{"id":469,"date":"2008-04-20T02:03:20","date_gmt":"2008-04-19T17:03:20","guid":{"rendered":"http:\/\/ecpplus.net\/weblog\/?p=469"},"modified":"2020-06-15T22:19:10","modified_gmt":"2020-06-15T13:19:10","slug":"rails","status":"publish","type":"post","link":"https:\/\/ecpplus.net\/weblog\/rails\/","title":{"rendered":"Rails\u306eModel\u3067\u5927\u91cf\u306e\u7d30\u304b\u3044\u30c7\u30fc\u30bf\u3092\u7ba1\u7406\u3057\u305f\u3044"},"content":{"rendered":"<p>\u30e2\u30c7\u30eb\u3067\u30ab\u30e9\u30e0\u3092 serialize \u3059\u308b\u3068\u4e2d\u306bRuby\u306e\u60c5\u5831\u3044\u308c\u3066\u304a\u3051\u308b\u306e\u3067\u3001\u3084\u305f\u3089\u9805\u76ee\u304c\u591a\u3044\u3068\u304d\u306b\u4fbf\u5229<\/p>\n<pre lang=\"ruby\">class User < ActiveRecord::Base\n  serialize :serialize_data  # seriarize_data \u3063\u3066\u3044\u3046\u3068\u3053\u306b\u305f\u304f\u3055\u3093\u3044\u308c\u308b\u3002\n\n  # \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n  # serialize_data\u3092 Hash\u306b\u3059\u308b\n  def initialize(*args)\n    super(*args)\n    self.serialize_data = {}\n  end\n\n  self::KOLUMNS = [:tall, :age, :weight]\n  # serialize_data \u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u60c5\u5831\u5168\u3066\u3092\u7ba1\u7406\u3059\u308b\n  # reader, writer \u3092\u5b9a\u7fa9\u3057\u3066\u30d5\u30a9\u30fc\u30e0\u3067\u6271\u3044\u6613\u304f\u3059\u308b\n  # serialize_data[\u30d5\u30a3\u30fc\u30eb\u30c9\u540d] \u3068\u3057\u3066\u30c7\u30fc\u30bf\u304c\u7ba1\u7406\u3055\u308c\u308b\n  KOLUMNS.each do |kolumn|\n    # reader \u3092\u5b9a\u7fa9\n    define_method kolumn do\n      self.serialize_data[kolumn]\n    end\n    # writer \u3092\u5b9a\u7fa9\n    define_method \"#{kolumn}=\" do |obj|\n      self.serialize_data[kolumn] = obj\n    end\n  end\nend<\/pre>\n<p>\u3053\u308c\u3067\u3001\u4f55\u767e\u3068\u304b\u3053\u307e\u3054\u307e\u3057\u305f\u30c7\u30fc\u30bf\u304c\u3042\u3063\u3066\u3082DB\u306e\u30ab\u30e9\u30e01\u3064\u3067\u5168\u90e8\u7ba1\u7406\u3067\u304d\u3066\u6c17\u6301\u3061\u3044\u3044\u30fc\u3002SQL\u7684\u306a\u691c\u7d22\u306f\u51fa\u6765\u306a\u3044\u306e\u3067\u3001\u691c\u7d22\u3057\u305f\u3044\u30ab\u30e9\u30e0\u304c\u3042\u3063\u305f\u3089\u3001\u305d\u306e\u90fd\u5ea6DB\u306b\u30ab\u30e9\u30e0\u3092\u8ffd\u52a0\u3057\u3066\u3044\u3051\u3070\u3088\u3044\u306e\u3067\u3001\u6c17\u8efd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30e2\u30c7\u30eb\u3067\u30ab\u30e9\u30e0\u3092 serialize \u3059\u308b\u3068\u4e2d\u306bRuby\u306e\u60c5\u5831\u3044\u308c\u3066\u304a\u3051\u308b\u306e\u3067\u3001\u3084\u305f\u3089\u9805\u76ee\u304c\u591a\u3044\u3068\u304d\u306b\u4fbf\u5229 class User < ActiveRecord::Base serialize :serialize_dat [&hellip;]\n<\/p>\n","protected":false},"author":1,"featured_media":2521,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43],"tags":[10],"class_list":["post-469","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-development","tag-rails"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/posts\/469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/comments?post=469"}],"version-history":[{"count":2,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/posts\/469\/revisions"}],"predecessor-version":[{"id":2561,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/posts\/469\/revisions\/2561"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/media\/2521"}],"wp:attachment":[{"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/media?parent=469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/categories?post=469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecpplus.net\/weblog\/wp-json\/wp\/v2\/tags?post=469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}