{"id":8844,"date":"2016-09-20T11:16:25","date_gmt":"2016-09-20T11:16:25","guid":{"rendered":"https:\/\/dev.railscarma.com\/usage-sql-nosql-databases-single-rails-application\/"},"modified":"2021-06-06T11:29:09","modified_gmt":"2021-06-06T11:29:09","slug":"usage-sql-nosql-databases-single-rails-application","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/%e6%8a%80%e8%a1%93%e8%ab%96%e6%96%87\/usage-sql-nosql-databases-single-rails-application\/","title":{"rendered":"\u5358\u4e00\u306e Rails \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3 (MySQL\u3001PostgreSQL\u3001MongoDB) \u3067\u306e SQL \u304a\u3088\u3073 NoSQL \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4f7f\u7528"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"8844\" class=\"elementor elementor-8844\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5a734cd5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5a734cd5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-504b0dab\" data-id=\"504b0dab\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2486cd25 elementor-widget elementor-widget-text-editor\" data-id=\"2486cd25\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tRuby on Rails \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u542b\u3081\u308b\u3053\u3068\u3092\u691c\u8a0e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u306b\u306f\u3001\u7279\u6709\u306e\u7406\u7531\u304c\u3042\u308a\u307e\u3059\u3002\u79c1\u306e\u72b6\u6cc1\u3067\u306f\u3001\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u307e\u3057\u305f\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f MySQL \u3067\u3042\u308b\u3068\u8003\u3048\u3066\u304f\u3060\u3055\u3044\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306edatabase.yml\u30d5\u30a1\u30a4\u30eb\u306b\u3001\u901a\u5e38\u306e\u65b9\u6cd5\u3067MySQL\u306e\u63a5\u7d9a\u3092\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u540c\u3058\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5185\u3067 postgresql \u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u3001\u30ab\u30b9\u30bf\u30e0 \u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\n\n<strong>postgresql\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u30ab\u30b9\u30bf\u30e0\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b<\/strong>\n\n\u3068\u3044\u3046 2 \u756a\u76ee\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3057\u307e\u3059\u3002 <strong>\u300c\u7d71\u8a08\u300d<\/strong>\n\n\u307e\u305a\u306f\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059 <strong>config\/database_stats.yml<\/strong> \u305d\u3057\u3066\u3001\u30d7\u30e9\u30a4\u30de\u30ea \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u6210\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u5408\u3068\u540c\u3058\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\n\n<strong>\u767a\u9054\uff1a<\/strong>\n<strong>\u00a0 \u30a2\u30c0\u30d7\u30bf\u30fc: postgresql<\/strong>\n<strong>\u00a0 \u30a8\u30f3\u30b3\u30fc\u30c9: utf8<\/strong>\n<strong>\u00a0 \u518d\u63a5\u7d9a: false<\/strong>\n<strong>\u00a0 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9: db_info_development<\/strong>\n<strong>\u00a0 \u30d7\u30fc\u30eb: 5<\/strong>\n<strong>\u00a0 \u30db\u30b9\u30c8: \u30ed\u30fc\u30ab\u30eb\u30db\u30b9\u30c8<\/strong>\n<strong>\u00a0 \u30e6\u30fc\u30b6\u30fc\u540d: postgres<\/strong>\n<strong>\u00a0 \u30d1\u30b9\u30ef\u30fc\u30c9\uff1a<\/strong>\n\n\u6b21\u306b\u3001\u30b9\u30ad\u30fc\u30de\u3068\u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u3059\u3079\u3066\u306e\u79fb\u884c\u3092\u4fdd\u6301\u3059\u308b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u540d\u524d\u3092\u4ed8\u3051\u3066\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u4f5c\u6210\u3059\u308b <strong>db_stats<\/strong> Rails \u30eb\u30fc\u30c8\u306b\u79fb\u52d5\u3057\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u69cb\u9020\u3092\u30b3\u30d4\u30fc\u3057\u307e\u3059\u3002\n\n<strong>\u2013db<\/strong>\n<strong>\u00a0 \u2013\u79fb\u884c<\/strong>\n<strong>\u00a0 \u30b9\u30ad\u30fc\u30de.rb<\/strong>\n<strong>\u00a0 \u7a2e\u5b50.rb<\/strong>\n<strong>\u2013db_stats<\/strong>\n<strong>\u00a0 \u2013\u79fb\u884c<\/strong>\n<strong>\u00a0 \u30b9\u30ad\u30fc\u30de.rb<\/strong>\n<strong>\u00a0 \u7a2e\u5b50.rb<\/strong>\n\n\u4f5c\u6210\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u306f\u7a7a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\n\n<strong>Rake\u30bf\u30b9\u30af\u306e\u8ffd\u52a0<\/strong>\n\n\u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u51e6\u7406\u3059\u308b\u306b\u306f\u3001\u4f5c\u6210\u3001\u79fb\u884c\u3001\u305d\u306e\u4ed6\u306e\u6a5f\u80fd\u306e\u305f\u3081\u306e\u30ab\u30b9\u30bf\u30e0 \u30bf\u30b9\u30af\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b<strong> lib\/tasks\/db_stats.rake<\/strong> \u4ee5\u4e0b\u306e\u5185\u5bb9\u3067\n\n<strong>\u540d\u524d\u7a7a\u9593:stats \u304c\u884c\u3046\u3053\u3068<\/strong>\n\n<strong>\u00a0 \u540d\u524d\u7a7a\u9593 :db \u306f |ns| \u3092\u5b9f\u884c\u3057\u307e\u3059<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u30c9\u30ed\u30c3\u30d7\u30c9\u30a5<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:drop\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u4f5c\u6210\u3059\u308b<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:create\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u5b9f\u884c<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:setup\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u79fb\u884c\u5b9f\u884c<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:\u79fb\u884c\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u5b9f\u884c<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:rollback\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u30b7\u30fc\u30c9\u30c9\u30fc<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:seed\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u30d0\u30fc\u30b8\u30e7\u30f3\u5b9f\u884c<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:version\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u540d\u524d\u7a7a\u9593:\u30b9\u30ad\u30fc\u30de\u5b9f\u884c<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u30ed\u30fc\u30c9\u5b9f\u884c<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:schema:load\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u30c0\u30f3\u30d7\u5b9f\u884c<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:schema:dump\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 \u540d\u524d\u7a7a\u9593:\u30c6\u30b9\u30c8\u5b9f\u884c<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 \u30bf\u30b9\u30af:\u6e96\u5099\u3092\u3059\u308b<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cdb:test:prepare\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 # \u4e0a\u3067\u5b9a\u7fa9\u3057\u305f\u3059\u3079\u3066\u306e\u30bf\u30b9\u30af\u306b\u9069\u5207\u306a\u30bf\u30b9\u30af\u3092\u8ffd\u52a0\u304a\u3088\u3073\u5148\u982d\u306b\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/strong>\n<strong>\u00a0\u00a0\u00a0 ns.tasks.each \u306f |task| \u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 task.enhance [\u201cstats:set_custom_config\u201d] \u3092\u5b9f\u884c\u3057\u307e\u3059<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Rake::Task[\u201cstats:revert_to_original_config\u201d].invoke<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u7d42\u308f\u308a<\/strong>\n<strong>\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0 \u30bf\u30b9\u30af:set_custom_config \u3092\u5b9f\u884c\u3057\u307e\u3059<\/strong>\n<strong>\u00a0\u00a0\u00a0 # \u73fe\u5728\u306e\u5909\u6570\u3092\u4fdd\u5b58\u3057\u307e\u3059<\/strong>\n<strong>\u00a0\u00a0\u00a0 @original_config = {<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 env_schema: ENV[&#039;SCHEMA&#039;],<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 \u69cb\u6210: Rails.application.config.dup<\/strong>\n<strong>\u00a0\u00a0\u00a0 }<\/strong>\n\n<strong>\u00a0\u00a0\u00a0 # \u30ab\u30b9\u30bf\u30e0 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u6210\u5909\u6570\u3092\u8a2d\u5b9a\u3057\u307e\u3059<\/strong>\n<strong>\u00a0\u00a0\u00a0 ENV[&#039;SCHEMA&#039;] = \u201cdb_stats\/schema.rb\u201d<\/strong>\n<strong>\u00a0\u00a0\u00a0 Rails.application.config.paths[&#039;db&#039;] = [\u201cdb_stats\u201d]<\/strong>\n<strong>\u00a0\u00a0\u00a0 Rails.application.config.paths[&#039;db\/\u79fb\u884c&#039;] = [\u201cdb_stats\/\u79fb\u884c\u201d]<\/strong>\n<strong>\u00a0\u00a0\u00a0 Rails.application.config.paths[&#039;db\/seeds&#039;] = [\u201cdb_stats\/seeds.rb\u201d]<\/strong>\n<strong>\u00a0\u00a0\u00a0 Rails.application.config.paths[&#039;config\/database&#039;] = [\u201cconfig\/database_stats.yml\u201d]<\/strong>\n<strong>\u00a0 \u7d42\u308f\u308a<\/strong>\n\n<strong>\u00a0 \u30bf\u30b9\u30af:revert_to_original_config \u3092\u5b9f\u884c\u3057\u307e\u3059<\/strong>\n<strong>\u00a0\u00a0\u00a0 # \u8a2d\u5b9a\u5909\u6570\u3092\u5143\u306e\u5024\u306b\u30ea\u30bb\u30c3\u30c8\u3057\u307e\u3059<\/strong>\n<strong>\u00a0\u00a0\u00a0 ENV[&#039;SCHEMA&#039;] = @original_config[:env_schema]<\/strong>\n<strong>\u00a0\u00a0\u00a0 Rails.application.config = @original_config[:config]<\/strong>\n<strong>\u00a0 \u7d42\u308f\u308a<\/strong>\n<strong>\u7d42\u308f\u308a<\/strong>\n\n\u3053\u306e\u8a2d\u5b9a\u304c\u3059\u3079\u3066\u5b8c\u4e86\u3057\u305f\u3089\u3001\u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u3057\u3001\u6700\u521d\u306e\u79fb\u884c\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002\n<blockquote><strong>$ \u30ec\u30fc\u30ad\u7d71\u8a08:db:\u4f5c\u6210<\/strong>\n<strong> $ \u30ec\u30fc\u30ad\u7d71\u8a08:db:\u79fb\u884c<\/strong><\/blockquote>\n\u3053\u308c\u306b\u3088\u308a\u3001\u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9 \u30b9\u30ad\u30fc\u30de \u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002 <strong>db_stats\/schema.rb.<\/strong>\n\n\u30ab\u30b9\u30bf\u30e0\u79fb\u884c\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u30fc\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002\u30d1\u30b9\u304c\u30cf\u30fc\u30c9\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001Rails \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u30fc\u306f\u4f7f\u7528\u3067\u304d\u307e\u305b\u3093\u3002 <strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\/\u79fb\u884c<\/strong>\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u3059\u3079\u3066\u306e\u79fb\u884c\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u30ab\u30b9\u30bf\u30e0 \u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u30fc\u304c\u5fc5\u8981\u3067\u3059\u3002\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3059 <strong>lib\/generators\/stats_migration_generator.rb<\/strong> \u6b21\u306e\u30b3\u30fc\u30c9\u3092\u8cbc\u308a\u4ed8\u3051\u307e\u3059\u3002 <strong>&#039;rails\/generators\/active_record\/migration\/migration_generator&#039;<\/strong>\n\n<strong>\u30af\u30e9\u30b9 StatsMigrationGenerator &lt; ActiveRecord::Generators::MigrationGenerator<\/strong>\n<strong>source_root File.join(File.dirname(ActiveRecord::Generators::MigrationGenerator.instance_method(:create_migration_file) .source_location.first), \u201ctemplates\u201d)<\/strong>\n\n<strong>\u00a0 def create_migration_file<\/strong>\n<strong>\u00a0\u00a0\u00a0 set_local_assigns!