{"id":48191,"date":"2023-07-19T16:06:15","date_gmt":"2023-05-05T02:37:51","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8nestjs%e4%b8%ad%e5%ae%9e%e7%8e%b0graphql%e5%88%86%e9%a1%b5\/"},"modified":"2024-04-30T14:20:41","modified_gmt":"2024-04-30T06:20:41","slug":"%e5%9c%a8nestjs%e4%b8%ad%e5%ae%9e%e7%8e%b0graphql%e5%88%86%e9%a1%b5","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8nestjs%e4%b8%ad%e5%ae%9e%e7%8e%b0graphql%e5%88%86%e9%a1%b5\/","title":{"rendered":"\u5728NestJS\u4e2d\u5b9e\u73b0GraphQL\u5206\u9875"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u6211\u662fCADDi\u7684\u540e\u7aef\u5de5\u7a0b\u5e08\u72ed\u95f4\u3002
\n\u8fd9\u7bc7\u6587\u7ae0\u662fCADDi Advent Calendar\u7684\u7b2c18\u5929\u7684\u6587\u7ae0\u3002\u6628\u5929\u662f\u7531@wolf_cpp\u5148\u751f\u4ecb\u7ecd\u7684\u4f7f\u7528Valgrind\u8fdb\u884c\u4ee3\u7801\u5206\u6790\uff01<\/p>\n

CADDi\u5728\u591a\u4e2a\u7cfb\u7edf\u4e2d\u4f7f\u7528\u4e86GraphQL\u4f5c\u4e3aBFF\uff0c\u5e76\u4e14\u6211\u8d1f\u8d23\u7684\u7cfb\u7edf\u4e5f\u4f7f\u7528\u4e86GraphQL\u3002\u524d\u6bb5\u65f6\u95f4\u6211\u5b9e\u65bd\u4e86\u5206\u9875\u529f\u80fd\uff0c\u4f46\u6211\u60f3\u5bf9\u5176\u8fdb\u884c\u6539\u8fdb\uff0c\u8fd9\u6b21\u6211\u60f3\u5199\u4e00\u4e0b\u5173\u4e8e\u8fd9\u4e2a\u6539\u8fdb\u7684\u5185\u5bb9\u3002\u6211\u8d1f\u8d23\u7684\u7cfb\u7edf\u4f7f\u7528\u4e86NestJS\uff0c\u5e0c\u671b\u80fd\u591f\u4ecb\u7ecd\u4f7f\u7528NestJS\u7684\u5b9e\u73b0\u793a\u4f8b\u3002<\/p>\n

\u4f7f\u7528GraphQL\u8fdb\u884c\u5206\u9875\u64cd\u4f5c<\/h1>\n

\u636eGraphQL\u5b98\u65b9\u6587\u6863\u4e2d\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u63a8\u8350\u4f7f\u7528\u7c7bRelay\u6837\u5f0f\u7684\u6e38\u6807\u5206\u9875\u6216Relay\u6837\u5f0f\u5206\u9875\u3002\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u4e30\u5bcc\u7684\u529f\u80fd\uff0c\u6839\u636e\u4f7f\u7528\u60c5\u51b5\u53ef\u80fd\u4f1a\u611f\u89c9\u8fc7\u4e8e\u7e41\u7410\uff0c\u4f46\u8003\u8651\u5230\u53ef\u6269\u5c55\u6027\uff0c\u6211\u4eec\u51b3\u5b9a\u6309\u7167\u6b64\u65b9\u6cd5\u8fdb\u884c\u5b9e\u73b0\u3002
\n\u636e\u8bf4Apollo Client 3.0\u63d0\u4f9b\u4e86\u9488\u5bf9Relay\u6837\u5f0f\u6e38\u6807\u5206\u9875\u7684\u7f13\u5b58\u529f\u80fd\u3002
\n@gushernobindsme\u5148\u751f\u5c06\u5728\u660e\u5929\u7684\u6587\u7ae0\u4e2d\u5bf9\u6b64\u8fdb\u884c\u89e3\u91ca\uff0c\u8bf7\u4e00\u5b9a\u8981\u9605\u8bfb\u3002<\/p>\n

