{"id":47800,"date":"2023-05-16T11:57:12","date_gmt":"2023-12-26T03:25:04","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90rails6%e3%80%91%e5%88%a9%e7%94%a8graphql%e5%bc%80%e5%8f%91api%ef%bc%88%e6%9f%a5%e8%af%a2%e7%af%87%ef%bc%89\/"},"modified":"2024-04-30T04:26:38","modified_gmt":"2024-04-29T20:26:38","slug":"%e3%80%90rails6%e3%80%91%e5%88%a9%e7%94%a8graphql%e5%bc%80%e5%8f%91api%ef%bc%88%e6%9f%a5%e8%af%a2%e7%af%87%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90rails6%e3%80%91%e5%88%a9%e7%94%a8graphql%e5%bc%80%e5%8f%91api%ef%bc%88%e6%9f%a5%e8%af%a2%e7%af%87%ef%bc%89\/","title":{"rendered":"\u3010Rails6\u3011\u5229\u7528GraphQL\u5f00\u53d1API\uff08\u67e5\u8be2\u7bc7\uff09"},"content":{"rendered":"<h2>\u9996\u5148<\/h2>\n<p>\u6211\u4f7f\u7528Rails 6\u8fdb\u884c\u4e86GraphQL\u5f00\u53d1\uff0c\u5e76\u603b\u7ed3\u4e86\u5176\u4f7f\u7528\u548c\u5f15\u5165\u65b9\u6cd5\u3002\u8fd9\u6b21\u6211\u5c06\u4ecb\u7ecd\u67e5\u8be2\/\u5173\u8054\u548cN+1\u95ee\u9898\u3002<\/p>\n<h2>\u5f00\u53d1\u73af\u5883<\/h2>\n<p>ruby2.7.1<br \/>\nrails6.0.3<br \/>\nGraphQL -&gt; Ruby2.7.1\u3001Rails6.0.3\u3001GraphQL<\/p>\n<h2>GraphQL\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>GraphQL\u662f\u4e00\u79cd\u7528\u4e8eAPI\u8bf7\u6c42\u7684\u67e5\u8be2\u8bed\u8a00\uff0c\u5177\u6709\u4ee5\u4e0b\u7279\u70b9\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306f\/graphql1\u3064\u306e\u307f<\/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\">Query: \u30c7\u30fc\u30bf\u306e\u53d6\u5f97(Get)<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Mutation: \u30c7\u30fc\u30bf\u306e\u4f5c\u6210\u3001\u66f4\u65b0\u3001\u524a\u9664(Create, Update, Delete)<\/ul>\n<p>\u4e0eREST\u4e0d\u540c\u7684\u4e00\u4e2a\u91cd\u8981\u533a\u522b\u662fGraphQL\u53ea\u6709\u4e00\u4e2a\u7aef\u70b9\u3002\u5728REST\u4e2d\uff0c\u5b58\u5728\u591a\u4e2a\u7aef\u70b9\uff0c\u5982\/sign_up\u3001\/users\u3001\/users\/1\u7b49\uff0c\u800c\u5728GraphQL\u4e2d\uff0c\u53ea\u6709\u4e00\u4e2a\u7aef\u70b9\uff0c\u5373\/graphql\u3002<\/p>\n<p>\u5728REST\u4e2d\uff0c\u5982\u679c\u9700\u8981\u591a\u4e2a\u8d44\u6e90\uff0c\u5c31\u9700\u8981\u53d1\u8d77\u591a\u4e2aAPI\u8bf7\u6c42\uff0c\u800cGraphQL\u53ea\u6709\u4e00\u4e2a\u7aef\u70b9\uff0c\u53ef\u4ee5\u4e00\u6b21\u83b7\u53d6\u6240\u9700\u7684\u6570\u636e\uff0c\u4ece\u800c\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u3002<\/p>\n<h2>2. \u8fd9\u6b21\u4f7f\u7528\u7684\u684c\u5b50<\/h2>\n<p>\u9019\u5c07\u5728\u5169\u500b\u8cc7\u6599\u8868\u4e2d\u5be6\u73fe\uff0c\u7236\u89aa\u8cc7\u6599\u8868\u662fUser\uff0c\u5b50\u8cc7\u6599\u8868\u662fPost\u3002\u6211\u5011\u5c07\u8a2d\u5b9aUser\u53ef\u4ee5\u767c\u4f48\u591a\u500bPost\u7684\u4e00\u5c0d\u591a\u95dc\u4fc2\u3002<\/p>\n<pre class=\"post-pre\"><code>$ rails g model User name:string email:string\r\n$ rails g model Post title:string description:string user:references\r\n$ rails db:migrate\r\n<\/code><\/pre>\n<h3>\u7528\u6237\u8868<\/h3>\n<div>\n<div class=\"post-table\">\u30ab\u30e9\u30e0\u578bnamestringemailstring<\/div>\n<\/div>\n<pre class=\"post-pre\"><code><span class=\"k\">class<\/span> <span class=\"nc\">User<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">ApplicationRecord<\/span>\r\n  <span class=\"n\">has_many<\/span> <span class=\"ss\">:posts<\/span><span class=\"p\">,<\/span> <span class=\"ss\">dependent: :destroy<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<h3>\u5e16\u5b50\u6570\u636e\u8868<\/h3>\n<div>\n<div