<\/strong>\n<strong>\u00a0\u00a0\u00a0 \u30d5\u30a1\u30a4\u30eb\u540d\u3092\u691c\u8a3c\u3057\u3066\u304f\u3060\u3055\u3044!<\/strong>\n<strong>\u00a0\u00a0\u00a0 migration_template @migration_template\u3001\u300cdb_stats\/\u79fb\u884c\/#{\u30d5\u30a1\u30a4\u30eb\u540d}.rb\u300d<\/strong>\n<strong>\u00a0 \u7d42\u308f\u308a<\/strong>\n<strong>\u7d42\u308f\u308a<\/strong>\n\n\u3053\u308c\u3092\u3059\u3079\u3066\u6e96\u5099\u3059\u308b\u3068\u3001\u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u79fb\u884c\u3092\u751f\u6210\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\n<blockquote><strong>$ \u30ec\u30fc\u30eb g stats_migration \u79fb\u884c\u540d<\/strong><\/blockquote>\n\u3053\u306e\u79fb\u884c\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u79fb\u884c\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002 <strong>db_stats\/\u79fb\u884c\u3002<\/strong>\n\n\u305d\u306e\u5f8c\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u79fb\u884c\u3057\u307e\u3059\u3002\n<blockquote><strong>$ \u30ec\u30fc\u30ad\u7d71\u8a08:db:\u79fb\u884c<\/strong><\/blockquote>\n\u63a5\u7d9a\u3068\u30e2\u30c7\u30eb\u3092\u5b8c\u6210\u3055\u305b\u308b <strong>PostgreSQL<\/strong>\n\u3082\u3046\u3059\u3050\u7d42\u308f\u308a\u307e\u3059\u3002\u65b0\u3057\u3044\u521d\u671f\u5316\u30d5\u30a1\u30a4\u30eb\u3092\u8ffd\u52a0\u3059\u308b <strong>config\/initializers\/db_stats.rb<\/strong> \u305d\u3057\u3066\u4ee5\u4e0b\u3092\u8cbc\u308a\u4ed8\u3051\u307e\u3059:\n<blockquote><strong># \u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u8a2d\u5b9a\u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u4fdd\u5b58\u3057\u307e\u3059<\/strong>\n\n<strong>DB_STATS = YAML::load(ERB.new(File.read(Rails.root.join(\u201cconfig\u201d,\u201ddatabase_stats.yml\u201d))).result)[Rails.env]<\/strong><\/blockquote>\n<strong>mongodb \u306e\u69cb\u6210:<\/strong>\n\nMongoid gem \u306f\u3001Ruby \u306e MongoDB \u7528\u306e ODM (Object-Document-Mapper) \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3059\u3002\n<blockquote><strong>gem &#039;mongoid&#039;, &#039;~&gt; 5.1.0&#039;<\/strong><\/blockquote>\n\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf\u30fc\u3092\u5b9f\u884c\u3059\u308b\u3068\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3067\u304d\u307e\u3059\u3002 Mongoid \u306f\u305d\u3053\u304b\u3089\u4ed6\u306e\u3059\u3079\u3066\u3092\u51e6\u7406\u3057\u307e\u3059\u3002\n<blockquote><strong>$ \u30ec\u30fc\u30eb g mongoid:config<\/strong><\/blockquote>\n\u305d\u308c\u304b\u3089\u305d\u308c\u306f\u4f5c\u6210\u3057\u307e\u3059<strong> \u30e2\u30f3\u30b4\u30a4\u30c9.yml<\/strong> \u4ee5\u4e0b\u306e\u3088\u3046\u306b\n\n<strong>\u767a\u9054\uff1a<\/strong>\n<strong>\u00a0\u00a0 \u00a0\u30af\u30e9\u30a4\u30a2\u30f3\u30c8:<\/strong>\n<strong>\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u30c7\u30d5\u30a9\u30eb\u30c8\uff1a<\/strong>\n<strong>\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9: \u30e2\u30f3\u30b4\u30a4\u30c9<\/strong>\n<strong>\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u30db\u30b9\u30c8:<\/strong>\n<strong>\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0-\u30ed\u30fc\u30ab\u30eb\u30db\u30b9\u30c8:27017<\/strong>\n\n\u3053\u308c\u3067\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3001 <strong>MySQL<\/strong>, <strong>\u30dd\u30b9\u30c8\u30b0\u30ecSQL<\/strong> \u305d\u3057\u3066 <strong>\u30e2\u30f3\u30b4\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9<\/strong>\n\n\u30e6\u30fc\u30b6\u30fc\u3001\u88fd\u54c1\u3001\u30a4\u30e1\u30fc\u30b8\u3068\u3044\u3046 3 \u3064\u306e\u30e2\u30c7\u30eb\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u3089 3 \u3064\u306e\u30e2\u30c7\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5185\u3067\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u63a5\u7d9a\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002 MySQL\u63a5\u7d9a\u3092\u4f7f\u7528\u3057\u305f\u30e6\u30fc\u30b6\u30fc\u30e2\u30c7\u30eb\n\n<strong>\u30af\u30e9\u30b9 \u30e6\u30fc\u30b6\u30fc &lt; ActiveRecord::Base<\/strong>\n<strong>\u7d42\u308f\u308a<\/strong>\n\n<strong>$ \u30ec\u30fc\u30eb g \u79fb\u884c create_users field_names<\/strong>\n\n<strong>rake db:\u79fb\u884c<\/strong>\n\n\u3053\u306e\u79fb\u884c\u30d5\u30a1\u30a4\u30eb\u306f db\/merge \u306e\u4e0b\u306b\u4f5c\u6210\u3055\u308c\u3001MySQL \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4e0b\u306b\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002\n\n<strong>\u30af\u30e9\u30b9 Product &lt; ActiveRecord::Base<\/strong>\n<strong>\u00a0\u00a0 \u00a0\u63a5\u7d9a\u78ba\u7acb DB_STATS<\/strong>\n<strong>\u7d42\u308f\u308a<\/strong>\n\n<strong>$ \u30ec\u30fc\u30eb g stats_migration create_products<\/strong>\n<strong>\u00a0\u00a0\u00a0\u00a0\u00a0 db_stats\/\u79fb\u884c\/20151201191642_create_products.rb \u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/strong>\n\n\u3053\u306e\u79fb\u884c\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u7d71\u8a08\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u79fb\u884c\u30c7\u30a3\u30ec\u30af\u30c8\u30ea db_stats\/merge \u306b\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002\n\n<strong>\u30af\u30e9\u30b9\u30a4\u30e1\u30fc\u30b8<\/strong>\n<strong>\u00a0\u00a0 \u00a0Mongoid::Document \u3092\u542b\u3081\u308b<\/strong>\n\n<strong>\u00a0\u00a0 \u00a0\u30d5\u30a3\u30fc\u30eb\u30c9:\u540d\u524d\u3001\u30bf\u30a4\u30d7:\u6587\u5b57\u5217<\/strong>\n<strong>\u00a0\u00a0 \u00a0\u30d5\u30a3\u30fc\u30eb\u30c9:\u8aac\u660e\u3001\u30bf\u30a4\u30d7:\u6587\u5b57\u5217<\/strong>\n<strong>\u7d42\u308f\u308a<\/strong>\n\nmongodb \u306f\u79fb\u884c\u3092\u5b9f\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002 <strong>ODM<\/strong>\u3002\u3053\u306e\u30c7\u30fc\u30bf\u306f\u4ee5\u4e0b\u3067\u4f5c\u6210\u3055\u308c\u3066\u3044\u307e\u3059 <strong>\u30e2\u30f3\u30b4DB\u3002<\/strong>\n\n\u304a\u6c17\u8efd\u306b <a href=\"\/ja\/%e3%81%8a%e5%95%8f%e3%81%84%e5%90%88%e3%82%8f%e3%81%9b\/\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a> \u3054\u8cea\u554f\u304c\u3054\u3056\u3044\u307e\u3057\u305f\u3089\u3002\n<div class=\"author-info\"><strong>\u30ab\u30c8\u30cd\u30cb\u30fb\u30ca\u30ac\u30fb\u30b5\u30a4\u30fb\u30c6\u30b8\u30e3\u30b9\u30a6\u30a3<\/strong><\/div>\n<div class=\"author-info\"><strong>\u30b7\u30cb\u30a2 \u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u8005<\/strong><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2af19d6c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2af19d6c\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6099c050\" data-id=\"6099c050\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1d11eaed elementor-widget elementor-widget-heading\" data-id=\"1d11eaed\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u6700\u65b0\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u8cfc\u8aad\u3059\u308b<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b234b2e