设置验证规则的消息

Question

我有这个验证规则：

  validates :email, :presence => {:message => 'Email cannot be blank.'}, :allow_blank => true, :format => {:with => /\A[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]+\z/, :message => 'Email is not valid.'}, :uniqueness => true

我想为

设置自己的留言

validates :email, :presence => {:message => 'Email cannot be blank.'}, :allow_blank => true, :format => {:with => /\A[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]+\z/, :message => 'Email is not valid.'}, :uniqueness => {message: 'This email address has already been taken.'}

但是这只会生成默认消息已经被，而不是我在消息部分中定义的消息。如何定制？

由于