undefined local variable or method `confirmed_at' for #User

Question

I am using Rails 3. There is a possible duplicate here. But it did not solve my problem, neither did any other solution.

My migration is as follows

class         


        

Answer 1

Ok. I solved it. The migration is outdated. Generate new migration with same code but another name.

1.Run command:

rails g migration add_confirmable_to_devise_v1

2.In the migration file:

class AddConfirmableToDeviseV1 < ActiveRecord::Migration
  def change
    change_table(:users) do |t| 
      t.confirmable 
    end
    add_index  :users, :confirmation_token, :unique => true 
  end
end

3.Then

rake db:migrate