elementor-widget elementor-widget-shortcode\" data-id=\"4b234b2e\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\t\t\t\t\t<script type=\"text\/javascript\">\n\t\t\t\t\t\tvar gCaptchaSibWidget;\n                        var onloadSibCallbackInvisible = function () {\n\n                            var element = document.getElementsByClassName('sib-default-btn');\n                            var countInvisible = 0;\n                            var indexArray = [];\n                            jQuery('.sib-default-btn').each(function (index, el) {\n                                if ((jQuery(el).attr('id') == \"invisible\")) {\n                                    indexArray[countInvisible] = index;\n                                    countInvisible++\n                                }\n                            });\n\n                            jQuery('.invi-recaptcha').each(function (index, el) {\n                                grecaptcha.render(element[indexArray[index]], {\n                                    'sitekey': jQuery(el).attr('data-sitekey'),\n                                    'callback': sibVerifyCallback,\n                                });\n                            });\n                        };\n\t\t\t\t\t<\/script>\n\t\t\t\t\t                <script src=\"https:\/\/www.google.com\/recaptcha\/api.js?onload=onloadSibCallbackInvisible&render=explicit\" async defer><\/script>\n\t\t\t\t\n\t\t\t<form id=\"sib_signup_form_1\" method=\"post\" class=\"sib_signup_form\" action=\"\">\n\t\t\t\t<div class=\"sib_loader\" style=\"display:none;\"><img\n\t\t\t\t\t\t\tsrc=\"https:\/\/www.railscarma.com\/wp-includes\/images\/spinner.gif\" alt=\"\u30ed\u30fc\u30c0\"><\/div>\n\t\t\t\t<input type=\"hidden\" name=\"sib_form_action\" value=\"subscribe_form_submit\">\n\t\t\t\t<input type=\"hidden\" name=\"sib_form_id\" value=\"1\">\n                <input type=\"hidden\" name=\"sib_form_alert_notice\" value=\"Please fill out this field\">\n                <input type=\"hidden\" name=\"sib_form_invalid_email_notice\" value=\"Your email address is invalid\">\n                <input type=\"hidden\" name=\"sib_security\" value=\"8dced0a366\">\n\t\t\t\t<div class=\"sib_signup_box_inside_1\">\n\t\t\t\t\t<div style=\"\/*display:none*\/\" class=\"sib_msg_disp\">\n\t\t\t\t\t<\/div>\n                                            <div id=\"sib_captcha_invisible\" class=\"invi-recaptcha\" data-sitekey=\"6LdikOAaAAAAAJ6SWrrKVQrtw7TQpQAEnv0HS0G3\"><\/div>\n                    \t\t\t\t\t<p class=\"sib-email-area\">\r\n    <label class=\"sib-email-area\"><\/label>\r\n    <input type=\"email\" class=\"sib-email-area\" name=\"email\" required=\"required\" placeholder=\"\u96fb\u5b50\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\">\r\n<\/p>\r\n<p class=\"sib-NAME-area\">\r\n    <label class=\"sib-NAME-area\"><\/label>\r\n    <input type=\"text\" class=\"sib-NAME-area\" name=\"NAME\" placeholder=\"\u540d\u524d\">\r\n<\/p>\r\n<p>\r\n    <input type=\"submit\" id=\"invisible\" class=\"sib-default-btn\" value=\"\u8cfc\u8aad\u3059\u308b\">\r\n<\/p>\t\t\t\t<\/div>\n\t\t\t<input type=\"hidden\" name=\"trp-form-language\" value=\"ja\"\/><\/form>\n\t\t\t<style>\n\t\t\t\tform#sib_signup_form_1 p.sib-alert-message {\n    padding: 6px 12px;\n    margin-bottom: 20px;\n    border: 1px solid transparent;\n    border-radius: 4px;\n    -webkit-box-sizing: border-box;\n    -moz-box-sizing: border-box;\n    box-sizing: border-box;\n}\nform#sib_signup_form_1 p.sib-alert-message-error {\n    background-color: #f2dede;\n    border-color: #ebccd1;\n    color: #a94442;\n}\nform#sib_signup_form_1 p.sib-alert-message-success {\n    background-color: #dff0d8;\n    border-color: #d6e9c6;\n    color: #3c763d;\n}\nform#sib_signup_form_1 p.sib-alert-message-warning {\n    background-color: #fcf8e3;\n    border-color: #faebcc;\n    color: #8a6d3b;\n}\n\t\t\t<\/style>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t  <div class=\"related-post slider\">\r\n        <div class=\"headline\">\u95a2\u9023\u8a18\u4e8b<\/div>\r\n    <div class=\"post-list owl-carousel\">\r\n\r\n            <div class=\"item\">\r\n            <div class=\"thumb post_thumb\">\r\n    <a  title=\"\u30ab\u30df\u30ca\u30ea\u30b8\u30a7\u30e0\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/%e6%8a%80%e8%a1%93%e8%ab%96%e6%96%87\/%e3%82%ab%e3%83%9f%e3%83%8a%e3%83%aa%e3%82%b8%e3%82%a7%e3%83%a0\/?related_post_from=37277\">\r\n\r\n      <img decoding=\"async\" width=\"800\" height=\"300\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2023\/04\/kaminari-gem.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"\u30ab\u30df\u30ca\u30ea\u30b8\u30a7\u30e0\" srcset=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2023\/04\/kaminari-gem.jpg 800w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2023\/04\/kaminari-gem-300x113.jpg 300w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2023\/04\/kaminari-gem-768x288.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\r\n\r\n    <\/a>\r\n  <\/div>\r\n\r\n  <a class=\"title post_title\"  title=\"\u30ab\u30df\u30ca\u30ea\u30b8\u30a7\u30e0\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/%e6%8a%80%e8%a1%93%e8%ab%96%e6%96%87\/%e3%82%ab%e3%83%9f%e3%83%8a%e3%83%aa%e3%82%b8%e3%82%a7%e3%83%a0\/?related_post_from=37277\">\r\n        \u30ab\u30df\u30ca\u30ea\u30b8\u30a7\u30e0  <\/a>\r\n\r\n        <\/div>\r\n              <div 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\u3067\u3042\u308b\u3068\u8003\u3048\u3066\u304f\u3060\u3055\u3044\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306edatabase.yml\u30d5\u30a1\u30a4\u30eb\u306b\u3001\u901a\u5e38\u306e\u65b9\u6cd5\u3067MySQL\u306e\u63a5\u7d9a\u3092\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u540c\u3058\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5185\u3067 postgresql \u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u3001\u30ab\u30b9\u30bf\u30e0 \u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 postgresql \u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u30ab\u30b9\u30bf\u30e0 \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9 \u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002 \u300cStats\u300d\u3068\u3044\u3046\u540d\u524d\u306e 2 \u756a\u76ee\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3057\u307e\u3059\u3002 \u307e\u305a\u3001\u30d5\u30a1\u30a4\u30eb config\/database_stats.yml \u3092\u4f5c\u6210\u3057\u3001\u30d7\u30e9\u30a4\u30de\u30ea \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u6210\u30d5\u30a1\u30a4\u30eb\u3068\u540c\u69d8\u306b\u30c7\u30fc\u30bf\u3092\u5165\u529b\u3057\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059: \u958b\u767a: \u30a2\u30c0\u30d7\u30bf\u30fc: postgresql \u2026<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.railscarma.com\/ja\/%e3%83%96%e3%83%ad%e3%82%b0\/how-to-build-a-scalable-saas-platform-using-ruby-on-rails\/\"> <span class=\"screen-reader-text\">Ruby on Rails\u3092\u4f7f\u3063\u3066\u30b9\u30b1\u30fc\u30e9\u30d6\u30eb\u306aSaaS\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u65b9\u6cd5<\/span> \u3082\u3063\u3068\u8aad\u3080 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