{"id":34582,"date":"2023-10-06T16:42:05","date_gmt":"2023-01-20T15:27:03","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%86%e6%9b%b4%e6%96%b0%e9%a2%91%e7%8e%87%e8%be%83%e4%bd%8e%e7%9a%84%e5%88%97%e5%88%86%e7%a6%bb%e5%88%b0%e5%8f%a6%e4%b8%80%e4%b8%aa%e8%a1%a8%e4%b8%ad%e8%bf%9b%e8%a1%8c%e9%87%8d%e6%9e%84rails\/"},"modified":"2024-05-04T03:07:04","modified_gmt":"2024-05-03T19:07:04","slug":"%e5%b0%86%e6%9b%b4%e6%96%b0%e9%a2%91%e7%8e%87%e8%be%83%e4%bd%8e%e7%9a%84%e5%88%97%e5%88%86%e7%a6%bb%e5%88%b0%e5%8f%a6%e4%b8%80%e4%b8%aa%e8%a1%a8%e4%b8%ad%e8%bf%9b%e8%a1%8c%e9%87%8d%e6%9e%84rails","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%b0%86%e6%9b%b4%e6%96%b0%e9%a2%91%e7%8e%87%e8%be%83%e4%bd%8e%e7%9a%84%e5%88%97%e5%88%86%e7%a6%bb%e5%88%b0%e5%8f%a6%e4%b8%80%e4%b8%aa%e8%a1%a8%e4%b8%ad%e8%bf%9b%e8%a1%8c%e9%87%8d%e6%9e%84rails\/","title":{"rendered":"\u5c06\u66f4\u65b0\u9891\u7387\u8f83\u4f4e\u7684\u5217\u5206\u79bb\u5230\u53e6\u4e00\u4e2a\u8868\u4e2d\u8fdb\u884c\u91cd\u6784Rails"},"content":{"rendered":"<h1>\u5728\u4ec0\u4e48\u65f6\u5019\u6709\u6548\uff1f<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">1\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u4e2d\u306b\u66f4\u65b0\/\u53c2\u7167\u983b\u5ea6\u304c\u9ad8\u3044\u30ab\u30e9\u30e0\u3068\u4f4e\u3044\u30ab\u30e9\u30e0\u304c\u6df7\u5728\u3057\u3066\u3044\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">1\u3064\u306emodel\u306b\u5927\u91cf\u306e\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u304c\u3042\u3063\u3066\u53ef\u8aad\u6027\u304c\u4f4e\u3044<\/ul>\n<h1>\u63d0\u53d6\u5217\u7684\u597d\u5904<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">memcache \u306a\u3069\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u306b\u7121\u99c4\u304c\u6e1b\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>\u53c2\u7167\u983b\u5ea6\u306e\u9ad8\u3044\u30c7\u30fc\u30bf\u3060\u3051\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u308b\u3079\u304d<\/p>\n<p>\u66f4\u65b0\u983b\u5ea6\u306e\u591a\u3044\u60c5\u5831\u306e\u30b5\u30a4\u30ba\u306f\u5c0f\u3055\u3044\u307b\u3046\u304c\u826f\u3044<\/p>\n<p>DB\u306e\u30e1\u30e2\u30ea\u306b\u306a\u308b\u3079\u304f\u4e57\u308b\u3088\u3046\u306b<\/p>\n<h1>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f8b\u5b50\u3002<\/h1>\n<p>\u5728\u7528\u6237\u6a21\u578b\u4e2d\uff0c\u5305\u542b\u7740\u66f4\u65b0\/\u53c2\u8003\u9891\u7387\u8f83\u4f4e\u7684\u5173\u4e8e\u4e2a\u4eba\u8d44\u6599\u7684\u4fe1\u606f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">zipcode<\/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\">prefecture_code<\/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\">city_code<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">address<\/ul>\n<h1>\u7528\u6237\u6a21\u578b<\/h1>\n<pre class=\"post-pre\"><code>$ rails g scaffold user name:string mail:string zipcode:string prefecture_code:integer city_code:integer address:string\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>  <span class=\"n\">create_table<\/span> <span class=\"s2\">\"users\"<\/span><span class=\"p\">,<\/span> <span class=\"ss\">force: :cascade<\/span> <span class=\"k\">do<\/span> <span class=\"o\">|<\/span><span class=\"n\">t<\/span><span class=\"o\">|<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">string<\/span>   <span class=\"s2\">\"name\"<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">string<\/span>   <span class=\"s2\">\"mail\"<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">string<\/span>   <span class=\"s2\">\"zipcode\"<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">integer<\/span>  <span class=\"s2\">\"prefecture_code\"<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">integer<\/span>  <span class=\"s2\">\"city_code\"<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">string<\/span>   <span class=\"s2\">\"address\"<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">datetime<\/span> <span class=\"s2\">\"created_at\"<\/span><span class=\"p\">,<\/span>      <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">datetime<\/span> <span class=\"s2\">\"updated_at\"<\/span><span class=\"p\">,<\/span>      <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<h1>\u5c06\u684c\u5b50\u5206\u6210\u51e0\u90e8\u5206\u3002<\/h1>\n<h2>\u521b\u5efa\u4e2a\u4eba\u8d44\u6599\u6a21\u578b<\/h2>\n<pre class=\"post-pre\"><code>$ rails g model profile zipcode:string prefecture_code:integer city_code:integer address:string user_id:integer\r\n<\/code><\/pre>\n<h2>2. \u5c06Profile\u6a21\u578b\u548cUser\u6a21\u578b\u8fdb\u884c\u5173\u8054<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">class<\/span> <span class=\"nc\">Profile<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">ActiveRecord<\/span><span class=\"o\">::<\/span><span class=\"no\">Base<\/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<p>\u901a\u8fc7\u59d4\u6258 Profile model\uff0c\u65e0\u9700\u4fee\u6539\u73b0\u6709\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">class<\/span> <span class=\"nc\">User<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">ActiveRecord<\/span><span class=\"o\">::<\/span><span class=\"no\">Base<\/span>\r\n  <span class=\"c1\"># delegate\u3059\u308b\u3053\u3068\u3067\u3001Profile \u30e2\u30c7\u30eb\u306e\u4e2d\u8eab\u3092 User \u304b\u3089\u53d6\u5f97\u3067\u304d\u308b <\/span>\r\n  <span class=\"n\">delegate<\/span> <span class=\"ss\">:zipcode<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:prefecture_code<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:city_code<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:address<\/span><span class=\"p\">,<\/span> <span class=\"ss\">to: :profile<\/span>\r\n  <span class=\"n\">has_one<\/span> <span class=\"ss\">:profile<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<h2>3. \u521b\u9020\u8fc1\u79fb<\/h2>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u521b\u5efaProfile\u8868<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5c06User\u6a21\u578b\u4e2d\u7684\u4fe1\u606f\u8f6c\u79fb\u5230Profile\u8868\u4e2d<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u4eceUser\u8868\u4e2d\u5220\u9664\u79fb\u52a8\u5230Profile\u8868\u7684\u5217<\/ol>\n<pre class=\"post-pre\"><code><span class=\"k\">class<\/span> <span class=\"nc\">CreateProfiles<\/span> <span class=\"o\">&lt;<\/span> <span class=\"no\">ActiveRecord<\/span><span class=\"o\">::<\/span><span class=\"no\">Migration<\/span>\r\n  <span class=\"k\">def<\/span> <span class=\"nf\">up<\/span>\r\n    <span class=\"c1\"># Profile\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u308b<\/span>\r\n    <span class=\"n\">create_table<\/span> <span class=\"ss\">:profiles<\/span> <span class=\"k\">do<\/span> <span class=\"o\">|<\/span><span class=\"n\">t<\/span><span class=\"o\">|<\/span>\r\n      <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">string<\/span> <span class=\"ss\">:zipcode<\/span>\r\n      <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">integer<\/span> <span class=\"ss\">:prefecture_code<\/span>\r\n      <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">integer<\/span> <span class=\"ss\">:city_code<\/span>\r\n      <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">string<\/span> <span class=\"ss\">:address<\/span>\r\n      <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">integer<\/span> <span class=\"ss\">:user_id<\/span>\r\n\r\n      <span class=\"n\">t<\/span><span class=\"p\">.<\/span><span class=\"nf\">timestamps<\/span> <span class=\"ss\">null: <\/span><span class=\"kp\">false<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"c1\"># Profile\u30c6\u30fc\u30d6\u30eb\u306b\u79fb\u884c\u3059\u308b\u60c5\u5831\u3092User\u30e2\u30c7\u30eb\u304b\u3089\u30b3\u30d4\u30fc<\/span>\r\n    <span class=\"no\">User<\/span><span class=\"p\">.<\/span><span class=\"nf\">all<\/span><span class=\"p\">.<\/span><span class=\"nf\">each<\/span> <span class=\"k\">do<\/span> <span class=\"o\">|<\/span><span class=\"n\">user<\/span><span class=\"o\">|<\/span>\r\n      <span class=\"no\">Profile<\/span><span class=\"p\">.<\/span><span class=\"nf\">create<\/span><span class=\"p\">(<\/span>\r\n        <span class=\"ss\">user:            <\/span><span class=\"n\">user<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">zipcode:         <\/span><span class=\"n\">user<\/span><span class=\"p\">.<\/span><span class=\"nf\">zipcode<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">prefecture_code: <\/span><span class=\"n\">user<\/span><span class=\"p\">.<\/span><span class=\"nf\">prefecture_code<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">city_code:       <\/span><span class=\"n\">user<\/span><span class=\"p\">.<\/span><span class=\"nf\">city_code<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">address:         <\/span><span class=\"n\">user<\/span><span class=\"p\">.<\/span><span class=\"nf\">address<\/span>\r\n      <span class=\"p\">)<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"c1\"># User\u30c6\u30fc\u30d6\u30eb\u304b\u3089\u3001Profile\u30c6\u30fc\u30d6\u30eb\u306b\u79fb\u3063\u305f\u30ab\u30e9\u30e0\u3092\u524a\u9664<\/span>\r\n    <span class=\"n\">remove_column<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:zipcode<\/span>\r\n    <span class=\"n\">remove_column<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:prefecture_code<\/span>\r\n    <span class=\"n\">remove_column<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:city_code<\/span>\r\n    <span class=\"n\">remove_column<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:address<\/span>\r\n  <span class=\"k\">end<\/span>\r\n\r\n  <span class=\"k\">def<\/span> <span class=\"nf\">down<\/span>\r\n    <span class=\"n\">add_column<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:zipcode<\/span>\r\n    <span class=\"n\">add_column<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:prefecture_code<\/span>\r\n    <span class=\"n\">add_column<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:city_code<\/span>\r\n    <span class=\"n\">add_column<\/span> <span class=\"ss\">:users<\/span><span class=\"p\">,<\/span> <span class=\"ss\">:address<\/span>\r\n\r\n    <span class=\"c1\"># Profile\u30e2\u30c7\u30eb\u306e\u60c5\u5831\u3092User\u30e2\u30c7\u30eb\u306b\u79fb\u884c<\/span>\r\n    <span class=\"no\">Profile<\/span><span class=\"p\">.