class=\"post-table\">\u30ab\u30e9\u30e0\u578btitlestringdescriptionstring<\/div>\n<\/div>\n<pre class=\"post-pre\"><code><span class=\"k\">class<\/span> <span class=\"nc\">Post<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">ApplicationRecord<\/span>\r\n  <span class=\"n\">belongs_to<\/span> <span class=\"ss\">:user<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<h2>\u5728Rails\u4e2d\u5f15\u5165GraphQL<\/h2>\n<p>\u5b89\u88c5gem\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">gem<\/span> <span class=\"s1\">'graphql'<\/span>    <span class=\"c1\">#\u8ffd\u52a0<\/span>\r\n\r\n<span class=\"n\">group<\/span> <span class=\"ss\">:development<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:test<\/span> <span class=\"k\">do<\/span>\r\n  <span class=\"n\">gem<\/span> <span class=\"s1\">'byebug'<\/span><span class=\"p\">,<\/span> <span class=\"ss\">platforms: <\/span><span class=\"p\">[<\/span><span class=\"ss\">:mri<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:mingw<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:x64_mingw<\/span><span class=\"p\">]<\/span>\r\n  <span class=\"n\">gem<\/span> <span class=\"s1\">'graphiql-rails'<\/span>   <span class=\"c1\">#\u958b\u767a\u74b0\u5883\u306b\u8ffd\u52a0<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nb\">require<\/span> <span class=\"s2\">\"sprockets\/railtie\"<\/span>    <span class=\"c1\">#\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3092\u5916\u3059<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>$ bundle install\r\n$ rails generate graphql:install   #GraphQL\u306b\u95a2\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\r\n<\/code><\/pre>\n<p>\u8bf7\u5728routes.rb\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u5185\u5bb9\uff1a<br \/>\n\u5728\u5f00\u53d1\u73af\u5883\u4e0b\uff0c\u7aef\u70b9\u4e3a\/graphiql\uff0c\u5728\u751f\u4ea7\u73af\u5883\u4e0b\uff0c\u7aef\u70b9\u4e3a\/graphql\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"no\">Rails<\/span><span class=\"p\">.<\/span><span class=\"nf\">application<\/span><span class=\"p\">.<\/span><span class=\"nf\">routes<\/span><span class=\"p\">.<\/span><span class=\"nf\">draw<\/span> <span class=\"k\">do<\/span>\r\n  <span class=\"k\">if<\/span> <span class=\"no\">Rails<\/span><span class=\"p\">.<\/span><span class=\"nf\">env<\/span><span class=\"p\">.<\/span><span class=\"nf\">development?<\/span>\r\n    <span class=\"c1\"># add the url of your end-point to graphql_path.<\/span>\r\n    <span class=\"n\">mount<\/span> <span class=\"no\">GraphiQL<\/span><span class=\"o\">::<\/span><span class=\"no\">Rails<\/span><span class=\"o\">::<\/span><span class=\"no\">Engine<\/span><span class=\"p\">,<\/span> <span class=\"ss\">at: <\/span><span class=\"s2\">\"\/graphiql\"<\/span><span class=\"p\">,<\/span> <span class=\"ss\">graphql_path: <\/span><span class=\"s2\">\"\/graphql\"<\/span> \r\n  <span class=\"k\">end<\/span>\r\n  <span class=\"n\">post<\/span> <span class=\"s1\">'\/graphql'<\/span><span class=\"p\">,<\/span> <span class=\"ss\">to: <\/span><span class=\"s1\">'graphql#execute'<\/span>  <span class=\"c1\">#\u3053\u3053\u306frails generate graphql:install\u3067\u81ea\u52d5\u751f\u6210\u3055\u308c\u308b<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u8bf7\u53c2\u8003\u4e0b\u9762\u7684\u8be6\u7ec6\u603b\u7ed3\uff0c\u4e86\u89e3\u5728Rails 