{"id":47624,"date":"2023-02-19T16:10:40","date_gmt":"2023-12-12T00:01:43","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e4%bd%bf%e7%94%a8graphql-ruby%e5%92%8c%e5%a4%96%e9%83%a8%e5%ba%93%e8%bf%9b%e8%a1%8c%e5%88%86%e9%a1%b5%e3%80%82\/"},"modified":"2024-04-29T15:19:18","modified_gmt":"2024-04-29T07:19:18","slug":"%e6%88%91%e6%83%b3%e4%bd%bf%e7%94%a8graphql-ruby%e5%92%8c%e5%a4%96%e9%83%a8%e5%ba%93%e8%bf%9b%e8%a1%8c%e5%88%86%e9%a1%b5%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e4%bd%bf%e7%94%a8graphql-ruby%e5%92%8c%e5%a4%96%e9%83%a8%e5%ba%93%e8%bf%9b%e8%a1%8c%e5%88%86%e9%a1%b5%e3%80%82\/","title":{"rendered":"\u6211\u60f3\u4f7f\u7528graphql-ruby\u548c\u5916\u90e8\u5e93\u8fdb\u884c\u5206\u9875"},"content":{"rendered":"<h1>The background<\/h1>\n<p>\u5927\u5bb6\u90fd\u5728\u7528GraphQL\u5417\uff1f\u6211\u4e2a\u4eba\u975e\u5e38\u559c\u6b22\u5b83\uff0c\u65e0\u8bba\u662f\u5728\u5de5\u4f5c\u4e2d\u7684\u4ea7\u54c1\u8fd8\u662f\u79c1\u4e0b\u5f00\u53d1\uff0c\u6211\u90fd\u4e3b\u8981\u4f7f\u7528Ruby on Rails\u548cgraphql-ruby\u3002GraphQL\u5728\u9047\u5230N+1\u67e5\u8be2\u7684\u65f6\u5019\u786e\u5b9e\u4f1a\u6709\u95ee\u9898\uff0c\u4f46\u5728\u4e00\u822c\u7684has_many\u5173\u7cfb\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528goldiloader\u89e3\u51b3\uff0c\u800c\u5728\u590d\u6742\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528graphql-batch\u7f16\u5199\u6279\u5904\u7406\u4ee3\u7801\u901a\u5e38\u53ef\u4ee5\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<p>\u5173\u4e8eGraphQL\u7684\u95ee\u9898\uff0c\u7531\u4e8e\u8bb8\u591a\u535a\u5ba2\u90fd\u4ecb\u7ecd\u4e86Relay\u98ce\u683c\uff08\u57fa\u4e8e\u6e38\u6807\uff09\u7684\u5206\u9875\u65b9\u5f0f\uff0c\u6240\u4ee5\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5c06\u5176\u5f15\u5165\u73b0\u6709\u7684\u57fa\u4e8e\u504f\u79fb\u7684\u5e94\u7528\u7a0b\u5e8f\u53ef\u80fd\u4f1a\u9047\u5230\u56f0\u96be\u3002\u5bf9\u6b64\uff0c\u6709\u5f88\u591a\u89e3\u51b3\u65b9\u6cd5\u88ab\u63d0\u51fa\u3002<\/p>\n<p>\u7136\u800c\uff0c\u5c31\u6211\u8fd9\u4e2a\u6848\u4f8b\u800c\u8a00\uff0c\u6211\u5df2\u7ecf\u5728\u9879\u76ee\u4e2d\u4f7f\u7528pagy\u4f5c\u4e3a\u9875\u9762\u6807\u8bb0\u7684\u5e93\u3002\u5982\u679c\u4f7f\u7528kaminari\uff0c\u53ef\u4ee5\u901a\u8fc7\u5f15\u5165\u540d\u4e3agraphql-kaminari_connection\u7684Gem\u6765\u5b9e\u73b0kaminari\u7684\u5206\u9875\u529f\u80fd\u3002\u7136\u800c\uff0cpagy\u6ca1\u6709\u8fd9\u6837\u7684Gem\uff0c\u56e0\u6b64\u4e00\u5f00\u59cb\u6211\u662f\u53c2\u8003graphql-kaminari_connection\uff0c\u5728GraphQL\u4e2d\u4f7f\u7528pagy\u8fdb\u884c\u5206\u9875\u3002\u8fd9\u4e2aGem\u975e\u5e38\u7b80\u5355\uff0c\u56e0\u6b64\u6211\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u8fdb\u884c\u6a21\u4eff\u3002\u4f46\u5f53\u65f6\u6211\u5fc5\u987b\u81ea\u5df1\u5b9a\u4e49\u53c2\u6570\u5982page\u548citems\uff0c\u5e76\u5728\u89e3\u6790\u5668\u4e2d\u7f16\u5199\u5206\u9875\u90e8\u5206\uff08\u73b0\u5728\u4e0d\u6e05\u695a\u73b0\u72b6\u5982\u4f55\uff09\u3002<\/p>\n<p>\u4e3a\u4e86\u5c3d\u53ef\u80fd\u7b80\u6d01\u5730\u4ecb\u7ecd\u5982\u4f55\u5728graphql-ruby\u4e2d\u5f15\u5165\u57fa\u4e8e\u504f\u79fb\u7684\u5206\u9875\u529f\u80fd\uff0c\u6211\u4eec\u5728\u8fd9\u91cc\u7a0d\u5fae\u6df1\u5165\u4e00\u4e9b\uff0c\u53ef\u80fd\u6709\u70b9\u4e0d\u6309\u5e38\u89c4\u8d70\uff1f\u540c\u65f6\uff0c\u5c06\u6240\u6709\u7e41\u7410\u7684\u4e8b\u60c5\u4ea4\u7ed9\u5916\u90e8\u5e93pagy\u6765\u5904\u7406\u3002<\/p>\n<h1>\u76ee\u6807<\/h1>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3aTest\uff08\u4ece\u540d\u5b57\u6765\u770b\u975e\u5e38\u968f\u610f\uff09\u7684\u6a21\u578b\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5982\u679c\u6211\u4eec\u8981\u4f7f\u7528graphql-ruby\u7f16\u5199Relay\u98ce\u683c\u7684\u89e3\u6790\u5668\uff0c\u53ef\u80fd\u6709\u5f88\u591a\u5199\u6cd5\uff0c\u4f46\u4e0b\u9762\u7684\u5b9e\u73b0\u662f\u53ef\u884c\u7684\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Types<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">Tests1Resolver<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">GraphQL<\/span><span class=\"o\">::<\/span><span class=\"no\">Schema<\/span><span class=\"o\">::<\/span><span class=\"no\">Resolver<\/span>\r\n\r\n    <span class=\"n\">type<\/span> <span class=\"no\">Test<\/span><span class=\"p\">.<\/span><span class=\"nf\">connection_type<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">resolve<\/span>\r\n      <span class=\"o\">::<\/span><span class=\"no\">Test<\/span><span class=\"p\">.<\/span><span class=\"nf\">all<\/span>\r\n    <span class=\"k\">end<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u672c\u6b21\u76ee\u6807\u662f\u4ee5\u4e0e\u4e0a\u8ff0\u5185\u5bb9\u51e0\u4e4e\u76f8\u540c\u7684\u63cf\u8ff0\uff0c\u901a\u8fc7\u5177\u4f53\u7684\u5b9e\u65bd\uff0c\u5373\u4e0eTypes::Test.connection_type\u76f8\u4f3c\u7684\u63cf\u8ff0\uff08\u672c\u6b21\u79f0\u4e3acollection_type\uff09\uff0c\u5b9e\u73b0\u5728pagy\u4e0b\u7684\u5206\u9875\u529f\u80fd\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Types<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">Tests2Resolver<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">GraphQL<\/span><span class=\"o\">::<\/span><span class=\"no\">Schema<\/span><span class=\"o\">::<\/span><span class=\"no\">Resolver<\/span>\r\n\r\n    <span class=\"n\">type<\/span> <span class=\"no\">Test<\/span><span class=\"p\">.<\/span><span class=\"nf\">collection_type<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">resolve<\/span>\r\n      <span class=\"o\">::<\/span><span class=\"no\">Test<\/span><span class=\"p\">.<\/span><span class=\"nf\">all<\/span>\r\n    <span class=\"k\">end<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<h1>\u73af\u5883 &#8211; .<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">ruby 3.0.1<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">rails 6.1.3.2<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">graphql-ruby 1.12.12<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">pagy 4.9.0<\/ul>\n<h1>\u51c6\u5907<\/h1>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5b89\u88c5graphql-ruby\u548cpagy\u6765\u8fdb\u884c\u57fa\u672c\u8bbe\u7f6e\u3002\u7531\u4e8e\u8fd9\u65b9\u9762\u5df2\u7ecf\u5728\u8bb8\u591a\u535a\u5ba2\u4e2d\u6709\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u6240\u4ee5\u6211\u5c06\u7b80\u8981\u5730\u5199\u4e00\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">gem<\/span> <span class=\"s1\">'graphql'<\/span>\r\n<span class=\"n\">gem<\/span> <span class=\"s1\">'pagy'<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>bundle\r\n<span class=\"nv\">$ <\/span>bin\/rails generate