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

Note for myself. Someone might find it helpful: What we need is 2 commands below:

    rake db:migrate:reset 
    rake db:reset

Voila! It works!