\u4f7f\u7528NestJS\u8fdb\u884c\u5b9e\u73b0<\/h1>\n

\u5c3d\u7ba1NestJS\u7684\u5b98\u65b9\u6587\u6863\u4e2d\u6709\u5173\u4e8e\u5206\u9875\u7684\u793a\u4f8b\uff08\u4f8b\u5982Resolver\u793a\u4f8b\u548cModel\u793a\u4f8b\uff09\uff0c\u4f46\u53ea\u6709\u90e8\u5206\u5185\u5bb9\u88ab\u63d0\u53ca\uff0c\u56e0\u6b64\u5e0c\u671b\u80fd\u591f\u5bf9\u6b64\u8fdb\u884c\u89e3\u91ca\u3002
\n\u7531\u4e8e\u5728NestJS\u4e2d\u6709\u4e00\u4e2a\u5408\u9002\u7684\u6837\u4f8b\uff0c\u6211\u4eec\u5c06\u5bf9\u5176\u8fdb\u884c\u6269\u5c55\u3002
\n\u5728NestJS\u4e2d\uff0c\u53ef\u4ee5\u9884\u5148\u5b9a\u4e49GraphQL\u6a21\u5f0f\uff0c\u7136\u540e\u901a\u8fc7\u8be5\u6a21\u5f0f\u751f\u6210\u4ee3\u7801\uff0c\u4e5f\u53ef\u4ee5\u4ece\u4ee3\u7801\u751f\u6210\u6a21\u5f0f\uff0c\u800c\u672c\u6b21\u5c06\u4f7f\u7528\u540e\u8005\u7684\u65b9\u6cd5\u3002<\/p>\n

Pagination\u7684\u6a21\u578b\u5b9a\u4e49<\/h2>\n

\u5728\u5b9e\u73b0Pagination\u4e4b\u524d\uff0c\u9996\u5148\u53c2\u8003\u8fd9\u4e2a\u6765\u51c6\u5907Pagination\u7684\u5b9a\u4e49\u3002<\/p>\n

