在Rails应用程序中为Devise视图/模型添加其他字段和验证 [英] Adding additional field and validation to Devise view/model in Rails app

问题描述

我生成了默认的设计视图：

rails generate devise:views

然后我添加了用户名字段到 views / devise / registrations / new.html.erb 表单。

Then I added a username field to the views/devise/registrations/new.html.erb form.

目前，只有电子邮件和密码验证。如何验证用户名字段的存在和唯一性？我需要向用户模型添加东西吗？

Currently, only email and password validation occurs. How do I validate presence and uniqueness of the username field? Do I need to add something to the User model?

推荐答案

使用其他答案中提到的教程， Railscast＃210 和 Devise Wiki 。但是，据我所知，他们没有明确说明如何验证用户名字段的存在和/或唯一性。

I used both the of the tutorials mentioned in the other answers, Railscast #210 and the Devise Wiki. However, so far as I could tell they do not explicitly say how to validate the presence and/or uniqueness of the username field.

如果您添加了简单迁移的用户名 -

If you added username with a simple migration -

rails generate migration addUsernameToUser username:string

然后，devise不会对该字段做任何特殊的操作，所以你需要在用户模型中自行添加验证和唯一性检查。

Then devise doesn't do anything special with that field, so you need to add checks for validation and uniqueness yourself in the User model.

class User < ActiveRecord::Base
...
  validates_presence_of :username
  validates_uniqueness_of :username

但是，如果您查看RailsCast＃209，则有一个用于创建用户模型的迁移示例。

However, If you look at the RailsCast #209 there is an example of the migration used to create the User model.

class DeviseCreateUsers < ActiveRecord::Migration  
  def self.up  
    create_table(:users) do |t|  
      t.database_authenticatable :null => false  
      # t.confirmable  
      t.recoverable  
      t.rememberable  
      t.trackable  
      # t.lockable :lock_strategy => :failed_attempts, :unlock_strategy => :both  

      t.timestamps  
    end  

    add_index :users, :email,                :unique => true  
    # add_index :users, :confirmation_token,   :unique => true  
    add_index :users, :reset_password_token, :unique => true  
    # add_index :users, :unlock_token,         :unique => true  
  end  

  def self.down  
    drop_table :users  
  end  
end  

请注意，用户电子邮件被定义为唯一的。也许如果使用相同的语法添加用户名，那么设计魔法将会照顾到存在和唯一性。

Notice here that the users email is defined as being unique. Perhaps if username was added using this same syntax then devise magic would take care of presence and uniqueness.

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