Question

我正在尝试在我的应用中添加身份验证系统，当我运行“rake db：migrate”时，我遇到了这个错误：

NoMethodError: undefined method `attr_accessible' for User (call 'User.connection' to establish a connection):Class
/Users/liferaymac/Desktop/check/app/models/user.rb:8:in `<class:User>'
/Users/liferaymac/Desktop/check/app/models/user.rb:1:in `<top (required)>'
/Users/liferaymac/Desktop/check/config/routes.rb:2:in `block in <top (required)>'
/Users/liferaymac/Desktop/check/config/routes.rb:1:in `<top (required)>'
/Users/liferaymac/Desktop/check/config/environment.rb:5:in `<top (required)>'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)

这是我的user.rb文件的视图，这是我的模型：

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
     :recoverable, :rememberable, :trackable, :validatable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :email, :password, :password_confirmation
end

这是我的迁移文件：

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

# migration
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

我在http://railscasts.com/episodes/209-introducing-devise?autoplay=true工作我也运行了bundle install并且已经安装了devise gem。任何见解将不胜感激。

Answer 1

来自Rails指南：

Rails 4.0已删除了attr_accessible和attr_protected功能赞成强参数。您可以使用Protected Attributes gem 为了顺利升级路径。

来源：http://guides.rubyonrails.org/upgrading_ruby_on_rails.html

您可能希望保留attr_accessible方法，否则在使用注册表单创建用户时会遇到错误。您可以捆绑protected_attributes gem，以便访问模型中的这些方法。

受保护的属性：https://github.com/rails/protected_attributes

Answer 2

我意识到在Rails 4+中没有＆＃34; attr_accessible＆＃34;。我从模型中删除了它，现在它可以工作了。（应该从一个旧视频中预料到这一点......）

rails undefined方法`attr_accessible'

2 个答案: