{"id":47556,"date":"2023-07-13T04:56:35","date_gmt":"2024-01-17T20:44:40","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90graphql%e3%80%91%e4%bd%bf%e7%94%a8apolloserver-v4%e5%92%8cprisma%e5%ae%9e%e7%8e%b0subscription%e6%97%b6%ef%bc%8c%e8%8e%b7%e5%8f%96%e7%9b%b8%e5%85%b3%e6%95%b0%e6%8d%ae%e7%9a%84%e6%96%b9\/"},"modified":"2024-04-30T13:19:02","modified_gmt":"2024-04-30T05:19:02","slug":"%e3%80%90graphql%e3%80%91%e4%bd%bf%e7%94%a8apolloserver-v4%e5%92%8cprisma%e5%ae%9e%e7%8e%b0subscription%e6%97%b6%ef%bc%8c%e8%8e%b7%e5%8f%96%e7%9b%b8%e5%85%b3%e6%95%b0%e6%8d%ae%e7%9a%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90graphql%e3%80%91%e4%bd%bf%e7%94%a8apolloserver-v4%e5%92%8cprisma%e5%ae%9e%e7%8e%b0subscription%e6%97%b6%ef%bc%8c%e8%8e%b7%e5%8f%96%e7%9b%b8%e5%85%b3%e6%95%b0%e6%8d%ae%e7%9a%84%e6%96%b9\/","title":{"rendered":"\u3010GraphQL\u3011\u4f7f\u7528ApolloServer v4\u548cPrisma\u5b9e\u73b0Subscription\u65f6\uff0c\u83b7\u53d6\u76f8\u5173\u6570\u636e\u7684\u65b9\u6cd5"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u8fd9\u6b21\u6211\u4eec\u5c06\u901a\u8fc7GraphQL\u548cApollo Server v4\u5b9e\u73b0\u5728\u6570\u636e\u5e93\u4e2d\u5efa\u7acb\u5173\u7cfb\u7684\u6570\u636e\u7684\u5b9e\u65f6\u83b7\u53d6\u65b9\u6cd5\uff08Subscription\uff09\u3002<\/p>\n

\u524d\u63d0 (qian2 ti2)<\/h1>\n

\u5982\u679c\u4e0d\u4e86\u89e3Subscription\u7684\u4eba\uff0c\u8bf7\u53c2\u8003\u5b98\u65b9\u6216\u4ee5\u4e0b\u7684\u6587\u7ae0\u3002<\/p>\n

Apollo Server allows you to implement subscriptions using ApolloServer v4.<\/p><\/blockquote>\n

\u5b9e\u65bd<\/h1>\n

\u6211\u4eec\u5c06\u5b9e\u73b0\u4e00\u9879\u529f\u80fd\uff0c\u5373\u5bf9\u5e16\u5b50\u8fdb\u884c\u6295\u7968\uff08\u7c7b\u4f3c\u4e8e\u70b9\u8d5e\u529f\u80fd\uff09\u3002<\/p>\n

\u6a21\u5f0f\u5b9a\u4e49<\/h2>\n

\u4f5c\u4e3a\u6ce8\u610f\u4e8b\u9879\uff0c\u672c\u6b21\u5c06\u4ee5\u6311\u9009\u76f8\u5173\u90e8\u5206\u800c\u975e\u6574\u4e2a\u4ee3\u7801\u7684\u5f62\u5f0f\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n

Prisma\u7684\u6a21\u5f0f<\/div>\n
model<\/span> Link<\/span> {<\/span>\r\n  id<\/span>          Int<\/span>      @id<\/span> @default<\/span>(<\/span>autoincrement<\/span>())<\/span>\r\n  createdAt<\/span>   DateTime<\/span> @default<\/span>(<\/span>now<\/span>())<\/span>\r\n  description<\/span> String<\/span>\r\n  url<\/span>         String<\/span>\r\n  user<\/span>        User<\/span>     @relation<\/span>(<\/span>fields:<\/span> [<\/span>userId<\/span>]<\/span>,<\/span> references:<\/span> [<\/span>id<\/span>]<\/span>,<\/span> onDelete:<\/span> Cascade<\/span>)<\/span>\r\n  userId<\/span>      Int<\/span>\r\n  votes<\/span>       Vote<\/span>[]<\/span>\r\n}<\/span>\r\n\r\nmodel<\/span> User<\/span> {<\/span>\r\n  id<\/span>       Int<\/span>    @id<\/span> @default<\/span>(<\/span>autoincrement<\/span>())<\/span>\r\n  name<\/span>     String<\/span>\r\n  email<\/span>    String<\/span> @unique<\/span>\r\n  password<\/span> String<\/span>\r\n  links<\/span>    Link<\/span>[]<\/span>\r\n  votes<\/span>    Vote<\/span>[]<\/span>\r\n}<\/span>\r\n\r\nmodel<\/span> Vote<\/span> {<\/span>\r\n  id<\/span>     Int<\/span>  @id<\/span> @default<\/span>(<\/span>autoincrement<\/span>())<\/span>\r\n  link<\/span>   Link<\/span> @relation<\/span>(<\/span>fields:<\/span> [<\/span>linkId<\/span>]<\/span>,<\/span> references:<\/span> [<\/span>id<\/span>]<\/span>,<\/span> onDelete:<\/span> Cascade<\/span>)<\/span>\r\n  linkId<\/span> Int<\/span>\r\n  user<\/span>   User<\/span> @relation<\/span>(<\/span>fields:<\/span> [<\/span>userId<\/span>]<\/span>,<\/span> references:<\/span> [<\/span>id<\/span>]<\/span>,<\/span> onDelete:<\/span> Cascade<\/span>)<\/span>\r\n  userId<\/span> Int<\/span>\r\n\r\n  @@unique<\/span>([<\/span>linkId,<\/span> userId<\/span>])<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4ee5\u4e0a\u662f\u6570\u636e\u5e93\u7684\u6a21\u5f0f\uff08\u8868\uff09\u5b9a\u4e49\u3002\u6295\u7968\u7531Vote\u6a21\u578b\u8fdb\u884c\u7ba1\u7406\u3002\u8be5\u6a21\u578b\u5177\u6709User\u548cLink\u6a21\u578b\u4f5c\u4e3a\u5176\u7236\u6a21\u578b\uff0c\u56e0\u6b64\u5efa\u7acb\u4e86\u76f8\u5e94\u7684\u5173\u7cfb\u3002<\/p>\n
