“{{attribute}} {{message}}”.

 validates_length_of       :certificateno,    :within => 18..18 ,:message=>"身份证号长度须为18位数! " 

验证效果不佳：字段验证的时候出现“{{attribute}} {{message}}”.

1 errors prohibited this order from being saved 
There were problems with the following fields: 

{{attribute}} {{message}}

解决方法：在CN里配置：

 activerecord:
      models:
        user: "用户"    
        rcrm_lead: "申请表"
      attributes:
        user:
          email: "电子邮件"
          name: "真实姓名"
          position: "职称"
          phone: "固话"
          mobile: "手机"
          field: "研究领域"
          address: "地址"
          post: "邮编"  
          password: "密码"
          password_confirmation: "密码确认"
        rcrm_lead:
          certificateno: "身份证号码"  
        contribution:
          kind: "类型"
          title: "论文题目"
          title_2nd: "English Title"
          abstract_2nd: "English Abstract"
          short_title: "短标题"
          abstract: "摘要"
          field: "领域"
          
      errors:
        full_messages:  
          format: "%{attribute} %{message}"
        messages:
          blank: "不能为空"
          confirmation: "与重复值不符合"
          invalid: "是无效的"  
          taken: "已经被使用"
          too_short: "太短"
          not_a_number: "不是数字"
        template:
          header:
            one: "有一个错误"
            other: "有{{count}}个错误"
          body: "以下错误信息"