8. ActiveRecord::Base.normalizes で正規化
before
after
1 class User < ActiveRecord::Base
2 before_validation :normalize_email
3
4 private
5
6 def normalize_email
7 email.strip.downcase
8 end
9 end
1 class User < ActiveRecord::Base
2 normalizes :email, with: -> email { email.strip.downcase }
3 end