ruby - "undefined method"用于 rails 模型

Question

我正在使用带有 Rails 的 Devise，我想添加一个方法“getAllComments”，所以我这样写:

    class User < ActiveRecord::Base
      # Include default devise modules. Others available are:
      # :token_authenticatable, :encryptable, :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, :remember_me, :city, :newsletter_register, :birthday, :postal_code,
          :address_complement, :address, :lastname, :firstname, :civility

      has_many :hotels_comments

      class << self # Class methods
          def getAllComments
             true
          end
      end
    end

在我的 Controller 中:

def dashboard
  @user = current_user
  @comments = @user.getAllComments();
end

当我访问我的 url 时，我得到了

 undefined method `getAllComments' for #<User:0x00000008759718>

我做错了什么？

谢谢

Answer 1

因为 getAllComments 是一个类方法，而您正试图将其作为实例方法访问。

您要么需要访问它:

User.getAllComments

或者重新定义为实例方法:

class User < ActiveRecord::Base
  #...

  def getAllComments
    true
  end
end

def dashboard
  @user = current_user
  @comments = @user.getAllComments
end