graphql:install\r\n<\/code><\/pre>\n<p>\u6211\u8ba4\u4e3a\u8fd9\u6837\u5c31\u4f1a\u5728app\/graphql\u7684\u6587\u4ef6\u5939\u4e0b\u751f\u6210GraphQL\u7684\u57fa\u672c\u6587\u4ef6\u96c6\u3002\u6211\u5e0c\u671b\u80fd\u5728\u8fd9\u4e2a\u57fa\u7840\u4e0a\u8fdb\u884c\u6dfb\u52a0\u548c\u7f16\u8f91\u5de5\u4f5c\u3002<\/p>\n<h1>\u5b9e\u65bd<\/h1>\n<p>\u6211\u5e0c\u671b\u5728graphql-ruby\u4e2d\u5b9e\u9645\u5f15\u5165pagy\u3002<\/p>\n<h2>\u5b9a\u4e49\u4e00\u4e2a\u6267\u884cpagy\u5904\u7406\u7684\u7c7b<\/h2>\n<p>\u9996\u5148\u8981\u5b9a\u4e49\u7684\u662f\u5b9e\u9645\u6267\u884cpagy\u5904\u7406\u7684\u90e8\u5206\u5b9e\u73b0\u3002\u5bf9\u4e8e\u5728\u63a7\u5236\u5668\u4e2d\u4f7f\u7528pagy\u7684\u4eba\u6765\u8bf4\uff0c\u6211\u8ba4\u4e3a\u6ca1\u6709\u4ec0\u4e48\u7279\u522b\u56f0\u96be\u7684\u5730\u65b9\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Types<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">Pagy<\/span>\r\n    <span class=\"kp\">include<\/span> <span class=\"o\">::<\/span><span class=\"no\">Pagy<\/span><span class=\"o\">::<\/span><span class=\"no\">Backend<\/span>\r\n\r\n    <span class=\"nb\">attr_reader<\/span> <span class=\"ss\">:metadata<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:collection<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">initialize<\/span> <span class=\"n\">nodes<\/span><span class=\"p\">,<\/span> <span class=\"ss\">page: <\/span><span class=\"kp\">nil<\/span><span class=\"p\">,<\/span> <span class=\"ss\">items: <\/span><span class=\"kp\">nil<\/span>\r\n      <span class=\"vi\">@metadata<\/span><span class=\"p\">,<\/span> <span class=\"vi\">@collection<\/span> <span class=\"o\">=<\/span> <span class=\"n\">paginate<\/span> <span class=\"n\">nodes<\/span><span class=\"p\">,<\/span> <span class=\"ss\">page: <\/span><span class=\"n\">page<\/span><span class=\"p\">,<\/span> <span class=\"ss\">items: <\/span><span class=\"n\">items<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"kp\">private<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">paginate<\/span> <span class=\"n\">nodes<\/span><span class=\"p\">,<\/span> <span class=\"ss\">page: <\/span><span class=\"kp\">nil<\/span><span class=\"p\">,<\/span> <span class=\"ss\">items: <\/span><span class=\"kp\">nil<\/span>\r\n      <span class=\"k\">case<\/span> <span class=\"n\">nodes<\/span>\r\n      <span class=\"k\">when<\/span> <span class=\"no\">ActiveRecord<\/span><span class=\"o\">::<\/span><span class=\"no\">Relation<\/span> <span class=\"k\">then<\/span> <span class=\"n\">pagy<\/span> <span class=\"n\">nodes<\/span><span class=\"p\">,<\/span> <span class=\"ss\">page: <\/span><span class=\"n\">page<\/span><span class=\"p\">,<\/span> <span class=\"ss\">items: <\/span><span class=\"n\">items<\/span>\r\n      <span class=\"k\">when<\/span> <span class=\"no\">Array<\/span> <span class=\"k\">then<\/span> <span class=\"n\">pagy_array<\/span> <span class=\"n\">nodes<\/span><span class=\"p\">,<\/span> <span class=\"ss\">page: <\/span><span class=\"n\">page<\/span><span class=\"p\">,<\/span> <span class=\"ss\">items: <\/span><span class=\"n\">items<\/span>\r\n      <span class=\"k\">end<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">params<\/span>\r\n      <span class=\"p\">{}<\/span>\r\n    <span