ruby-on-rails - 从现有模型/数据库设计安装

Question

我想知道如何将设计添加到具有不同用户的现有数据库中。在这里，我已经定义了一个客户模型，我想进行更改以允许设计对其进行处理。

我创建了一个新的迁移并插入了代码

class AddDeviseToCustomer < ActiveRecord::Migration
  def change
    change_table :customers do |t|
      #t.database_authenticatable
      t.string :encrypted_password, :null => false, :default => '', :limit => 128
      t.confirmable
      t.recoverable
      t.rememberable
      t.trackable
      t.token_authenticatable
      t.timestamps
    end
  end
end

根据这个，它应该可以工作。 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 我得到以下信息

undefined method `confirmable' for #<ActiveRecord::ConnectionAdapters::Table:0x9286a28>

我已经运行了以下行

rails g devise:install

任何设计都无法识别的原因，我是否需要做些什么来表明客户是设计？提前致谢

Answer 1

看起来该文档已过时。

尝试使用设计生成器，它会创建相同的迁移，并使用正确的参数，如果它是现有模型也没关系:

rails g devise customer

它应该创建 AddDeviseToCustomers 迁移

类似这样的东西:

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

注意没有更多的t.confirmable