6\u7684API\u6a21\u5f0f\u4e0b\u5982\u4f55\u4f7f\u7528GraphQL\uff08\u5305\u62ec\u9519\u8bef\u5904\u7406\u65b9\u6cd5\uff09\u3002<\/p>\n<h2>\u67e5\u8be2\u83b7\u53d6\u7528\u6237\u5217\u8868\u7684\u547d\u4ee4<\/h2>\n<p>\u5728GraphQL\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u7c7b\u578b\uff08\u9488\u5bf9\u6bcf\u4e2a\u6a21\u578b\uff09\uff0c\u7136\u540e\u6309\u7167\u8fd9\u4e9b\u7c7b\u578b\u6267\u884c\u67e5\u8be2\u6765\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<h3>\u521b\u5efa\u7528\u6237\u7684ObjectType<\/h3>\n<p>\u4f7f\u7528\u4e0b\u9762\u7684\u547d\u4ee4\u6765\u521b\u5efa\u7528\u6237\u7c7b\u578b\u3002<br \/>\n\u6dfb\u52a0\u611f\u53f9\u53f7\uff08!\uff09\u5c06\u6dfb\u52a0 null:false\u3002<\/p>\n<pre class=\"post-pre\"><code>$ rails g graphql:object User id:ID! name:String! email:String!\r\n<\/code><\/pre>\n<p>\u4f1a\u751f\u6210\u4e0b\u8ff0\u6587\u4ef6\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\">UserType<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseObject<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:id<\/span><span class=\"p\">,<\/span> <span class=\"no\">ID<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>  <span class=\"c1\"># `!`\u3092\u3064\u3051\u308b\u3068`null:false`\u304c\u8ffd\u52a0\u3055\u308c\u307e\u3059\u3002<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:name<\/span><span class=\"p\">,<\/span> <span class=\"no\">String<\/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\">:email<\/span><span class=\"p\">,<\/span> <span class=\"no\">String<\/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<\/code><\/pre>\n<h3>\u521b\u5efa\u7528\u6237\u7684\u67e5\u8be2<\/h3>\n<p>\u6839\u636e\u521a\u521a\u521b\u5efa\u7684\u7528\u6237\u7c7b\u578b\u6765\u751f\u6210\u67e5\u8be2\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\">QueryType<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseObject<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">UserType<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span> <span class=\"c1\"># user\u3092\u914d\u5217\u3067\u5b9a\u7fa9\u3059\u308b<\/span>\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">users<\/span>\r\n      <span class=\"no\">User<\/span><span class=\"p\">.<\/span><span class=\"nf\">all<\/span> <span class=\"c1\"># user\u4e00\u89a7\u3092\u53d6\u5f97<\/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>\u4f7f\u7528\u63a7\u5236\u53f0\u521b\u5efa\u7528\u6237\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code>$ rails c\r\n$ &gt; User.create(name: \"user1\", email: \"user-1@test.com\")\r\n$ &gt; User.create(name: \"user2\", email: \"user-2@test.com\")\r\n<\/code><\/pre>\n<h3>\u6267\u884c\u67e5\u8be2<\/h3>\n<p>\u51c6\u5907\u5de5\u4f5c\u5df2\u7ecf\u5b8c\u6210\uff0c\u73b0\u5728\u53ef\u4ee5\u542f\u52a8\u670d\u52a1\u5668\u5e76\u5728Graphiql\u4e0a\u8fdb\u884c\u786e\u8ba4\u3002(http:\/\/localhost:3000\/graphiql)<\/p>\n<pre class=\"post-pre\"><code>$ rails s\r\n<\/code><\/pre>\n<p>\u6267\u884c\u4ee5\u4e0b\u67e5\u8be2\u3002<\/p>\n<pre class=\"post-pre\"><code>query{\r\n  users{\r\n    id\r\n    name\r\n    email\r\n  }\r\n}\r\n<\/code><\/pre>\n<p>\u7136\u540e\u4f1a\u8fd4\u56deJSON\u683c\u5f0f\u7684\u54cd\u5e94\u3002<br \/>\n\u7531\u4e8eusers\u7684Type\u662f\u6570\u7ec4\uff0c\u6240\u4ee5\u5b83\u662f\u4e00\u4e2a\u6570\u7ec4\u3002<\/p>\n<pre class=\"post-pre\"><code>{\r\n  \"data\": {\r\n    \"users\": [\r\n      {\r\n        \"id\": \"1\",\r\n        \"name\": \"user1\",\r\n        \"email\": \"user-1@test.com\"\r\n      },\r\n      {\r\n        \"id\": \"2\",\r\n        \"name\": \"user2\",\r\n        \"email\": \"user-2@test.com\"\r\n      }\r\n    ]\r\n  }\r\n}\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8128913a08637a6ac744\/45-0.