class=\"k\">end<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u4e3a\u4e86\u4f7f\u7528Pagy\u7684\u6bcf\u4e2a\u65b9\u6cd5\uff0c\u8981\u50cf\u5728\u63a7\u5236\u5668\u4e2d\u5f15\u5165\u4e00\u6837\uff0c\u9700\u8981\u5305\u62ecPagy::Backend\u3002\u6b64\u5916\uff0cPagy\u4e0d\u4ec5\u4e3aActiveRecord\u63d0\u4f9b\u5206\u9875\u529f\u80fd\uff0c\u8fd8\u4e3a\u6570\u7ec4\u63d0\u4f9b\u5206\u9875\u529f\u80fd\uff0c\u56e0\u6b64\u5728case\u8bed\u53e5\u4e2d\u5224\u65ad\u662fActiveRecord::Relation\u8fd8\u662f\u6570\u7ec4\uff0c\u5e76\u8c03\u7528\u4e0d\u540c\u7684\u65b9\u6cd5\u6765\u5904\u7406\u3002<\/p>\n<p>\u6700\u540e\u63d0\u53ca\u7684\u662f\u4e00\u4e2a\u5947\u602a\u7684params\uff0c\u8fd9\u662f\u56e0\u4e3a\u5728\u63a7\u5236\u5668\u7684\u60c5\u51b5\u4e0b\uff0cpagy\u9700\u8981\u901a\u8fc7params\u8bfb\u53d6page\u548citems\uff0c\u4f46\u8fd9\u6b21\u5c06\u4eceGraphQL\u53c2\u6570\u4e2d\u63d0\u4f9b\uff0c\u56e0\u6b64\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a\u7a7a\u7684\u54c8\u5e0c\u6765\u5904\u7406\u3002<\/p>\n<h2>\u5b9a\u4e49\u4e00\u4e2a\u81ea\u52a8\u5b9a\u4e49\u53c2\u6570\u548c\u5b57\u6bb5\u7684\u7c7b\u7684\u5b9a\u4e49\u3002<\/h2>\n<p>\u901a\u8fc7\u5728graphql-ruby\u4e2d\u4f7f\u7528Relay\uff0c\u53ef\u4ee5\u4f7f\u7528Test.connection_type\u8fd9\u6837\u7684\u8fde\u63a5\u7c7b\u578b\uff0c\u5373\u4f7f\u4e0d\u7279\u522b\u6307\u5b9afirst\u6216after\u7b49\u53c2\u6570\u4e5f\u4f1a\u81ea\u52a8\u5b9a\u4e49\u3002\u540c\u6837\u5730\uff0c\u6211\u4eec\u5c06\u4f7f\u7528pagy\u4f5c\u4e3a\u8981\u4f7f\u7528\u7684\u5b57\u6bb5\uff0c\u81ea\u52a8\u5b9a\u4e49page\u548citems\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Types<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">PagyExtension<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">GraphQL<\/span><span class=\"o\">::<\/span><span class=\"no\">Schema<\/span><span class=\"o\">::<\/span><span class=\"no\">FieldExtension<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">apply<\/span>\r\n      <span class=\"n\">field<\/span><span class=\"p\">.<\/span><span class=\"nf\">argument<\/span> <span class=\"ss\">:page<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">required: <\/span><span class=\"kp\">false<\/span>\r\n      <span class=\"n\">field<\/span><span class=\"p\">.<\/span><span class=\"nf\">argument<\/span> <span class=\"ss\">:items<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">required: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">resolve<\/span> <span class=\"n\">object<\/span><span class=\"p\">:,<\/span> <span class=\"n\">arguments<\/span><span class=\"p\">:,<\/span> <span class=\"o\">**<\/span><span class=\"n\">_rest<\/span>\r\n      <span class=\"n\">args<\/span> <span class=\"o\">=<\/span> <span class=\"n\">arguments<\/span><span class=\"p\">.<\/span><span class=\"nf\">dup<\/span>\r\n      <span class=\"n\">page<\/span> <span class=\"o\">=<\/span> <span class=\"n\">args<\/span><span class=\"p\">.<\/span><span class=\"nf\">delete<\/span> <span class=\"ss\">:page<\/span>\r\n      <span class=\"n\">items<\/span> <span class=\"o\">=<\/span> <span class=\"n\">args<\/span><span class=\"p\">.<\/span><span class=\"nf\">delete<\/span> <span class=\"ss\">:items<\/span>\r\n      <span class=\"n\">obj<\/span> <span class=\"o\">=<\/span> <span class=\"k\">yield<\/span> <span class=\"n\">object<\/span><span class=\"p\">,<\/span> <span class=\"n\">args<\/span>\r\n      <span class=\"no\">Pagy<\/span><span class=\"p\">.