è«–ç†å‰Šé™¤ã¨eager_loadã§N+1å•é¡ŒãŒç™ºç”Ÿã™ã‚‹ä»¶ · zephiransasã®ãƒãƒ©ã‚·ã®è£Railsアプリã«ã¦è«–ç†å‰Šé™¤ã¨eager_loadã‚’åˆã‚ã›ã¦ä½¿ã†ã¨N+1å•é¡ŒãŒç™ºç”Ÿã™ã‚‹ã“ã¨ã«æ°—ã¥ã„ãŸã®ã§ãƒ¡ãƒ¢ã€‚ N+1å•é¡Œã‚’確èªã™ã‚‹ ã¾ãšã¯N+1å•é¡ŒãŒèµ·ãるよã†ãªãƒ¢ãƒ‡ãƒ«ã‚’作æˆã—ã¾ã™ã€‚よãã‚るブãƒã‚°ã‚¢ãƒ—リã®ã‚ˆã†ãªã€ãƒ–ãƒã‚°ã®ã‚¨ãƒ³ãƒˆãƒªãŒã‚ã‚Šã€ãã‚Œã«ã‚³ãƒ¡ãƒ³ãƒˆãŒè¤‡æ•°ã‚るパターンã§ã™ã€‚ class Post < ActiveRecord::Base attr_accessible :title, :content has_many :comments end class Comment < ActiveRecord::Base attr_accessible :post_id, :name, :content belongs_to :post end é©å½“ãªãƒ‡ãƒ¼ã‚¿ã‚’入れãŸå¾Œã€ã“ã‚Œã«å¯¾ã—ã¦rails cã§ä»¥ä¸‹ã®ã‚ˆã†ã«ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’å–å¾—ã—ã¾ã™ã€‚ Post.all.each do |post| puts po
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