GraphQL\u6a21\u5f0f\uff08\u8bfb\u4f5cgurafuku-ru mo-xing\uff09<\/div>\n
type<\/span> Mutation<\/span> {<\/span>\r\n  vote<\/span>(<\/span>linkId<\/span>:<\/span> ID<\/span>!):<\/span> Vote<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Subscription<\/span> {<\/span>\r\n  newVote<\/span>:<\/span> NewVote<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Link<\/span> {<\/span>\r\n  id<\/span>:<\/span> ID<\/span>!<\/span>\r\n  description<\/span>:<\/span> String<\/span>!<\/span>\r\n  url<\/span>:<\/span> String<\/span>!<\/span>\r\n  user<\/span>:<\/span> User<\/span>!<\/span>\r\n  votes<\/span>:<\/span> [<\/span>Vote<\/span>!]!<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> User<\/span> {<\/span>\r\n  id<\/span>:<\/span> ID<\/span>!<\/span>\r\n  name<\/span>:<\/span> String<\/span>!<\/span>\r\n  email<\/span>:<\/span> String<\/span>!<\/span>\r\n  links<\/span>:<\/span> [<\/span>Link<\/span>!]!<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Vote<\/span> {<\/span>\r\n  id<\/span>:<\/span> ID<\/span>!<\/span>\r\n  link<\/span>:<\/span> Link<\/span>!<\/span>\r\n  user<\/span>:<\/span> User<\/span>!<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> NewVote<\/span> {<\/span>\r\n  id<\/span>:<\/span> ID<\/span>\r\n  link<\/span>:<\/span> Link<\/span>\r\n  user<\/span>:<\/span> User<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728GraphQL\u7684\u67b6\u6784\u4e2d\uff0c\u6211\u4eec\u540c\u6837\u5bf9\u8868\u683c\u8fdb\u884c\u5173\u8054\u914d\u7f6e\u3002<\/p>\n
\u6211\u60f3\u505a\u7684\u4e8b\u60c5\u5982\u4e0b\u6240\u8ff0\u3002<\/p>\n
    \n
  • \n
      \u6295\u7968\u3092\u3059\u308b\u3068Vote\u30c6\u30fc\u30d6\u30eb\u306b\u30c7\u30fc\u30bf\u304c\u683c\u7d0d\u3055\u308c\u308b<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \u6295\u7968\u3057\u305f\u3089\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u6295\u7968\u6642\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b<\/ul>\n
        \u56e0\u6b64\uff0c\u6211\u4eec\u5728Mutation\u4e2d\u6307\u5b9a\u4e86\u6295\u7968\u7684Mutation\uff0c\u5e76\u5728Subscription\u4e2d\u6307\u5b9a\u4e86\u8981\u83b7\u53d6\u7684\u6295\u7968\u6570\u636e\u3002<\/p>\n
        \u5bf9\u4e8e\u90a3\u4e9b\u8ba4\u4e3a\u5728”Subscription\u7684newVote”\u4e2d\u5e94\u8be5\u6307\u5b9aVote\u7c7b\u578b\u7684\u4eba\uff0c\u6211\u5728\u8fd9\u91cc\u89e3\u91ca\u4e00\u4e0b\u3002 \u5982\u679c\u5c06Subscription\u7684\u7c7b\u578b\u8bbe\u7f6e\u4e3aVote\uff0c\u90a3\u4e48\u53ea\u80fd\u83b7\u53d6\u5230Vote\u7684id\uff0c\u800c\u5982\u679c\u5c1d\u8bd5\u83b7\u53d6\u76f8\u5173\u7684User\u6216Link\uff0c\u5219\u4f1a\u8fd4\u56denull\u5e76\u62a5\u9519\u3002\uff08\u6211\u5df2\u7ecf\u5b9e\u9645\u6d4b\u8bd5\u8fc7\u4e86\uff09<\/p>\n
        \u56e0\u6b64\uff0c\u8fd9\u6709\u70b9\u9ebb\u70e6\uff0c\u6211\u5728NewVote\u4e2d\u8fdb\u884c\u4e86\u7c7b\u578b\u5b9a\u4e49\u3002
        \n\u7531\u4e8e\u8fd9\u79cd\u7c7b\u578b\u5b9a\u4e49\u5f88\u5bb9\u6613\u88ab\u5ffd\u7565\uff0c\u6240\u4ee5\u8981\u6ce8\u610f\u3002<\/p>\n
        \u5b9a\u5236\u53d8\u5f02
        \n(Custom Mutation)<\/h2>\n