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2020-09-27 20.32.34.png\" \/><\/div>\n<h3>\u5982\u679c\u53ea\u8bf7\u6c42\u5e76\u63a5\u6536\u5fc5\u8981\u7684\u6570\u636e<\/h3>\n<p>\u5982\u679c\u4e0d\u9700\u8981\u6240\u6709\u5217\u7684\u6570\u636e\uff0c\u5219\u53ef\u4ee5\u4fee\u6539\u67e5\u8be2\u3002<br \/>\n\u4f8b\u5982\uff0c\u60a8\u4e5f\u53ef\u4ee5\u4ec5\u83b7\u53d6\u7528\u6237\u7684ID\u3002<\/p>\n<pre class=\"post-pre\"><code>query{\r\n  users{\r\n    id\r\n  }\r\n}\r\n<\/code><\/pre>\n<p>&#8220;\u56de\u5e94&#8221;<\/p>\n<pre class=\"post-pre\"><code>{\r\n  \"data\": {\r\n    \"users\": [\r\n      {\r\n        \"id\": \"1\",\r\n      },\r\n      {\r\n        \"id\": \"2\",\r\n      }\r\n    ]\r\n  }\r\n}\r\n<\/code><\/pre>\n<h2>5. \u534f\u4f1a (xi\u00e9 hu\u00ec)<\/h2>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c1d\u8bd5\u83b7\u53d6\u4e0e\u7528\u6237\u76f8\u5173\u8054\u7684\u5e16\u5b50\u3002<br \/>\n\u6211\u4eec\u5c06\u4ee5\u540c\u6837\u7684\u65b9\u5f0f\u521b\u5efa\u7528\u6237\u7684ObjectType\u548cQuery\u3002<\/p>\n<h3>\u751f\u6210Post\u7684ObjectType\u3002<\/h3>\n<pre class=\"post-pre\"><code>$ rails g graphql:object Post id:ID! title:String! description:String!\r\n<\/code><\/pre>\n<p>\u5c06\u751f\u6210\u4ee5\u4e0b\u6587\u4ef6\u3002<br \/>\n\u4e3a\u4e86\u83b7\u53d6\u7528\u6237\u6570\u636e\uff0c\u6211\u4eec\u5c06\u6dfb\u52a0\u5b57\u6bb5:user\uff0c\u7c7b\u578b\u4e3aTypes::UserType\uff0c\u4e0d\u5141\u8bb8\u4e3a\u7a7a\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\">PostType<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseObject<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:id<\/span><span class=\"p\">,<\/span> <span class=\"no\">ID<\/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\">:title<\/span><span class=\"p\">,<\/span> <span class=\"no\">String<\/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\">:description<\/span><span class=\"p\">,<\/span> <span class=\"no\">String<\/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\">:user<\/span><span class=\"p\">,<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">UserType<\/span><span class=\"p\">,<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span> <span class=\"c1\"># \u3053\u306e\u4e00\u6587\u3092\u8ffd\u52a0\u3002belongs_to :user\u306e\u3088\u3046\u306a\u3082\u306e<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u5728UserType\u4e2d\u6dfb\u52a0\u5b57\u6bb5: posts, [Types::PostType], null: false\u3002<br \/>\n\u7531\u4e8e\u8fd9\u662f\u591a\u4e2a\u6570\u636e\u5173\u8054\uff0c\u56e0\u6b64\u4f7f\u7528\u6570\u7ec4\u8fdb\u884c\u5b9a\u4e49\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\">UserType<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseObject<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:id<\/span><span class=\"p\">,<\/span> <span class=\"no\">ID<\/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\">:name<\/span><span class=\"p\">,<\/span> <span class=\"no\">String<\/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\">:email<\/span><span