从现有模型/数据库设计安装

我想知道如何为不同用户的现有数据库添加设计。 在这里,我已经有一个客户模型定义,我想改变以允许设计工作。

我已经创建了一个新的迁移并插入了代码

class AddDeviseToCustomer  false, :default => '', :limit => 128 t.confirmable t.recoverable t.rememberable t.trackable t.token_authenticatable t.timestamps end end end 

据此,它应该工作。 https://github.com/plataformatec/devise/wiki/How-To:-change-an-already-existing-table-to-add-devise-required-columns 。 但是当运行rake db:migrate时,我得到以下内容

 undefined method `confirmable' for # 

我运行了以下行

 rails g devise:install 

任何理由设计都不会认出来,我是否需要做一些事情来说客户是一个设计? 提前致谢

看起来文档已经过时了。

尝试使用设计生成器,它将创建相同的迁移,使用正确的参数,如果它是现有模型就可以了:

 rails g devise customer 

它应该创建AddDeviseToCustomers迁移

与此类似的东西:

 class AddDeviseToCustomers < ActiveRecord::Migration def self.up change_table(:customers) do |t| ## Database authenticatable t.string :email, :null => false, :default => "" t.string :encrypted_password, :null => false, :default => "" ## Recoverable t.string :reset_password_token t.datetime :reset_password_sent_at ## Rememberable t.datetime :remember_created_at ## Trackable t.integer :sign_in_count, :default => 0 t.datetime :current_sign_in_at t.datetime :last_sign_in_at t.string :current_sign_in_ip t.string :last_sign_in_ip ## Confirmable t.string :confirmation_token t.datetime :confirmed_at t.datetime :confirmation_sent_at t.string :unconfirmed_email # Only if using reconfirmable ## Lockable # t.integer :failed_attempts, :default => 0 # Only if lock strategy is :failed_attempts # t.string :unlock_token # Only if unlock strategy is :email or :both # t.datetime :locked_at ## Token authenticatable # t.string :authentication_token # Uncomment below if timestamps were not included in your original model. # t.timestamps end def self.down # By default, we don't want to make any assumption about how to roll back a migration when your # model already existed. Please edit below which fields you would like to remove in this migration. raise ActiveRecord::IrreversibleMigration end end 

请注意,没有更多的t.confirmable