<\/span><span class=\"nf\">new<\/span> <span class=\"n\">obj<\/span><span class=\"p\">,<\/span> <span class=\"ss\">page: <\/span><span class=\"n\">page<\/span><span class=\"p\">,<\/span> <span class=\"ss\">items: <\/span><span class=\"n\">items<\/span>\r\n    <span class=\"k\">end<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u56e0\u4e3aresolve\u51fd\u6570\u4e2d\u5b9a\u4e49\u7684\u53c2\u6570\u4f1a\u4f5c\u4e3aarguments\u4f20\u9012\uff0c\u6240\u4ee5\u6211\u4eec\u8981\u5728\u53d6\u51fapage\u548citems\u7684\u540c\u65f6\uff0c\u5c06\u5176\u4ed6\u53c2\u6570\u4f20\u9012\u7ed9\u6bcf\u4e2a\u89e3\u6790\u5668\uff0c\u5e76\u5c06\u7ed3\u679c\u4f20\u9012\u7ed9\u4e4b\u524d\u5b9a\u4e49\u7684Types::Pagy\u3002<\/p>\n<h2>\u5c06pagy\u7684\u5143\u6570\u636e\u5b9a\u4e49\u4e3aGraphQL\u5bf9\u8c61<\/h2>\n<p>\u5728graphql-ruby\u4e2d\uff0c\u5982\u679c\u4f7f\u7528\u9ed8\u8ba4\u7684Relay\uff0c\u60a8\u53ef\u4ee5\u83b7\u53d6\u5230\u50cfhasNextPage\u8fd9\u6837\u7684\u9875\u9762\u4fe1\u606f\u4f5c\u4e3apageInfo\u3002\u7c7b\u4f3c\u5730\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2aGraphQL\u5bf9\u8c61\u6765\u5b58\u50a8\u4ecepagy\u65b9\u6cd5\u8fd4\u56de\u7684\u5143\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Types<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">Metadata<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">BaseObject<\/span>\r\n\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:count<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:page<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:items<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:pages<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:last<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:offset<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:from<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:to<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:prev<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">true<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:next<\/span><span class=\"p\">,<\/span> <span class=\"no\">Integer<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">true<\/span><span class=\"p\">,<\/span> <span class=\"ss\">resolver_method: :object_next<\/span>\r\n\r\n    <span class=\"n\">delegate<\/span> <span class=\"ss\">:next<\/span><span class=\"p\">,<\/span> <span class=\"ss\">to: :object<\/span><span class=\"p\">,<\/span> <span class=\"ss\">prefix: <\/span><span class=\"kp\">true<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u5728Pagy\u4e2d\uff0c\u5b83\u4f1a\u8fd4\u56de\u5143\u6570\u636e\u4f5c\u4e3a\u8fd4\u56de\u503c\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u540d\u4e3a&#8221;next&#8221;\u7684\u5b9e\u4f8b\u53d8\u91cf\u3002\u6211\u60f3\u76f4\u63a5\u8c03\u7528\u5b83\uff0c\u4f46\u7531\u4e8e\u8fd9\u6837\u4f1a\u65e0\u6cd5\u533a\u5206\u5df2\u5b58\u5728\u7684Ruby\u4e2d\u7684&#8221;next&#8221;\uff0c\u6240\u4ee5\u5b83\u4f1a\u5728\u65e5\u5fd7\u4e2d\u663e\u793a\u4ee5\u4e0b\u8b66\u544a\u548c\u5904\u7406\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code>Metadata's `field :next` conflicts with a built-in method, use `resolver_method:` to pick a different resolver method for this field (for example, `resolver_method: :resolve_next` and `def resolve_next`). Or use `method_conflict_warning: false` to suppress this warning.\r\n<\/code><\/pre>\n<p>\u6240\u4ee5\uff0c\u6211\u5011\u4f7f\u7528resolver_method\u4f86\u66f4\u6539\u547c\u53eb\u65b9\u6cd5\u7684\u540d\u7a31\uff0c\u4e26\u4f7f\u7528delegate\u4f7f\u8a72\u65b9\u6cd5\u80fd\u76f4\u63a5\u5c0d\u61c9\u5230object\u3002<\/p>\n<h2>\u5b9a\u7fa9\u4e86\u4e00\u4e2a\u751f\u6210\u52a8\u6001\u5305\u88c5\u4e86GraphQL\u5bf9\u8c61\u7684GraphQL\u5bf9\u8c61\u7684\u7c7b\u3002<\/h2>\n<p>\u6807\u9898\u770b\u8d77\u6765\u975e\u5e38\u590d\u6742\uff0c\u4f46\u6b63\u5982\u76ee\u6807\u6240\u8ff0\uff0c\u5728graphql-ruby\u4e2d\uff0c\u901a\u8fc7\u4f7f\u7528collection_type\u6765\u9488\u5bf9GraphQL\u5bf9\u8c61\u751f\u6210\u540d\u4e3aTestConnection\u7684\u52a8\u6001\u5bf9\u8c61\u3002\u4e3a\u4e86\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\uff0c\u6211\u4eec\u5c06\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3aTestCollection\u7684\u5bf9\u8c61\u6765\u521b\u5efa\u8be5\u7c7b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Types<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">Collection<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">BaseObject<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nc\">self<\/span><span class=\"o\">.<\/span><span class=\"nf\">create<\/span> <span class=\"n\">type<\/span>\r\n      <span class=\"no\">Class<\/span><span class=\"p\">.<\/span><span class=\"nf\">new<\/span> <span class=\"nb\">self<\/span> <span class=\"k\">do<\/span>\r\n        <span class=\"n\">graphql_name<\/span> <span class=\"s2\">\"<\/span><span class=\"si\">#{<\/span><span class=\"n\">type<\/span><span class=\"p\">.<\/span><span class=\"nf\">graphql_name<\/span><span class=\"si\">}<\/span><span class=\"s2\">Collection\"<\/span>\r\n        <span class=\"n\">field<\/span> <span class=\"ss\">:collection<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"n\">type<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n        <span class=\"n\">field<\/span> <span class=\"ss\">:metadata<\/span><span class=\"p\">,<\/span> <span class=\"no\">Metadata<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n      <span class=\"k\">end<\/span>\r\n    <span class=\"k\">end<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>self.create\u51fd\u6570\u52a8\u6001\u751f\u6210\u7ee7\u627fTypes::Collection\u5bf9\u8c61\uff08\u7684\u7c7b\uff09\u3002\u751f\u6210\u7684\u7c7b\u4f7f\u7528Types::Pagy\u4e2d\u7684pagy\u65b9\u6cd5\u8fd4\u56de\u7684collection\u548cmetadata\u4f5c\u4e3a\u5b57\u6bb5\u8fdb\u884c\u5b9a\u4e49\u3002\u8fd9\u91cc\u4f7f\u7528Types::Collection\u800c\u4e0d\u662fTypes::BaseObject\u662f\u4e3a\u4e86\u540e\u7eed\u5224\u65ad\u4e4b\u7528\u3002<\/p>\n<h2>\u57fa\u4e8e\u57fa\u672c\u5bf9\u8c61\u7684collection_type\u5b9e\u73b0\u3002<\/h2>\n<p>\u4e3a\u4e86\u4f7f\u4efb\u4f55\u5bf9\u8c61\u90fd\u80fd\u4f7f\u7528\uff0c\u6211\u4eec\u5c06\u5728\u57fa\u7840\u5bf9\u8c61\u4e2d\u5b9e\u73b0\u4e00\u4e2a\u540d\u4e3acollection_type\u7684\u7c7b\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Types<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">BaseObject<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">GraphQL<\/span><span class=\"o\">::<\/span><span class=\"no\">Schema<\/span><span class=\"o\">::<\/span><span class=\"no\">Object<\/span>\r\n    <span class=\"n\">edge_type_class<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseEdge<\/span>\r\n    <span class=\"n\">connection_type_class<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseConnection<\/span>\r\n    <span class=\"n\">field_class<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseField<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nc\">self<\/span><span class=\"o\">.