class=\"p\">,<\/span> <span class=\"no\">String<\/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\">:posts<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">PostType<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span> <span class=\"c1\"># \u3053\u306e\u4e00\u6587\u3092\u8ffd\u52a0\u3002has_many :posts\u306e\u3088\u3046\u306a\u3082\u306e<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>$ rails c\r\n$ &gt; Post.create(title: \"title\", description: \"description\", user_id: 1)\r\n<\/code><\/pre>\n<h3>\u751f\u6210Post\u7684\u67e5\u8be2<\/h3>\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\">QueryType<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseObject<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">UserType<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">users<\/span>\r\n      <span class=\"no\">User<\/span><span class=\"p\">.<\/span><span class=\"nf\">all<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"c1\"># \u4e0b\u8a18\u3092\u8ffd\u52a0<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:posts<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">PostType<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">posts<\/span>\r\n      <span class=\"no\">Post<\/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<h3>\u6267\u884c\u67e5\u8be2\u3002<\/h3>\n<p>\u8fd9\u662f\u4e00\u4e2a\u8981\u6267\u884c\u7684\u67e5\u8be2\u3002<\/p>\n<p>\u5c06\u5e16\u5b50\u5d4c\u5957\u5728\u7528\u6237\u4e2d\u5e76\u8fdb\u884c\u8bf7\u6c42\u3002<\/p>\n<pre class=\"post-pre\"><code>query{\r\n  users{\r\n    id\r\n    name\r\n    email\r\n    post{\r\n      id\r\n      title\r\n      description\r\n    }\r\n  }\r\n}\r\n<\/code><\/pre>\n<p>\u6267\u884c\u540e\u5c06\u8fd4\u56de\u5d4c\u5957\u7684\u5e16\u5b50\u6570\u636e\u3002<br \/>\n\u5728REST\u73af\u5883\u4e2d\uff0c\u53ef\u4ee5\u83b7\u53d6\u7528\u6237\u7684\u5e16\u5b50\u6570\u636e\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8128913a08637a6ac744\/66-0.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2020-09-27 21.00.34.png\" \/><\/div>\n<p>\u5982\u679c\u9700\u8981post.user\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u7684\u67e5\u8be2\u6765\u83b7\u53d6\u3002<\/p>\n<pre class=\"post-pre\"><code>query{\r\n  posts{\r\n    id\r\n    title\r\n    description\r\n    user{\r\n      id\r\n    }\r\n  }\r\n}\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8128913a08637a6ac744\/69-0.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2020-09-28 9.54.16.png\" \/><\/div>\n<h2>\u5f15\u5165\u80fd\u591f\u68c0\u6d4b\u5230N+1\u7684\u5b50\u5f39<\/h2>\n<p>\u7531\u4e8eGraphQL\u67e5\u8be2\u662f\u6811\u72b6\u7ed3\u6784\uff0c\u6240\u4ee5\u5f53\u5b58\u5728\u5173\u8054\u65f6\uff0c\u5bb9\u6613\u51fa\u73b0N+1\u95ee\u9898\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5efa\u8bae\u5f15\u5165\u7528\u4e8e\u68c0\u6d4bN+1\u95ee\u9898\u7684Bullet gem\u3002<\/p>\n<h3>\u5b89\u88c5Bullet<\/h3>\n<pre class=\"post-pre\"><code><span class=\"n\">group<\/span> <span class=\"ss\">:development<\/span> <span class=\"k\">do<\/span>\r\n  <span class=\"n\">gem<\/span> <span class=\"s1\">'bullet'<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>$ bundle install\r\n<\/code><\/pre>\n<p>\u5728`config\/environments\/development.rb`\u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u914d\u7f6e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">config<\/span><span class=\"p\">.