<\/span><span class=\"nf\">each<\/span> <span class=\"k\">do<\/span> <span class=\"o\">|<\/span><span class=\"n\">profile<\/span><span class=\"o\">|<\/span>\r\n      <span class=\"n\">profile<\/span><span class=\"p\">.<\/span><span class=\"nf\">user<\/span><span class=\"p\">.<\/span><span class=\"nf\">update<\/span><span class=\"p\">(<\/span>\r\n        <span class=\"ss\">zipcode:         <\/span><span class=\"n\">profile<\/span><span class=\"p\">.<\/span><span class=\"nf\">zipcode<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">prefecture_code: <\/span><span class=\"n\">profile<\/span><span class=\"p\">.<\/span><span class=\"nf\">prefecture_code<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">city_code:       <\/span><span class=\"n\">profile<\/span><span class=\"p\">.<\/span><span class=\"nf\">city_code<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"ss\">address:         <\/span><span class=\"n\">profile<\/span><span class=\"p\">.<\/span><span class=\"nf\">address<\/span>\r\n      <span class=\"p\">)<\/span>\r\n    <span class=\"k\">end<\/span>\r\n\r\n    <span class=\"n\">drop_table<\/span> <span class=\"ss\">:profiles<\/span>\r\n  <span class=\"k\">end<\/span>\r\n<span class=\"k\">end<\/span>\r\n<\/code><\/pre>\n<h1>\u53ea\u6709\u5728\u9700\u8981Profile\u4fe1\u606f\u65f6\uff0c\u624d\u4f1a\u67e5\u9605Profile\u8868\u3002<\/h1>\n<pre class=\"post-pre\"><code>irb(main):010:0&gt; User.all.first.zipcode\r\n  User Load (0.3ms)  SELECT  \"users\".* FROM \"users\"  ORDER BY \"users\".\"id\" ASC LIMIT 1\r\n  Profile Load (0.1ms)  SELECT  \"profiles\".* FROM \"profiles\" WHERE \"profiles\".\"user_id\" = ? LIMIT 1  [[\"user_id\", 1]]\r\n=&gt; \"419-4284\"\r\n\r\nirb(main):011:0&gt; User.all.first.name\r\n  User Load (0.2ms)  SELECT  \"users\".* FROM \"users\"  ORDER BY \"users\".\"id\" ASC LIMIT 1\r\n=&gt; \"\u6728\u6751 \u512a\u8863\"\r\n<\/code><\/pre>\n<h1>\u63a5\u4e0b\u6765\u5e94\u8be5\u505a\u7684\u4e8b\u60c5\u662f\u4ec0\u4e48?<\/h1>\n<ul class=\"post-ul\">\u5fc5\u7136\u6027\u304c\u3042\u307e\u308a\u306a\u3044\u306e\u306b\u3001Profile\u306e\u60c5\u5831\u3092\u53c2\u7167\u3057\u3066\u3044\u308b\u90e8\u5206\u3092\u4fee\u6b63\u3059\u308b<\/ul>\n<h1>\u4ee3\u7801 (daima)<\/h1>\n<ul class=\"post-ul\">https:\/\/github.com\/kasei-san\/refactor_model<\/ul>\n<h1>\u8bf7\u53c2\u8003<\/h1>\n<p>\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u3092\u4f7f\u3063\u305f1:1\u95a2\u9023\u3067\u30ab\u30e9\u30e0\u6570\u306e\u591a\u3044\u30c6\u30fc\u30d6\u30eb\u3092\u5206\u5272\u3059\u308b &#8211; Hidden in Plain Sight<\/p>\n<p>\u5fc5\u305a1\u5bfe1\u3067\u3042\u308c\u3070\u3001\u308f\u3056\u308f\u3056\u95a2\u9023\u4ed8\u3051\u306a\u304f\u3066\u3082\u3001\u540c\u3058\u5024\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u3092\u4f7f\u3046\u3068\u3044\u3046\u65b9\u6cd5<\/p>\n<p>\u30bd\u30fc\u30b7\u30e3\u30eb\u30b2\u30fc\u30e0\u306e\u305f\u3081\u306eMySQL\u5165\u9580\u305d\u306e\uff12 &#8211; Technology of DeNA<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4ec0\u4e48\u65f6\u5019\u6709\u6548\uff1f 1\u3064\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u4e2d\u306b\u66f4\u65b0\/\u53c2\u7167\u983b\u5ea6\u304c\u9ad8\u3044\u30ab\u30e9\u30e0\u3068\u4f4e\u3044\u30ab\u30e9\u30e0\u304c\u6df7\u5728\u3057\u3066\u3044\u308b &nbsp; 1\u3064 [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-34582","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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