import<\/span> {<\/span> ObjectType<\/span> }<\/span> from<\/span> \"<\/span>@nestjs\/graphql<\/span>\"<\/span>;<\/span>\r\n\r\n@<\/span>ObjectType<\/span>(<\/span>\"<\/span>PageInfo<\/span>\"<\/span>)<\/span>\r\nexport<\/span> class<\/span> PageInfo<\/span> {<\/span>\r\n  startCursor<\/span>:<\/span> string<\/span>;<\/span>\r\n  endCursor<\/span>:<\/span> string<\/span>;<\/span>\r\n  hasNextPage<\/span>:<\/span> boolean<\/span>;<\/span>\r\n  hasPreviousPage<\/span>:<\/span> boolean<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
import<\/span> {<\/span> Field<\/span>,<\/span> ObjectType<\/span>,<\/span> Int<\/span> }<\/span> from<\/span> \"<\/span>@nestjs\/graphql<\/span>\"<\/span>;<\/span>\r\nimport<\/span> {<\/span> Type<\/span> }<\/span> from<\/span> \"<\/span>@nestjs\/common<\/span>\"<\/span>;<\/span>\r\nimport<\/span> {<\/span> PageInfo<\/span> }<\/span> from<\/span> \"<\/span>.\/page-info.model<\/span>\"<\/span>;<\/span>\r\n\r\nexport<\/span> function<\/span> PaginatedConnection<\/span><<\/span>T<\/span>><\/span>(<\/span>classRef<\/span>:<\/span> Type<\/span><<\/span>T<\/span>><\/span>):<\/span> any<\/span> {<\/span>\r\n  @<\/span>ObjectType<\/span>({<\/span> isAbstract<\/span>:<\/span> true<\/span> })<\/span>\r\n  class<\/span> AbstractConnectionType<\/span> {<\/span>\r\n    @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> Int<\/span>)<\/span>\r\n    totalCount<\/span>:<\/span> number<\/span>;<\/span>\r\n\r\n    @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> [<\/span>AbstractEdgeType<\/span>],<\/span> {<\/span> nullable<\/span>:<\/span> true<\/span> })<\/span>\r\n    edges<\/span>:<\/span> AbstractEdgeType<\/span>[];<\/span>\r\n\r\n    @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> PageInfo<\/span>)<\/span>\r\n    pageInfo<\/span>:<\/span> PageInfo<\/span>;<\/span>\r\n  }<\/span>\r\n\r\n  @<\/span>ObjectType<\/span>(<\/span>`<\/span>${<\/span>classRef<\/span>.<\/span>name<\/span>}<\/span>Edge`<\/span>)<\/span>\r\n  abstract<\/span> class<\/span> AbstractEdgeType<\/span> {<\/span>\r\n    @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> String<\/span>)<\/span>\r\n    cursor<\/span>:<\/span> string<\/span>;<\/span>\r\n\r\n    @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> classRef<\/span>)<\/span>\r\n    node<\/span>:<\/span> T<\/span>;<\/span>\r\n  }<\/span>\r\n  return<\/span> AbstractConnectionType<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5173\u4e8epage-info.model.ts\uff0c\u6211\u8ba4\u4e3a\u5b83\u662f\u4e00\u4e2a\u666e\u901a\u7684\u7c7b\uff0c\u6240\u4ee5\u4e0d\u9700\u8981\u89e3\u91ca\u3002
\n\u95ee\u9898\u53ef\u80fd\u51fa\u5728pagnated-connection.model.ts\u3002
\n\u5728PaginatedConnection\u4e2d\u6709\u4e00\u4e9b\u52a8\u6001\u751f\u6210\u7c7b\u7684\u5904\u7406\u3002\uff08\u867d\u7136\u5728\u8fd9\u91cc\u8fd4\u56deany\u7c7b\u578b\u6709\u70b9\u5fae\u5999\uff0c\u4f46\u65e0\u6cd5\u89e3\u51b3\u2026\u2026\uff09<\/p>\n
\u5e94\u7528\u5206\u9875\u6a21\u578b<\/h2>\n
\u8981\u5c06\u5176\u5e94\u7528\u4e8e\u5b9e\u9645\u6a21\u578b\uff0c\u8bf7\u6309\u4ee5\u4e0b\u65b9\u5f0f\u64cd\u4f5c\u3002<\/p>\n
import<\/span> {<\/span> Recipe<\/span> }<\/span> from<\/span> \"<\/span>.\/recipe.model<\/span>\"<\/span>;<\/span>\r\n\r\nimport<\/span> {<\/span> ObjectType<\/span> }<\/span> from<\/span> \"<\/span>@nestjs\/graphql<\/span>\"<\/span>;<\/span>\r\nimport<\/span> {<\/span> PaginatedConnection<\/span> }<\/span> from<\/span> \"<\/span>src\/common\/pagination\/model\/pagnated-connection.model<\/span>\"<\/span>;<\/span>\r\n\r\n@<\/span>ObjectType<\/span>()<\/span>\r\nexport<\/span> class<\/span> PaginatedRecipe<\/span> extends<\/span> PaginatedConnection<\/span>(<\/span>Recipe<\/span>)<\/span> {}<\/span>\r\n<\/code><\/pre>\n
\u7531\u4e4b\u524d\u4ecb\u7ecd\u7684PaginatedConnection\u52a8\u6001\u751f\u6210\u7c7b\uff0c\u5e76\u7ee7\u627f\u5b83\u3002\u6240\u4ee5\u4ece\u6982\u5ff5\u4e0a\u6765\u8bf4\uff0c\u5e94\u8be5\u662f\u4ee5\u4e0b\u7684\u5f62\u5f0f\u3002<\/p>\n
