"undefined method" for a rails model

Question

I am using Devise with rails and i want to add a method "getAllComments", so i write this :

    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

And in my controller :

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

And when i go to my url, i got

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

What i am doing wrong?

Thank you

Answer 1

Because getAllComments is a class method and you are attempting to access it as an instance method.

You either need to access it as:

User.getAllComments

or redefine it as an instance method:

class User < ActiveRecord::Base
  #...

  def getAllComments
    true
  end
end

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

Answer 2

As I can see, you make getAllComments as class method through addition it to eigenclass. And you try to call this method from instance.