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假设我有columns: name, mobile, email, card_num, etc.
检查重复的ActiveRecord和返回重复列名
的手机,电子邮件的模型User
,card_num不能重复。
validates_uniqueness_of :mobile
validates_uniqueness_of :email
validates_uniqueness_of :card_num
反正是有任何检查,顶多在ONE查询任何重复的记录,并返回重复列?
现有的记录:
name mobile email card_num
============================================
Mary 65666678 [email protected] A001
新记录1:
name mobile email card_num
============================================
Peter 65666678 [email protected] A002
将返回 “移动”
新纪录2:
name mobile email card_num
============================================
Peter 74009822 [email protected] A002
将返回 “电子邮件”
新记录3:
name mobile email card_num
============================================
Peter 65666678 [email protected] A001
在回报 “电子邮件”/ “移动”/ “card_num” 就行了。