<\/span><span class=\"nf\">after_initialize<\/span> <span class=\"k\">do<\/span>\r\n  <span class=\"no\">Bullet<\/span><span class=\"p\">.<\/span><span class=\"nf\">enable<\/span> <span class=\"o\">=<\/span> <span class=\"kp\">true<\/span>\r\n  <span class=\"no\">Bullet<\/span><span class=\"p\">.<\/span><span class=\"nf\">alert<\/span> <span class=\"o\">=<\/span> <span class=\"kp\">true<\/span>\r\n  <span class=\"no\">Bullet<\/span><span class=\"p\">.<\/span><span class=\"nf\">bullet_logger<\/span> <span class=\"o\">=<\/span> <span class=\"kp\">true<\/span>\r\n  <span class=\"no\">Bullet<\/span><span class=\"p\">.<\/span><span class=\"nf\">console<\/span> <span class=\"o\">=<\/span> <span class=\"kp\">true<\/span>\r\n  <span class=\"no\">Bullet<\/span><span class=\"p\">.<\/span><span class=\"nf\">rails_logger<\/span> <span class=\"o\">=<\/span> <span class=\"kp\">true<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<h3>\u6211\u8bd5\u7740\u786e\u8ba4N+1\u3002<\/h3>\n<p>\u5f53Bullet\u7684\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u8ba9\u6211\u4eec\u6765\u786e\u8ba4\u4e00\u4e0b\u662f\u5426\u51fa\u73b0\u4e86N+1\u3002<\/p>\n<pre class=\"post-pre\"><code>query{\r\n  users{\r\n    id\r\n    name\r\n    email\r\n    posts{\r\n      id\r\n      title\r\n      description\r\n    }\r\n  }\r\n}\r\n<\/code><\/pre>\n<p>\u5982\u679c\u6267\u884c\u4e0e\u4e4b\u524d\u76f8\u540c\u7684\u67e5\u8be2\uff0c\u5c06\u4f1a\u51fa\u73b0\u4ee5\u4e0b\u65e5\u5fd7\u3002<\/p>\n<pre class=\"post-pre\"><code>Processing by GraphqlController#execute as *\/*\r\n  Parameters: {\"query\"=&gt;\"query{\\n  users{\\n    id\\n    name\\n    email\\n    posts{\\n      id\\n      title\\n      description\\n    }\\n  }\\n}\", \"variables\"=&gt;nil, \"graphql\"=&gt;{\"query\"=&gt;\"query{\\n  users{\\n    id\\n    name\\n    email\\n    posts{\\n      id\\n      title\\n      description\\n    }\\n  }\\n}\", \"variables\"=&gt;nil}}\r\n  User Load (0.2ms)  SELECT \"users\".* FROM \"users\"\r\n  \u21b3 app\/controllers\/graphql_controller.rb:15:in `execute'\r\n  Post Load (0.2ms)  SELECT \"posts\".* FROM \"posts\" WHERE \"posts\".\"user_id\" = ?  [[\"user_id\", 1]]\r\n  \u21b3 app\/controllers\/graphql_controller.rb:15:in `execute'\r\n  Post Load (0.1ms)  SELECT \"posts\".* FROM \"posts\" WHERE \"posts\".\"user_id\" = ?  [[\"user_id\", 2]]\r\n  \u21b3 app\/controllers\/graphql_controller.rb:15:in `execute'\r\nCompleted 200 OK in 36ms (Views: 0.3ms | ActiveRecord: 1.7ms | Allocations: 18427)\r\n\r\n\r\nPOST \/graphql\r\nUSE eager loading detected\r\n  User =&gt; [:posts]\r\n  Add to your query: .includes([:posts])\r\nCall stack\r\n<\/code><\/pre>\n<p>\u5728\u60a8\u7684\u67e5\u8be2\u4e2d\u6dfb\u52a0.includes([:posts])\u7684\u539f\u56e0\u662f\u51fa\u73b0\u4e86N+1\u95ee\u9898\u3002<br \/>\nSQL\u67e5\u8be2\u4e5f\u6267\u884c\u4e86\u4e09\u6b21\u3002<\/p>\n<pre class=\"post-pre\"><code>User Load (0.2ms)  SELECT \"users\".* FROM \"users\"\r\nPost Load (0.2ms)  SELECT \"posts\".* FROM \"posts\" WHERE \"posts\".\"user_id\" = ?  [[\"user_id\", 1]]\r\nPost Load (0.1ms)  SELECT \"posts\".* FROM \"posts\" WHERE \"posts\".\"user_id\" = ?  [[\"user_id\", 2]]\r\n<\/code><\/pre>\n<h3>\u89e3\u51b3N+1\u7684\u65b9\u6cd5<\/h3>\n<p>\u8981\u6d88\u9664N+1\uff0c\u4e00\u822c\u6765\u8bf4\uff0c\u53ea\u9700\u8981\u4f7f\u7528includes\u5c31\u53ef\u4ee5\u4e86\u3002<br \/>\n\u4e5f\u53ef\u4ee5\u901a\u8fc7dataloader\u89e3\u51b3\uff0c\u4f46\u8fd9\u6b21\u6211\u4eec\u5c06\u4f7f\u7528includes\u3002<br \/>\n\u6211\u4eec\u5c06\u66f4\u6539\u83b7\u53d6\u7528\u6237\u5217\u8868\u7684\u90e8\u5206\u5982\u4e0b\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">def<\/span> <span class=\"nf\">users<\/span>\r\n  <span class=\"c1\"># User.all  # \u5909\u66f4\u524d<\/span>\r\n  <span class=\"no\">User<\/span><span class=\"p\">.<\/span><span class=\"nf\">includes<\/span><span class=\"p\">(<\/span><span class=\"ss\">:posts<\/span><span class=\"p\">).<\/span><span class=\"nf\">all<\/span> <span class=\"c1\"># \u5909\u66f4\u5f8c<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u8ba9\u6211\u4eec\u901a\u8fc7\u65e5\u5fd7\u6765\u786e\u8ba4N+1\u662f\u5426\u5df2\u7ecf\u89e3\u51b3\u3002<br \/>\n\u8b66\u544a\u5df2\u7ecf\u6d88\u5931\u4e86\u3002<\/p>\n<pre class=\"post-pre\"><code>Processing by GraphqlController#execute as *\/*\r\n  Parameters: {\"query\"=&gt;\"query{\\n  users{\\n    id\\n    name\\n    email\\n    posts{\\n      id\\n      title\\n      description\\n    }\\n  }\\n}\", \"variables\"=&gt;nil, \"graphql\"=&gt;{\"query\"=&gt;\"query{\\n  users{\\n    id\\n    name\\n    email\\n    posts{\\n      id\\n      title\\n      description\\n    }\\n  }\\n}\", \"variables\"=&gt;nil}}\r\n  User Load (0.7ms)  SELECT \"users\".* FROM \"users\"\r\n  \u21b3 app\/controllers\/graphql_controller.rb:15:in `execute'\r\n  Post Load (1.2ms)  SELECT \"posts\".* FROM \"posts\" WHERE \"posts\".\"user_id\" IN (?, ?)  [[\"user_id\", 1], [\"user_id\", 2]]\r\n  \u21b3 app\/controllers\/graphql_controller.rb:15:in `execute'\r\nCompleted 200 OK in 57ms (Views: 0.2ms | ActiveRecord: 1.9ms | Allocations: 15965)\r\n<\/code><\/pre>\n<p>\u7531\u4e8eSQL\u6587\u51cf\u5c11\u5230\u4e24\u4e2a\uff0cN+1\u95ee\u9898\u5df2\u7ecf\u6210\u529f\u89e3\u51b3\u3002<\/p>\n<pre class=\"post-pre\"><code>User Load (0.7ms)  SELECT \"users\".* FROM \"users\"\r\nPost Load (1.2ms)  SELECT \"posts\".* FROM \"posts\" WHERE \"posts\".\"user_id\" IN (?, ?)  [[\"user_id\", 1], [\"user_id\", 2]]\r\n<\/code><\/pre>\n<h2>7. \u63d0\u53d6resolver<\/h2>\n<h3>\u5e38\u89c1\u7684\u67e5\u8be2<\/h3>\n<p>\u5982\u679c\u6309\u7167\u5e38\u89c4\u65b9\u6cd5\u7f16\u5199\u4ee3\u7801\uff0c\u4e0d\u7ba1\u6a21\u578b\u5982\u4f55\uff0cfields\u548c\u65b9\u6cd5\u4f1a\u88ab\u6dfb\u52a0\u5230query_type\u4e2d\uff0c\u4f7f\u5f97query_type\u8d8a\u6765\u8d8a\u5e9e\u5927\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\">QueryType<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">BaseObject<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">UserType<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">users<\/span>\r\n      <span class=\"no\">User<\/span><span class=\"p\">.<\/span><span class=\"nf\">includes<\/span><span class=\"p\">(<\/span><span class=\"ss\">:posts<\/span><span class=\"p\">).