5408\u67e5\u8be2\u6765\u51cf\u5c11\u8bf7\u6c42\u6b21\u6570\u3002<\/p>\n
                          \u8bfb\u53d6\u4e3a\u4ee5\u4e0b\u5185\u5bb9<\/p>\n
                          \r\nconst<\/span> users<\/span> =<\/span> await<\/span> prisma<\/span>.<\/span>user<\/span>.<\/span>findMany<\/span>({<\/span>\r\n  include<\/span>:<\/span> {<\/span>\r\n    posts<\/span>:<\/span> {<\/span>\r\n      include<\/span>:<\/span> {<\/span>\r\n        categories<\/span>:<\/span> {<\/span>\r\n          include<\/span>:<\/span> {<\/span>\r\n            posts<\/span>:<\/span> true<\/span>,<\/span>\r\n          },<\/span>\r\n        },<\/span>\r\n      },<\/span>\r\n    },<\/span>\r\n  },<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
                          \u57fa\u4e8e\u5149\u6807\u7684\u5206\u9875<\/h1>\n
                          \u5728GraphQL\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528\u88ab\u79f0\u4e3a\u6e38\u6807\u5206\u9875\uff08Cursor-based\uff09\u7684\u65b9\u5f0f\u3002<\/p>\n
                          \u5e76\u4e0d\u662f\u8bf4\u5b83\u6bd4Offset\u66f4\u4f18\u79c0\uff0c\u800c\u662f\u9002\u7528\u7684\u5730\u65b9\u4e0d\u540c\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u5b83\u9002\u7528\u4e8e\u7c7b\u4f3c\u65e0\u9650\u6eda\u52a8\u7684\u5b9e\u73b0\u65b9\u5f0f\uff0c\u53ef\u4ee5\u4ece\u4e0a\u6b21\u83b7\u53d6\u7684\u7ed3\u679c\u4e2d\u83b7\u53d6\u6700\u65b0\u7684\u5dee\u5f02\u3002
                          \n\u76f8\u53cd\uff0c\u5b83\u4e0d\u9002\u7528\u4e8e\u50cfGoogle\u641c\u7d22\u7ed3\u679c\u90a3\u6837\u6839\u636e\u9875\u6570\u8fdb\u884c\u83b7\u53d6\u3002
                          \n\u6211\u8ba4\u4e3a\u8fd9\u4e9b\u65b9\u9762\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u7075\u6d3b\u4f7f\u7528\u3002<\/p>\n
                          \u9019\u662f\u5f9eGraphQL\u516c\u958b\u521d\u671f\u958b\u59cb\uff0cRelay\u5c31\u88ab\u63a1\u7528\u70ba\u6700\u4f73\u5be6\u8e10\u4e26\u5be6\u65bd\uff0c\u4e26\u9010\u6f38\u666e\u53ca\u958b\u4f86\u3002\u53ef\u4ee5\u53c3\u8003https:\/\/relay.dev\/graphql\/connections.htm\u3002<\/p>\n
                          \u5728\u57fa\u4e8e\u6e38\u6807\u7684\u5206\u9875\u4e2d\uff0c\u901a\u5e38\u9700\u8981\u4f7f\u7528first\u548cafter\u4f5c\u4e3a\u53c2\u6570\u3002
                          \nfirst\u7528\u4e8e\u83b7\u53d6\u6570\u91cf\uff0cafter\u7528\u4e8e\u6307\u5b9a\u4e00\u4e2a\u79f0\u4e3a\u6e38\u6807\u7684\u5b57\u7b26\u4e32\uff0c\u8be5\u5b57\u7b26\u4e32\u5728\u4e0a\u4e00\u6b21\u7ed3\u679c\u4e2d\u4e3a\u6bcf\u4e2a\u5143\u7d20\u5206\u914d\u4e86\u4e00\u4e2a\u552f\u4e00\u7684\u6807\u8bc6\u7b26\uff0c\u5e76\u4e14\u7ed3\u679c\u5c06\u8fd4\u56deafter\u4e4b\u540e\u7684\u5185\u5bb9\u3002<\/p>\n
                          \u5982\u679c\u6307\u5b9a friends(first:2 after:”5″)\uff0c\u7ed3\u679c\u5c06\u4ece”5″\u540e\u5f00\u59cb\u5e76\u8fd4\u56de2\u9879\u3002<\/p>\n
                          \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6e38\u6807\u5e76\u4e0d\u4ec5\u9650\u4e8eID\uff0c\u6839\u636e\u6761\u4ef6\u53ef\u80fd\u8fd8\u5305\u542b\u504f\u79fb\/\u9650\u5236\u7684\u4fe1\u606f\u3002
