干活动记录模型验证

Question

尽管下面的代码段起作用，但我已经开始探索一种更好的干预方法。任何人都可以更好地了解如何构建它？我感谢您的帮助。

class User < ActiveRecord::Base 

    validates :remote_addr, :web_browser, :operating_system, presence: true 

    validates :age_verification, presence: { message: "You must be at least 18 years old to register for this application" } 

    validates :email_address, 
    allow_nil: false, 
    allow_blank: false, 
    presence: { message: "A valid email address is required" }, 
    uniqueness: { 
     case_sensitive: false, 
     message: "This email address has been previously registered" 
    }, 
    email_format: { 
     check_mx: true, 
     mx_message: "This email address has a bad domain", 
     message: "This email address must be formatted properly" 
    } 

end 

Answer 1

您可以：

1. 移动定制消息的I18n文件，更info，例如：

配置/区域设置/ en.yml

en: 
    errors: 
    attributes: 
     age_verification: 
     blank: 'You must be at least 18 years old to register for this application' 
     email_address: 
     blank: 'A valid email address is required' 

    activerecord: 
    errors: 
     messages: 
     invalid_email_address: 'This email address must be formatted properly' 
     email_address_not_routable: 'This email address has a bad domain' 

    activemodel: 
    errors: 
     messages: 
     invalid_email_address: 'This email address must be formatted properly' 
     email_address_not_routable: 'This email address has a bad domain' 

，并加入在场验证，age_verification，电子邮件字段与其他

在2验证：EMAIL_ADDRESS，真的有必要检查allow_nil和allow_blank和存在？由于验证电子邮件格式与它们重叠，即空白和零未被接受为有效值。对于数据一致性而言，使用数据库索引和列约束。

所以我是这样做：

validates_presence_of :remote_addr, :web_browser, 
         :operating_system, :age_verification, :email_address 

    validates :email_address, uniqueness: { case_sensitive: false }, 
          email_format: { check_mx: true } 

举动错误消息en.yml文件（见上文），并添加创建表迁移

change_column <tables>, :email, null: false 
add_index <tables>, :email, unique: true