        \u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u5b9e\u73b0\u7528\u4e8e\u68c0\u7d22\u5efa\u7acb\u4e86\u5173\u7cfb\u7684\u6570\u636e\u7684\u5904\u7406\u3002
        \n\u4f8b\u5982\uff0c\u68c0\u7d22\u4e0e\u94fe\u63a5\u5173\u8054\u7684\u7528\u6237\u7b49\u64cd\u4f5c\u3002<\/p>\n
        \u7528\u6237\u53d8\u5f02<\/div>\n
        import<\/span> type<\/span> {<\/span> Context<\/span> }<\/span> from<\/span> '<\/span>@\/types\/Context<\/span>'<\/span>\r\n\r\nexport<\/span> const<\/span> links<\/span> =<\/span> (<\/span>parent<\/span>:<\/span> {<\/span> id<\/span>:<\/span> number<\/span> },<\/span> __<\/span>:<\/span> unknown<\/span>,<\/span> context<\/span>:<\/span> Context<\/span>)<\/span> =><\/span>\r\n  context<\/span>.<\/span>prisma<\/span>.<\/span>user<\/span>\r\n    .<\/span>findUnique<\/span>({<\/span>\r\n      where<\/span>:<\/span> {<\/span> id<\/span>:<\/span> parent<\/span>.<\/span>id<\/span> },<\/span>\r\n    })<\/span>\r\n    .<\/span>links<\/span>()<\/span>\r\n<\/code><\/pre>\n
        \u901a\u8fc7\u6570\u7ec4\u83b7\u53d6\u4e0e\u7528\u6237\u5173\u8054\u7684\u94fe\u63a5\u3002
        \n“parent”\u4ee3\u8868\u7236\u7ea7\u7684\u610f\u601d\uff0c\u6240\u4ee5\u5b83\u6307\u7684\u662f\u7236\u7ea7\u8868\u7684ID\uff0c\u4e5f\u5c31\u662fLinks\u8868\u7684\u7236\u7ea7\u8868ID\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8981\u6839\u636eUser\u8868\u7684ID\u8fdb\u884c\u641c\u7d22\uff08\u867d\u7136\u6709\u4e9b\u590d\u6742\uff0c\u4f46\u5c31\u662f\u8fd9\u4e2a\u610f\u601d\uff09\u3002<\/p>\n
        \u4ece\u6570\u636e\u5e93\u6a21\u5f0f\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u53ef\u4ee5\u5c06\u5176\u5bf9\u5e94\u5230\u201c\u7528\u6237\u201d\u7684\u201c\u94fe\u63a5\u201d\u5c5e\u6027\u4e0a\u3002<\/p>\n
        type<\/span> User<\/span> {<\/span>\r\n  id<\/span>:<\/span> ID<\/span>!<\/span>\r\n  name<\/span>:<\/span> String<\/span>!<\/span>\r\n  email<\/span>:<\/span> String<\/span>!<\/span>\r\n  links<\/span>:<\/span> [<\/span>Link<\/span>!]!<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u94fe\u63a5\u7a81\u53d8<\/div>\n
        import<\/span> type<\/span> {<\/span> Context<\/span> }<\/span> from<\/span> '<\/span>@\/types\/Context<\/span>'<\/span>\r\n\r\nexport<\/span> const<\/span> user<\/span> =<\/span> (<\/span>parent<\/span>:<\/span> {<\/span> id<\/span>:<\/span> number<\/span> },<\/span> __<\/span>:<\/span> unknown<\/span>,<\/span> context<\/span>:<\/span> Context<\/span>)<\/span> =><\/span> {<\/span>\r\n  return<\/span> context<\/span>.<\/span>prisma<\/span>.<\/span>link<\/span>\r\n    .<\/span>findUnique<\/span>({<\/span>\r\n      where<\/span>:<\/span> {<\/span> id<\/span>:<\/span> parent<\/span>.<\/span>id<\/span> },<\/span>\r\n    })<\/span>\r\n    .<\/span>user<\/span>()<\/span>\r\n}<\/span>\r\n\r\nexport<\/span> const<\/span> votes<\/span> =<\/span> (<\/span>parent<\/span>:<\/span> {<\/span> id<\/span>:<\/span> number<\/span> },<\/span> __<\/span>:<\/span> unknown<\/span>,<\/span> context<\/span>:<\/span> Context<\/span>)<\/span> =><\/span>\r\n  context<\/span>.<\/span>prisma<\/span>.<\/span>link<\/span>\r\n    .<\/span>findUnique<\/span>({<\/span>\r\n      where<\/span>:<\/span> {<\/span> id<\/span>:<\/span> parent<\/span>.<\/span>id<\/span> },<\/span>\r\n    })<\/span>\r\n    .<\/span>votes<\/span>()<\/span>\r\n\r\n<\/code><\/pre>\n
        \u6211\u4eec\u4e5f\u901a\u8fc7Links\u63d0\u4f9b\u4e86\u7c7b\u4f3c\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u83b7\u53d6\u76f8\u5173\u7684\u6570\u636e\u3002<\/p>\n
        \u6839\u636e\u6a21\u5f0f\u5b9a\u4e49\u6765\u8bf4\uff0cLink\u7684\u7528\u6237\u548c\u6295\u7968\u5c31\u662f\u8fd9\u4e2a\u3002<\/p>\n
