named_scopeã™ã”ã™ãŽã‚‹(ãã®2) - リンゴã®æ°´ã‚„り？(ã¯ã¦ãª)named_scopeã¯å¼•æ•°ã‚‚å–れるã¨ã„ã†äº‹ã§ã™ã€‚ å‰å›žã¯Aクラスç‰ã®æ‹¬ã‚Šæ–¹ã§ã—ãŸãŒã€å¼•æ•°ã‚’å–ã£ã¦klass('A')ã®æ§˜ãªäº‹ãŒå‡ºæ¥ã¾ã™ã€‚ class Member < ActiveRecord::Base named_scope :klass, lambda {|klass| { :conditions => ['klass = ?', klass]} } end 下ã®æ§˜ã«ä½¿ãˆã¾ã™ã€‚ Member.klass 'A' # =>SELECT * FROM "members" WHERE (klass = 'A') Member.klass 'B' # =>SELECT * FROM "members" WHERE (klass = 'B') Member.klass 'C' # =>SELECT * FROM "members" WHERE (klass = 'C') # ã“ã‚Œã¯å›°ã‚‹ Me
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