<\/span><span class=\"nf\">all<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:posts<\/span><span class=\"p\">,<\/span> <span class=\"p\">[<\/span><span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">PostType<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">posts<\/span>\r\n      <span class=\"no\">Post<\/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<h3>\u4f7f\u7528Resolver\u6765\u67e5\u8be2<\/h3>\n<p>\u5728GitHub\u7684\u95ee\u9898\u4e2d\uff0c\u901a\u8fc7\u4f7f\u7528Resolver\uff0c\u4ecb\u7ecd\u4e86\u4e00\u79cd\u907f\u514dquery_type.rb\u6269\u5927\u5316\u7684\u6700\u4f73\u5b9e\u8df5\u3002<br \/>\nhttps:\/\/github.com\/rmosolgo\/graphql-ruby\/issues\/1825#issuecomment-441306410<\/p>\n<p>\u8bf7\u53ea\u5b9a\u4e49field\u5728query_type\u4e2d\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\">QueryType<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">BaseObject<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">resolver: <\/span><span class=\"no\">Resolvers<\/span><span class=\"o\">::<\/span><span class=\"no\">QueryTypes<\/span><span class=\"o\">::<\/span><span class=\"no\">UsersResolver<\/span>\r\n    <span class=\"n\">field<\/span> <span class=\"ss\">:posts<\/span><span class=\"p\">,<\/span> <span class=\"ss\">resolver: <\/span><span class=\"no\">Resolvers<\/span><span class=\"o\">::<\/span><span class=\"no\">QueryTypes<\/span><span class=\"o\">::<\/span><span class=\"no\">PostsResolver<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<p>\u7136\u540e\uff0c\u5c06\u65b9\u6cd5\u90e8\u5206\u6309\u7167\u6bcf\u4e2aObjectType\u5207\u5206\u5230Resolver\u4e2d\uff08\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u7684 resolvers \u76ee\u5f55\uff09\u3002<br \/>\n\u8bf7\u52a1\u5fc5\u4e0d\u8981\u5fd8\u8bb0\u5199\u4e0a GraphQL::Schema::Resolver\uff0c\u5426\u5219\u4f1a\u62a5\u9519\uff0c\u8bf7\u6ce8\u610f\u4e0d\u8981\u5fd8\u8bb0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Resolvers::QueryTypes<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">UsersResolver<\/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    <span class=\"n\">type<\/span> <span class=\"p\">[<\/span><span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">UserType<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">resolve<\/span>\r\n      <span class=\"no\">User<\/span><span class=\"p\">.<\/span><span class=\"nf\">includes<\/span><span class=\"p\">(<\/span><span class=\"ss\">:posts<\/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<pre class=\"post-pre\"><code><span class=\"k\">module<\/span> <span class=\"nn\">Resolvers::QueryTypes<\/span>\r\n  <span class=\"k\">class<\/span> <span class=\"nc\">PostsResolver<\/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    <span class=\"n\">type<\/span> <span class=\"p\">[<\/span><span class=\"no\">Types<\/span><span class=\"o\">::<\/span><span class=\"no\">PostType<\/span><span class=\"p\">],<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">resolve<\/span>\r\n      <span class=\"no\">Post<\/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<h2>\u6700\u540e<\/h2>\n<p>\u5173\u4e8eGraphQL\uff0c\u5f53\u6211\u5728\u590d\u4e60\u65f6\uff0c\u603b\u7ed3\u8d77\u6765\u6bd4\u60f3\u8c61\u4e2d\u66f4\u957f\u3002\u867d\u7136\u6211\u60f3\u5199\u5173\u4e8erspec\u548cmutation\u7684\u5185\u5bb9\uff0c\u4f46\u6211\u6253\u7b97\u7559\u5230\u4e0b\u6b21\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u6211\u4f7f\u7528Rails 6\u8fdb\u884c\u4e86GraphQL\u5f00\u53d1\uff0c\u5e76\u603b\u7ed3\u4e86\u5176\u4f7f\u7528\u548c\u5f15\u5165\u65b9\u6cd5\u3002\u8fd9\u6b21\u6211\u5c06\u4ecb\u7ecd\u67e5\u8be2\/\u5173\u8054\u548cN+1\u95ee [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47800","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is 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