        type<\/span> Link<\/span> {<\/span>\r\n  id<\/span>:<\/span> ID<\/span>!<\/span>\r\n  description<\/span>:<\/span> String<\/span>!<\/span>\r\n  url<\/span>:<\/span> String<\/span>!<\/span>\r\n  user<\/span>:<\/span> User<\/span>!<\/span>\r\n  votes<\/span>:<\/span> [<\/span>Vote<\/span>!]!<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u6295\u7968\u53d8\u5f02<\/div>\n
        import<\/span> type<\/span> {<\/span> Context<\/span> }<\/span> from<\/span> '<\/span>@\/types\/Context<\/span>'<\/span>\r\n\r\nexport<\/span> const<\/span> link<\/span> =<\/span> (<\/span>parent<\/span>:<\/span> {<\/span> id<\/span>:<\/span> number<\/span> },<\/span> __<\/span>:<\/span> unknown<\/span>,<\/span> context<\/span>:<\/span> Context<\/span>)<\/span> =><\/span>\r\n  context<\/span>.<\/span>prisma<\/span>.<\/span>vote<\/span>.<\/span>findUnique<\/span>({<\/span> where<\/span>:<\/span> {<\/span> id<\/span>:<\/span> parent<\/span>.<\/span>id<\/span> }<\/span> }).<\/span>link<\/span>()<\/span>\r\n\r\nexport<\/span> const<\/span> voteUser<\/span> =<\/span> (<\/span>\r\n  parent<\/span>:<\/span> {<\/span> id<\/span>:<\/span> number<\/span> },<\/span>\r\n  __<\/span>:<\/span> unknown<\/span>,<\/span>\r\n  context<\/span>:<\/span> Context<\/span>\r\n)<\/span> =><\/span> context<\/span>.<\/span>prisma<\/span>.<\/span>vote<\/span>.<\/span>findUnique<\/span>({<\/span> where<\/span>:<\/span> {<\/span> id<\/span>:<\/span> parent<\/span>.<\/span>id<\/span> }<\/span> }).<\/span>user<\/span>()<\/span>\r\n<\/code><\/pre>\n
        \u4e0eVote\u7c7b\u4f3c\uff0c\u8fd9\u662f\u4e00\u4e2a\u67091:N\u5173\u8054\u7684\u5b50\u8868\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528\u6bcf\u4e2a\u7236\u8868\u7684id\u6765\u83b7\u53d6\u6570\u636e\u3002<\/p>\n
        \u6839\u636e\u67b6\u6784\u5b9a\u4e49\uff0cVote\u7684link\u548cuser\u5bf9\u5e94\u4e8e\u6b64\u3002<\/p>\n
        type<\/span> Vote<\/span> {<\/span>\r\n  id<\/span>:<\/span> ID<\/span>!<\/span>\r\n  link<\/span>:<\/span> Link<\/span>!<\/span>\r\n  user<\/span>:<\/span> User<\/span>!<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u5b9e\u65bd\u6295\u7968\u529f\u80fd<\/h2>\n
        \u6211\u5011\u5c07\u958b\u59cb\u5be6\u73fe\u4ee5\u4e0b\u57fa\u56e0\u7a81\u8b8a\u548c\u8a02\u95b1\u8655\u7406\u7684\u8a73\u7d30\u6d41\u7a0b\u3002<\/p>\n
        type<\/span> Mutation<\/span> {<\/span>\r\n  vote<\/span>(<\/span>linkId<\/span>:<\/span> ID<\/span>!):<\/span> Vote<\/span>\r\n}<\/span>\r\n\r\ntype<\/span> Subscription<\/span> {<\/span>\r\n  newVote<\/span>:<\/span> NewVote<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u5904\u7406\u7ec6\u8282<\/div>\n
        export<\/span> const<\/span> vote<\/span> =<\/span> async <\/span>(<\/span>\r\n  _<\/span>:<\/span> unknown<\/span>,<\/span>\r\n  args<\/span>:<\/span> {<\/span> linkId<\/span>:<\/span> string<\/span> },<\/span>\r\n  context<\/span>:<\/span> Context<\/span>\r\n)<\/span> =><\/span> {<\/span>\r\n  const<\/span> userId<\/span> =<\/span> context<\/span>.<\/span>userId<\/span> as<\/span> number<\/span>\r\n\r\n  const<\/span> vote<\/span> =<\/span> await<\/span> context<\/span>.<\/span>prisma<\/span>.<\/span>vote<\/span>.<\/span>findUnique<\/span>({<\/span>\r\n    where<\/span>:<\/span> {<\/span>\r\n      linkId_userId<\/span>:<\/span> {<\/span>\r\n        linkId<\/span>:<\/span> Number<\/span>(<\/span>args<\/span>.<\/span>linkId<\/span>),<\/span>\r\n        userId<\/span>:<\/span> userId<\/span>,<\/span>\r\n      },<\/span>\r\n    },<\/span>\r\n  })<\/span>\r\n\r\n  if <\/span>(<\/span>vote<\/span>)<\/span> {<\/span>\r\n    throw<\/span> new<\/span> Error<\/span>(<\/span>`Link is already voted: <\/span>${<\/span>args<\/span>.