                          \n\u7531\u4e8e\u683c\u5f0f\u53d6\u51b3\u4e8e\u8981\u6c42\u800c\u5bb9\u6613\u53d8\u5316\uff0cGraphQL\u5b98\u65b9\u5efa\u8bae\u5728\u5305\u542b\u5fc5\u8981\u4fe1\u606f\u540e\u901a\u8fc7base64\u7f16\u7801\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\u3002
                          \nhttps:\/\/graphql.org\/learn\/pagination\/#pagination-and-edges<\/p>\n
                          \u7531\u4e8e\u6839\u636e\u4e0a\u8ff0\u8981\u6c42\uff0c\u9700\u8981\u8003\u8651\u5b9e\u73b0\u6e38\u6807\u529f\u80fd\uff0c\u6240\u4ee5\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\uff0c\u4f46Prisma\u4f5c\u4e3a\u5b98\u65b9API\u63d0\u4f9b\u4e86\u7b80\u5355\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n
                          \r\nconst<\/span> secondQuery<\/span> =<\/span> prisma<\/span>.<\/span>post<\/span>.<\/span>findMany<\/span>({<\/span>\r\n  take<\/span>:<\/span> 4<\/span>,<\/span>\r\n  cursor<\/span>:<\/span> {<\/span>\r\n    id<\/span>:<\/span> myCursor<\/span>,<\/span>\r\n  },<\/span>\r\n  where<\/span>:<\/span> {<\/span>\r\n    title<\/span>:<\/span> {<\/span>\r\n      contains<\/span>:<\/span> '<\/span>Prisma<\/span>'<\/span> \/* Optional filter *\/<\/span>,<\/span>\r\n    },<\/span>\r\n  },<\/span>\r\n  orderBy<\/span>:<\/span> {<\/span>\r\n    id<\/span>:<\/span> '<\/span>asc<\/span>'<\/span>,<\/span>\r\n  },<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
                          \u8981\u8fd0\u884c\u8fd9\u4e2a\uff0c\u6709\u4ee5\u4e0b\u9650\u5236\uff1a
                          \n– \u7ed3\u679c\u5217\u8868\u5fc5\u987b\u7ecf\u8fc7Cursor\u6392\u5e8f\uff0c\u800c\u4e14Cursor\u5fc5\u987b\u662f\u552f\u4e00\u7684\u4e14\u8fde\u7eed\u7684\u3002
                          \n– \u65e0\u6cd5\u6307\u5b9a\u9875\u6570\u8fdb\u884c\u83b7\u53d6\u3002<\/p>\n
                          \u6211\u8ba4\u4e3a\u5b83\u53ef\u80fd\u4e0d\u80fd\u9002\u5e94\u5404\u79cd\u7528\u4f8b\uff0c\u56e0\u4e3a\u5b83\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5b9e\u65bd\uff0c\u4f46\u5bf9\u4e8e\u7b80\u5355\u7684\u7528\u4f8b\u6765\u8bf4\uff0c\u5b83\u5728ORM\u4e2d\u7684\u5b9e\u65bd\u7ed9\u4eba\u4e00\u79cd\u5b89\u5fc3\u611f\u3002<\/p>\n
                          Nexus \u5185\u514b\u82cf\u65af<\/h1>\n
                          \u6709\u4e00\u4e2a\u540d\u4e3aNexus\u7684\u7528\u4e8e\u5b9e\u73b0GraphQL\u89e3\u6790\u5668\u7684\u6846\u67b6\u3002
                          \n\u76ee\u524d\u4e0ePrisma\u6ca1\u6709\u76f4\u63a5\u7684\u5173\u7cfb\uff0c\u4f46\u5b83\u6700\u521d\u662fPrisma\u7ec4\u7ec7\u7684\u5b50\u9879\u76ee\uff0c\u81f3\u4eca\u4ecd\u6709\u6765\u81eaPrisma\u5f00\u53d1\u8005\u7684\u8d21\u732e\uff0c\u5e76\u4e14\u6709Prisma\u96c6\u6210\u7684\u6587\u6863\u3001\u5e93\u7b49\u652f\u6301\uff0c\u4f7f\u7528Prisma\u53ef\u4ee5\u66f4\u52a0\u9ad8\u6548\u3002<\/p>\n
                          Nexus\u7684\u76ee\u6807\u662f\u65b9\u4fbf\u5730\u5b9e\u73b0Type-safe\u7684GraphQL\u670d\u52a1\u5668\uff0c\u5e76\u63d0\u4f9b\u529f\u80fd\u4ee5\u63d0\u9ad8\u5f00\u53d1\u73af\u5883\u7684\u81ea\u52a8\u751f\u6210\u7c7b\u578b\u7b49\u65b9\u9762\u3002<\/p>\n