class<\/span> PaginatedRecipe<\/span> {<\/span>\r\n  @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> Int<\/span>)<\/span>\r\n  totalCount<\/span>:<\/span> number<\/span>;<\/span>\r\n\r\n  @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> [<\/span>AbstractEdgeType<\/span>],<\/span> {<\/span> nullable<\/span>:<\/span> true<\/span> })<\/span>\r\n  edges<\/span>:<\/span> AbstractEdgeType<\/span>[];<\/span>\r\n\r\n  @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> PageInfo<\/span>)<\/span>\r\n  pageInfo<\/span>:<\/span> PageInfo<\/span>;<\/span>\r\n\r\n  @<\/span>ObjectType<\/span>(<\/span>\"<\/span>RecipeEdge<\/span>\"<\/span>)<\/span>\r\n  class<\/span> AbstractEdgeType<\/span> {<\/span>\r\n    @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> String<\/span>)<\/span>\r\n    cursor<\/span>:<\/span> string<\/span>;<\/span>\r\n\r\n    @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> Recipe<\/span>)<\/span>\r\n    node<\/span>:<\/span> Recipe<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53ea\u9700\u5c06\u6b64\u8fd4\u56de\u7ed9\u89e3\u6790\u5668\uff0c\u5c31\u5b8c\u6210\u4e86\u3002<\/p>\n
@<\/span>Resolver<\/span>((<\/span>of<\/span>)<\/span> =><\/span> Recipe<\/span>)<\/span>\r\nexport<\/span> class<\/span> RecipesResolver<\/span> {<\/span>\r\n  constructor<\/span>(<\/span>private<\/span> readonly<\/span> recipesService<\/span>:<\/span> RecipesService<\/span>)<\/span> {}<\/span>\r\n\r\n  \/\/ @Query(returns => [Recipe])<\/span>\r\n  \/\/ recipes(@Args() recipesArgs: RecipesArgs): Promise<Recipe[]> {<\/span>\r\n  \/\/  return this.recipesService.findAll(recipesArgs);<\/span>\r\n  \/\/ }<\/span>\r\n\r\n\u3000<\/span>\/\/ \u5143\u306e\u30af\u30a8\u30ea\u3092Pagination\u3057\u305f\u3082\u306e\u306b\u7f6e\u304d\u63db\u3048<\/span>\r\n  @<\/span>Query<\/span>((<\/span>returns<\/span>)<\/span> =><\/span> PaginatedRecipe<\/span>)<\/span>\r\n  recipes<\/span>(@<\/span>Args<\/span>()<\/span> args<\/span>:<\/span> PaginationRecipesArgs<\/span>):<\/span> Promise<\/span><<\/span>PaginatedRecipe<\/span>><\/span> {<\/span>\r\n    return<\/span> this<\/span>.<\/span>recipesService<\/span>.<\/span>findAll<\/span>(<\/span>args<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53c2\u6570\u5df2\u8fdb\u884c\u5982\u4e0b\u8bbe\u5b9a\u3002<\/p>\n
import<\/span> {<\/span> ArgsType<\/span>,<\/span> Field<\/span>,<\/span> Int<\/span> }<\/span> from<\/span> \"<\/span>@nestjs\/graphql<\/span>\"<\/span>;<\/span>\r\n\r\n@<\/span>ArgsType<\/span>()<\/span>\r\nexport<\/span> class<\/span> PaginationArgs<\/span> {<\/span>\r\n  @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> Int<\/span>)<\/span>\r\n  first<\/span>?:<\/span> number<\/span>;<\/span>\r\n\r\n  @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> Int<\/span>)<\/span>\r\n  after<\/span>?:<\/span> number<\/span>;<\/span>\r\n\r\n  @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> String<\/span>)<\/span>\r\n  last<\/span>?:<\/span> string<\/span>;<\/span>\r\n\r\n  @<\/span>Field<\/span>((<\/span>type<\/span>)<\/span> =><\/span> String<\/span>)<\/span>\r\n  before<\/span>?:<\/span> string<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
import<\/span> {<\/span> ArgsType<\/span>,<\/span> Field<\/span> }<\/span> from<\/span> '<\/span>@nestjs\/graphql<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> PaginationArgs<\/span> }<\/span> from<\/span> '<\/span>src\/common\/pagination\/dto\/pagination.args<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>ArgsType<\/span>()<\/span>\r\nexport<\/span> class<\/span> PaginationRecipesArgs<\/span> extends<\/span> PaginationArgs<\/span>{<\/span>\r\n  @<\/span>Field<\/span>(<\/span>type<\/span> =><\/span> String<\/span>)<\/span>\r\n  title<\/span>?:<\/span> string<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5f53\u6211\u5728Playground\u4e0a\u68c0\u67e5\u542f\u52a8\u7ed3\u679c\u65f6\uff0c\u6211\u786e\u8ba4\u5b83\u5df2\u7ecf\u7b26\u5408\u9884\u671f\u7684\u6a21\u5f0f\u5b9a\u4e49\u3002<\/p>\n
\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n
\u603b\u7ed3<\/h1>\n
\u6211\u80fd\u53c2\u8003NestJS\u6837\u672c\u5c06\u5206\u9875\u5b9a\u4e49\u5171\u901a\u5316\u3002\u53ea\u662f\u7c7b\u5b9a\u4e49\u4e2d\u6b8b\u7559\u4e86\u4e00\u4e9b\u201cany\u201d\u7684\u4e1c\u897f\uff0c\u6240\u4ee5\u5982\u679c\u80fd\u518d\u7a0d\u5fae\u4f18\u5316\u4e00\u4e0b\u90a3\u4e00\u90e8\u5206\u5c31\u597d\u4e86\u3002\u4e0d\u8fc7\u53ea\u53d7\u5230\u4e86\u89e3\u6790\u5668\u7684\u5f71\u54cd\uff0c\u6240\u4ee5\u6211\u89c9\u5f97\u53ef\u4ee5\u901a\u8fc7\u5de7\u5999\u5730\u8bbe\u8ba1\u4e0e\u670d\u52a1\u7aef\u7684\u63a5\u53e3\u6765\u51cf\u5c11\u5f71\u54cd\u3002\u4e0b\u6b21\u6211\u5e0c\u671b\u80fd\u5199\u51fa\u76f8\u5173\u5185\u5bb9\u3002<\/p>\n
\u660e\u5929\u7684\u6d3b\u52a8\u662f @gushernobindsme \u5148\u751f\u7684\u300c\u5728Apollo Client 3.0\u4e0b\u5f00\u59cb\u6109\u5feb\u7684\u7f13\u5b58\u751f\u6d3b\u300d\u3002\u656c\u8bf7\u671f\u5f85\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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