<\/span>linkId<\/span>}<\/span>`<\/span>)<\/span>\r\n  }<\/span>\r\n\r\n  const<\/span> newVote<\/span> =<\/span> await<\/span> context<\/span>.<\/span>prisma<\/span>.<\/span>vote<\/span>.<\/span>create<\/span>({<\/span>\r\n    data<\/span>:<\/span> {<\/span>\r\n      user<\/span>:<\/span> {<\/span> connect<\/span>:<\/span> {<\/span> id<\/span>:<\/span> userId<\/span> }<\/span> },<\/span>\r\n      link<\/span>:<\/span> {<\/span> connect<\/span>:<\/span> {<\/span> id<\/span>:<\/span> Number<\/span>(<\/span>args<\/span>.<\/span>linkId<\/span>)<\/span> }<\/span> },<\/span>\r\n    },<\/span>\r\n    include<\/span>:<\/span> {<\/span>\r\n      link<\/span>:<\/span> true<\/span>,<\/span>\r\n      user<\/span>:<\/span> true<\/span>,<\/span>\r\n    },<\/span>\r\n  })<\/span>\r\n\r\n  context<\/span>.<\/span>pubsub<\/span>.<\/span>publish<\/span>(<\/span>'<\/span>NEW_VOTE<\/span>'<\/span>,<\/span> newVote<\/span>)<\/span>\r\n\r\n  return<\/span> newVote<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
        \u6211\u7684\u5de5\u4f5c\u5185\u5bb9\u5982\u4e0b\u3002<\/p>\n
          \n
        • \n
            context\u3088\u308auserId\u3092\u53d6\u5f97<\/ul>\n<\/li>\n<\/ul>\n
             <\/p>\n
              \n
            • \n
                \u3059\u3067\u306b\u6295\u7968\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a<\/ul>\n<\/li>\n<\/ul>\n
                 <\/p>\n
                  \n
                • \n
                    \u6295\u7968\u3059\u308b\uff08Vote\u30c6\u30fc\u30d6\u30eb\u306b\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\uff09<\/ul>\n<\/li>\n<\/ul>\n
                     <\/p>\n
                      \u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u9001\u4fe1\uff08publish\uff09\u3059\u308b<\/ul>\n
                      \u5728newVote\u4e2d\u6700\u91cd\u8981\u7684\u662finclude\u90e8\u5206\uff0c\u5c06\u5176\u8bbe\u4e3atrue\u53ef\u4ee5\u83b7\u53d6\u4e0e\u6ce8\u518c\u76f8\u5173\u7684link\u548cuser\u3002<\/p>\n
                      \u53e6\u5916\uff0c\u63d0\u5230publish\uff0c\u5b83\u63a5\u6536\u7b2c\u4e00\u4e2a\u53c2\u6570\u4f5c\u4e3a\u89e6\u53d1\u5668\u540d\u79f0\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4f5c\u4e3a\u8981\u4f20\u9012\u7684\u503c\u3002
                      \n\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u8ba2\u9605\u8005\u7aef\u6307\u5b9a\u76f8\u540c\u7684\u89e6\u53d1\u5668\u540d\u79f0\uff0c\u5c31\u53ef\u4ee5\u63a5\u6536\u5230newVote\u5e76\u5b9e\u65f6\u83b7\u53d6\u5b83\u3002<\/p>\n
                      \u5b9e\u65bd\u8ba2\u9605\u6a21\u5f0f<\/h2>\n
                      \u8fd9\u662f\u6309\u7167\u5b98\u65b9\u8981\u6c42\u8fdb\u884c\u5b9e\u73b0\u7684\u3002\u6211\u5c06\u5c55\u793a\u6574\u4e2a\u4ee3\u7801\u3002<\/p>\n
                      import<\/span> '<\/span>dotenv\/config<\/span>'<\/span>\r\n\r\nimport<\/span> {<\/span> ApolloServer<\/span> }<\/span> from<\/span> '<\/span>@apollo\/server<\/span>'<\/span>\r\nimport<\/span> {<\/span> expressMiddleware<\/span> }<\/span> from<\/span> '<\/span>@apollo\/server\/express4<\/span>'<\/span>\r\nimport<\/span> {<\/span> ApolloServerPluginDrainHttpServer<\/span> }<\/span> from<\/span> '<\/span>@apollo\/server\/plugin\/drainHttpServer<\/span>'<\/span>\r\nimport<\/span> {<\/span> GraphQLFileLoader<\/span> }<\/span> from<\/span> '<\/span>@graphql-tools\/graphql-file-loader<\/span>'<\/span>\r\nimport<\/span> {<\/span> loadSchemaSync<\/span> }<\/span> from<\/span> '<\/span>@graphql-tools\/load<\/span>'<\/span>\r\nimport<\/span> {<\/span> addResolversToSchema<\/span> }<\/span> from<\/span> '<\/span>@graphql-tools\/schema<\/span>'<\/span>\r\nimport<\/span> {<\/span> PrismaClient<\/span> }<\/span> from<\/span> '<\/span>@prisma\/client<\/span>'<\/span>\r\nimport<\/span> bodyParser<\/span> from<\/span> '<\/span>body-parser<\/span>'<\/span>\r\nimport<\/span> cors<\/span> from<\/span> '<\/span>cors<\/span>'<\/span>\r\nimport<\/span> express<\/span> from<\/span> '<\/span>express<\/span>'<\/span>\r\nimport<\/span> {<\/span> PubSub<\/span> }<\/span> from<\/span> '<\/span>graphql-subscriptions<\/span>'<\/span>\r\nimport<\/span> {<\/span> useServer<\/span> }<\/span> from<\/span> '<\/span>graphql-ws\/lib\/use\/ws<\/span>'<\/span>\r\nimport<\/span> {<\/span> createServer<\/span> }<\/span> from<\/span> '<\/span>http<\/span>'<\/span>\r\nimport<\/span> {<\/span> join<\/span> }<\/span> from<\/span> '<\/span>path<\/span>'<\/span>\r\nimport<\/span> {<\/span> WebSocketServer<\/span> }<\/span> from<\/span> '<\/span>ws<\/span>'<\/span>\r\n\r\nimport<\/span> {<\/span> user<\/span>,<\/span> votes<\/span> }<\/span> from<\/span> '<\/span>.\/resolvers\/Link<\/span>'<\/span>\r\nimport<\/span> {<\/span> vote<\/span> }<\/span> from<\/span> '<\/span>.\/resolvers\/Mutation<\/span>'<\/span>\r\nimport<\/span> {<\/span> links<\/span> }<\/span> from<\/span> '<\/span>.\/resolvers\/User<\/span>'<\/span>\r\nimport<\/span> {<\/span> link<\/span>,<\/span> voteUser<\/span> }<\/span> from<\/span> '<\/span>.\/resolvers\/Vote<\/span>'<\/span>\r\nimport<\/span> type<\/span> {<\/span> Context<\/span> }<\/span> from<\/span> '<\/span>.\/types\/Context<\/span>'<\/span>\r\nimport<\/span> type<\/span> {<\/span> NewVote<\/span> }<\/span> from<\/span> '<\/span>.\/types\/NewVote<\/span>'<\/span>\r\nimport<\/span> {<\/span> getUserId<\/span> }<\/span> from<\/span> '<\/span>.\/utils<\/span>'<\/span>\r\n\r\nconst<\/span> PORT<\/span> =<\/span> 4000<\/span>\r\nconst<\/span> pubsub<\/span> =<\/span> new<\/span> PubSub<\/span>()<\/span>\r\n\r\nconst<\/span> prisma<\/span> =<\/span> new<\/span> PrismaClient<\/span>()<\/span>\r\n\r\nconst<\/span> app<\/span> =<\/span> express<\/span>()<\/span>\r\n\r\nconst<\/span> schema<\/span> =<\/span> loadSchemaSync<\/span>(<\/span>join<\/span>(<\/span>__dirname<\/span>,<\/span> '<\/span>.\/schema.graphql<\/span>'<\/span>),<\/span> {<\/span>\r\n  loaders<\/span>:<\/span> [<\/span>new<\/span> GraphQLFileLoader<\/span>()],<\/span>\r\n})<\/span>\r\n\r\n\/\/ \u30ea\u30be\u30eb\u30d0\u30fc\u95a2\u6570<\/span>\r\nconst<\/span> resolvers<\/span> =<\/span> {<\/span>\r\n  Mutation<\/span>:<\/span> {<\/span>\r\n    vote<\/span>:<\/span> vote<\/span>,<\/span>\r\n  },<\/span>\r\n\r\n  Subscription<\/span>:<\/span> {<\/span>\r\n    newVote<\/span>:<\/span> {<\/span>\r\n      subscribe<\/span>:<\/span> ()<\/span> =><\/span> pubsub<\/span>.<\/span>asyncIterator<\/span>([<\/span>'<\/span>NEW_VOTE<\/span>'<\/span>]),<\/span>\r\n      resolve<\/span>:<\/span> (<\/span>payload<\/span>:<\/span> NewVote<\/span>)<\/span> =><\/span> payload<\/span>,<\/span>\r\n    },<\/span>\r\n  },<\/span>\r\n\r\n  Link<\/span>:<\/span> {<\/span>\r\n    user<\/span>:<\/span> user<\/span>,<\/span>\r\n    votes<\/span>:<\/span> votes<\/span>,<\/span>\r\n  },<\/span>\r\n\r\n  User<\/span>:<\/span> {<\/span>\r\n    links<\/span>:<\/span> links<\/span>,<\/span>\r\n  },<\/span>\r\n\r\n  Vote<\/span>:<\/span> {<\/span>\r\n    link<\/span>:<\/span> link<\/span>,<\/span>\r\n    user<\/span>:<\/span> voteUser<\/span>,<\/span>\r\n  },<\/span>\r\n}<\/span>\r\n\r\nconst<\/span> schemaWithResolvers<\/span> =<\/span> addResolversToSchema<\/span>({<\/span> schema<\/span>,<\/span> resolvers<\/span> })<\/span>\r\n\r\nconst<\/span> httpServer<\/span> =<\/span> createServer<\/span>(<\/span>app<\/span>)<\/span>\r\n\r\nconst<\/span> wsServer<\/span> =<\/span> new<\/span> WebSocketServer<\/span>({<\/span>\r\n  