                          \u6211\u8ba4\u4e3a\u5b9e\u9645\u4e0a\u7684\u6a21\u5f0f\u5b9a\u4e49\u548cResolver\u7684\u5b9e\u73b0\u9075\u5faa\u4e86graphql-js\uff0c\u6240\u4ee5\u5982\u679c\u4f60\u6709\u63a5\u89e6\u8fc7\u5b83\u7684\u4eba\uff0c\u53ef\u80fd\u4f1a\u66f4\u5bb9\u6613\u4e0a\u624b\u3002<\/p>\n
                          \u4f7f\u7528nexus\u7684Prisma\u63d2\u4ef6(nexus-plugin-prisma)\uff0c\u5728\u4e00\u4e9b\u7b80\u5355\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u907f\u514d\u5728Resolver\u4e2d\u7f16\u5199\u5b9e\u73b0\uff0c\u76f4\u63a5\u5c06model\u7684\u503c\u66b4\u9732\u51fa\u6765\u3002<\/p>\n
                          export<\/span> const<\/span> User<\/span> =<\/span> objectType<\/span>({<\/span>\r\n  name<\/span>:<\/span> '<\/span>User<\/span>'<\/span>,<\/span>\r\n  definition<\/span>(<\/span>t<\/span>)<\/span> {<\/span>\r\n    t<\/span>.<\/span>model<\/span>.<\/span>id<\/span>(),<\/span>      \/\/ ID field\u3092\u516c\u958b<\/span>\r\n    \/\/...<\/span>\r\n    t<\/span>.<\/span>model<\/span>.<\/span>Profile<\/span>(),<\/span> \/\/ \u4ee5\u4e0b\u3068\u540c\u69d8<\/span>\r\n    \/\/ t.field('profile', {<\/span>\r\n    \/\/   type: 'Profile',<\/span>\r\n    \/\/   resolve: (root, _, ctx) => {<\/span>\r\n    \/\/     return ctx.prisma.user.findUnique({ where: { id: root.id }}).Profile()<\/span>\r\n    \/\/   }<\/span>\r\n    \/\/ })<\/span>\r\n  }<\/span>\r\n})<\/span>\r\n<\/code><\/pre>\n
                          \u5c3d\u7ba1\u6211\u81ea\u5df1\u5c1a\u672a\u5b8c\u5168\u4f7f\u7528\u8fc7\uff0c\u4f46\u4e2a\u4eba\u800c\u8a00\uff0c\u6211\u89c9\u5f97Nexus\u4f53\u9a8c\u4e0d\u9519\u3002
                          \n\u5982\u679c\u60a8\u6b63\u5728\u8003\u8651\u4f7f\u7528Prisma\uff0c\u4e5f\u53ef\u4ee5\u8003\u8651\u4e00\u4e0bNexus\uff0c\u53ef\u80fd\u4e5f\u4f1a\u4e0d\u9519\u7684\u3002<\/p>\n
                          \u603b\u4e4b<\/h1>\n
                          Prisma\u662f\u4e00\u4e2a\u4e13\u6ce8\u4e8eORM\u90e8\u5206\u7684\u5de5\u5177\uff0c\u4e0eGraphQL\u6ca1\u6709\u76f4\u63a5\u5173\u7cfb\u3002\u4f46\u5728\u5176\u4e2d\uff0c\u6211\u5c06\u4ecb\u7ecd\u4e00\u4e9b\u6211\u8ba4\u4e3a\u9002\u5408\u5b9e\u73b0GraphQL\u7684\u90e8\u5206\u3002\u5982\u679c\u60a8\u611f\u5174\u8da3\uff0c\u8bf7\u4e0d\u8981\u72b9\u8c6b\uff0c\u5c3d\u5feb\u53bb\u8bd5\u8bd5\u770b\u5427\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                          \u8fd9\u7bc7\u6587\u7ae0\u662fGraphQL Advent Calendar 2020\u7684\u7b2c\u5341\u7bc7\u6587\u7ae0\u3002 \u4e0a\u4e00\u7bc7\u6587\u7ae0\u662f\u7531@mtsmfm […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47890","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u4e0eGraphQL\u517c\u5bb9\u7684ORM Prisma - 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\/\u4e0egraphql\u517c\u5bb9\u7684orm-prisma\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u4e0eGraphQL\u517c\u5bb9\u7684ORM Prisma\" \/>\n<meta property=\"og:description\" content=\"\u8fd9\u7bc7\u6587\u7ae0\u662fGraphQL Advent Calendar 2020\u7684\u7b2c\u5341\u7bc7\u6587\u7ae0\u3002 \u4e0a\u4e00\u7bc7\u6587\u7ae0\u662f\u7531@mtsmfm […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u4e0egraphql\u517c\u5bb9\u7684orm-prisma\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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