幹活動記錄模型驗證

Question

儘管下面的代碼段起作用，但我已經開始探索一種更好的干預方法。任何人都可以更好地瞭解如何構建它？我感謝您的幫助。

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. 移動定製消息的I18n文件，更info，例如：

配置/區域設置/ 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' 

，並加入在場驗證，age_verification，電子郵件字段與其他

在2驗證：EMAIL_ADDRESS，真的有必要檢查allow_nil和allow_blank和存在？由於驗證電子郵件格式與它們重疊，即空白和零未被接受爲有效值。對於數據一致性而言，使用數據庫索引和列約束。

所以我是這樣做：

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 } 

舉動錯誤消息en.yml文件（見上文），並添加創建表遷移

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