server<\/span>:<\/span> httpServer<\/span>,<\/span>\r\n  path<\/span>:<\/span> '<\/span>\/graphql<\/span>'<\/span>,<\/span>\r\n})<\/span>\r\n\r\nconst<\/span> serverCleanup<\/span> =<\/span> useServer<\/span>({<\/span> schema<\/span>:<\/span> schemaWithResolvers<\/span> },<\/span> wsServer<\/span>)<\/span>\r\n\r\nconst<\/span> server<\/span> =<\/span> new<\/span> ApolloServer<\/span><<\/span>Context<\/span>><\/span>({<\/span>\r\n  schema<\/span>:<\/span> schemaWithResolvers<\/span>,<\/span>\r\n  plugins<\/span>:<\/span> [<\/span>\r\n    ApolloServerPluginDrainHttpServer<\/span>({<\/span> httpServer<\/span> }),<\/span>\r\n\r\n    {<\/span>\r\n      async<\/span> serverWillStart<\/span>()<\/span> {<\/span>\r\n        return<\/span> {<\/span>\r\n          async<\/span> drainServer<\/span>()<\/span> {<\/span>\r\n            await<\/span> serverCleanup<\/span>.<\/span>dispose<\/span>()<\/span>\r\n          },<\/span>\r\n        }<\/span>\r\n      },<\/span>\r\n    },<\/span>\r\n  ],<\/span>\r\n})<\/span>\r\n\r\n;(<\/span>async <\/span>()<\/span> =><\/span> {<\/span>\r\n  try<\/span> {<\/span>\r\n    await<\/span> server<\/span>.<\/span>start<\/span>()<\/span>\r\n\r\n    app<\/span>.<\/span>use<\/span>(<\/span>\r\n      '<\/span>\/graphql<\/span>'<\/span>,<\/span>\r\n      cors<\/span><<\/span>cors<\/span>.<\/span>CorsRequest<\/span>><\/span>(),<\/span>\r\n      bodyParser<\/span>.<\/span>json<\/span>(),<\/span>\r\n      expressMiddleware<\/span>(<\/span>server<\/span>,<\/span> {<\/span>\r\n        context<\/span>:<\/span> async <\/span>({<\/span> req<\/span> })<\/span> =><\/span> ({<\/span>\r\n          ...<\/span>req<\/span>,<\/span>\r\n          prisma<\/span>,<\/span>\r\n          pubsub<\/span>,<\/span>\r\n          userId<\/span>:<\/span> req<\/span> &&<\/span> req<\/span>.<\/span>headers<\/span>.<\/span>authorization<\/span> ?<\/span> getUserId<\/span>(<\/span>req<\/span>)<\/span> :<\/span> undefined<\/span>,<\/span>\r\n        }),<\/span>\r\n      })<\/span>\r\n    )<\/span>\r\n\r\n    httpServer<\/span>.<\/span>listen<\/span>(<\/span>PORT<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n      console<\/span>.<\/span>log<\/span>(<\/span>`? Query endpoint ready at http:\/\/localhost:<\/span>${<\/span>PORT<\/span>}<\/span>\/graphql`<\/span>)<\/span>\r\n      console<\/span>.<\/span>log<\/span>(<\/span>\r\n        `? Subscription endpoint ready at ws:\/\/localhost:<\/span>${<\/span>PORT<\/span>}<\/span>\/graphql`<\/span>\r\n      )<\/span>\r\n    })<\/span>\r\n  }<\/span> catch <\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>error<\/span>(<\/span>'<\/span>Error starting server: <\/span>'<\/span>,<\/span> error<\/span>)<\/span>\r\n  }<\/span>\r\n})()<\/span>\r\n<\/code><\/pre>\n
                      \u5b9a\u4e49\u5f62\u72b6<\/div>\n
                      \u4ee5\u4e0b\u662f\u76f8\u5173\u7684\u7c7b\u578b\u5b9a\u4e49\u3002<\/p>\n
                      import<\/span> type<\/span> {<\/span> Prisma<\/span>,<\/span> PrismaClient<\/span> }<\/span> from<\/span> '<\/span>@prisma\/client<\/span>'<\/span>\r\nimport<\/span> type<\/span> {<\/span> DefaultArgs<\/span> }<\/span> from<\/span> '<\/span>@prisma\/client\/runtime<\/span>'<\/span>\r\nimport<\/span> type<\/span> {<\/span> PubSub<\/span> }<\/span> from<\/span> '<\/span>graphql-subscriptions<\/span>'<\/span>\r\n\r\nexport<\/span> type<\/span> Context<\/span> =<\/span> {<\/span>\r\n  prisma<\/span>:<\/span> PrismaClient<\/span><<\/span>\r\n    Prisma<\/span>.<\/span>PrismaClientOptions<\/span>,<\/span>\r\n    never<\/span>,<\/span>\r\n    Prisma<\/span>.<\/span>RejectOnNotFound<\/span> |<\/span> Prisma<\/span>.<\/span>RejectPerOperation<\/span> |<\/span> undefined<\/span>,<\/span>\r\n    DefaultArgs<\/span>\r\n  ><\/span>\r\n  pubsub<\/span>:<\/span> PubSub<\/span>\r\n  userId<\/span>?:<\/span> string<\/span> |<\/span> number<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                      import<\/span> type<\/span> {<\/span> Link<\/span>,<\/span> User<\/span> }<\/span> from<\/span> '<\/span>@prisma\/client<\/span>'<\/span>\r\n\r\nexport<\/span> type<\/span> NewVote<\/span> =<\/span> {<\/span>\r\n  id<\/span>:<\/span> number<\/span>\r\n  link<\/span>:<\/span> Link<\/span>\r\n  user<\/span>:<\/span> User<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                      \u5173\u4e8e\u8ba2\u9605\u5b9e\u65bd\u90e8\u5206\u7684\u8bf4\u660e<\/div>\n
                      \u6211\u5c06\u5bf9\u4ee5\u4e0b\u90e8\u5206\u8fdb\u884c\u89e3\u91ca\u3002<\/p>\n
                      const<\/span> pubsub<\/span> =<\/span> new<\/span> PubSub<\/span>()<\/span>\r\n\r\n Subscription<\/span>:<\/span> {<\/span>\r\n    newVote<\/span>:<\/span> {<\/span>\r\n      subscribe<\/span>:<\/span> ()<\/span> =><\/span> pubsub<\/span>.<\/span>asyncIterator<\/span>([<\/span>'<\/span>NEW_VOTE<\/span>'<\/span>]),<\/span>\r\n      resolve<\/span>:<\/span> (<\/span>payload<\/span>:<\/span> NewVote<\/span>)<\/span> =><\/span> payload<\/span>,<\/span>\r\n    },<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
                      \u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u8fdb\u884c\u63a5\u6536\u7aef\u7684\u5b9a\u4e49\u3002
                      \n\u901a\u8fc7\u5411PubSub\u5b9e\u4f8b\u7684asyncIterator\u6307\u5b9a\u53d1\u9001\u65b9\u7684\u89e6\u53d1\u5668\u540d\u79f0\uff0c\u6211\u4eec\u5c06\u63a5\u6536\u5230\u8ba2\u9605\u6d88\u606f\u3002<\/p>\n
                      \u53ea\u8ba2\u9605\u7684\u5b9a\u4e49\u5c31\u53ef\u4ee5\u83b7\u53d6\u6295\u7968\u6570\u636e\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u65e0\u6cd5\u83b7\u53d6\u4e0e\u7528\u6237\u6216\u94fe\u63a5\u76f8\u5173\u7684\u6570\u636e\uff0c\u53ea\u80fd\u83b7\u53d6\u6295\u7968\u7684id\u3002<\/p>\n
                      \u5982\u679c\u9700\u8981\u83b7\u53d6\u5173\u8054\u7684\u6570\u636e\uff0c\u60a8\u9700\u8981\u5c06pyaload\u4f5c\u4e3aresolve\u8fd4\u56de\u3002\u901a\u8fc7\u5c06\u5176\u6307\u5b9a\u4e3aNewVote\u7c7b\u578b\uff0c\u60a8\u5c31\u53ef\u4ee5\u83b7\u53d6\u5173\u8054\u7684\u6570\u636e\u3002<\/p>\n
                      \u4ee5\u4e0a\uff0c\u5b9e\u73b0\u5df2\u7ecf\u5b8c\u6210\u3002<\/p>\n
                      \u5230\u6b64\u4e3a\u6b62<\/h1>\n
                      \u5f53\u91cd\u65b0\u56de\u987e\u8fd9\u6b21\u7684\u5b9e\u73b0\u65f6\uff0c\u6211\u610f\u8bc6\u5230\u5728GraphQL\u6a21\u5f0f\u4e2d\uff0c\u7c7b\u578b\u7684\u5b9a\u4e49\u975e\u5e38\u91cd\u8981\u3002
                      \n\u6211\u8ba4\u4e3a\u5c06\u5176\u786e\u4fdd\u4e3a\u673a\u5668\u80fd\u591f\u51c6\u786e\u8bc6\u522b\u7684\uff0c\u53ef\u4ee5\u8bf4\u662f\u4ee5\u673a\u5668\u7684\u7acb\u573a\u53bb\u7f16\u7a0b\u975e\u5e38\u91cd\u8981\u3002<\/p>\n
                      \u5982\u679c\u80fd\u5bf9\u67d0\u4eba\u6709\u6240\u5e2e\u52a9\uff0c\u6211\u5c06\u611f\u5230\u5e78\u8fd0\u3002<\/p>\n
                      \u8bf7\u63d0\u4f9b\u53c2\u8003\u6587\u732e\u3002<\/h1>\n
                      Apollo Server\u4e2d\u7684\u8ba2\u9605\u529f\u80fd
                      \n\u3010GraphQL\u3011\u4f7f\u7528Apollo Server v4\u5b9e\u73b0\u8ba2\u9605\u529f\u80fd\u7684\u65b9\u6cd5<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"
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