<\/span><span class=\"nf\">collection_type<\/span>\r\n      <span class=\"vi\">@collection_type<\/span> <span class=\"o\">||=<\/span> <span class=\"no\">Collection<\/span><span class=\"p\">.<\/span><span class=\"nf\">create<\/span> <span class=\"nb\">self<\/span>\r\n    <span class=\"k\">end<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>Types::Collection.create\u8fd9\u4e2a\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2aself\u53c2\u6570\uff08\u4ee3\u8868\u81ea\u8eab\u7684\u7c7b\uff09\uff0c\u4f46\u662f\u8981\u77e5\u9053\uff0ccollection_type\u65b9\u6cd5\u672c\u8eab\u662f\u4e00\u4e2a\u7ee7\u627f\u81eaTypes::BaseObject\u7684\u7c7b\uff08\u6bd4\u5982Types::Test\uff09\u4f1a\u8c03\u7528\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u6211\u4eec\u53ef\u4ee5\u77e5\u9053self\u53c2\u6570\u4e2d\u4f1a\u4f20\u5165Types::Test\u8fd9\u6837\u7684\u5bf9\u8c61\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u5c31\u53ef\u4ee5\u52a8\u6001\u5730\u751f\u6210\u5305\u542bTypes::Test\u7684\u65b0\u7c7b\u3002<\/p>\n<h2>\u62e1\u5927\u57fa\u5730\u9886\u57df<\/h2>\n<p>\u4f7f\u7528\u4e0a\u8ff0\u7684Types::PagyExtension\uff0c\u5728\u6700\u540e\u6765\u6269\u5c55Types::BaseField\uff0c\u4ee5\u5b9e\u73b0\u81ea\u52a8\u5b9a\u4e49\u53c2\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Types<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">BaseField<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">GraphQL<\/span><span class=\"o\">::<\/span><span class=\"no\">Schema<\/span><span class=\"o\">::<\/span><span class=\"no\">Field<\/span>\r\n    <span class=\"n\">argument_class<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseArgument<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">initialize<\/span> <span class=\"o\">**<\/span><span class=\"n\">kwargs<\/span><span class=\"p\">,<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">block<\/span>\r\n      <span class=\"k\">super<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"k\">unless<\/span> <span class=\"n\">kwargs<\/span><span class=\"p\">[<\/span><span class=\"ss\">:type<\/span><span class=\"p\">].<\/span><span class=\"nf\">is_a?<\/span> <span class=\"no\">Class<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"k\">unless<\/span> <span class=\"n\">kwargs<\/span><span class=\"p\">[<\/span><span class=\"ss\">:type<\/span><span class=\"p\">]<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">Collection<\/span>\r\n      <span class=\"n\">extension<\/span> <span class=\"no\">PagyExtension<\/span>\r\n    <span class=\"k\">end<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5224\u65adkwargs[:type]\u662f\u5426\u662fTypes::Collection\u3002\u8fd9\u6837\uff0c\u53ea\u6709\u5728\u9700\u8981\u7684\u60c5\u51b5\u4e0b\uff08\u5373\u7ee7\u627f\u4e86Types::Collection\u7684\u7c7b\uff09\uff0cTypes::PagyExtension\u4e2d\u5b9a\u4e49\u7684page\u548citems\u624d\u4f1a\u81ea\u52a8\u5b9a\u4e49\u3002<\/p>\n<p>\u8fd9\u6837\u4e00\u6765\uff0c\u5b9e\u65bd\u5c31\u5b8c\u6210\u4e86\u3002<\/p>\n<h1>\u8003\u8bd5 sh\u00ec)<\/h1>\n<p>\u6211\u4f7f\u7528\u968f\u673a\u6570\u636e\u5728graphiql-rails\u4e2d\u8fdb\u884c\u4e86\u6d4b\u8bd5\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d7ff9913a08637a6a83cc\/51-0.png\" alt=\"Screen Shot 2021-06-23 at 1.23.33.png\" 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