How do I describe an enumeration column in a Rails 3 migration?

Question

How do I describe an enumeration column in a Rails 3 migration?

Answer 1

Rails 4.1 contains enum for now!

You can write just

class User < ActiveRecord::Base
  enum status: [ :admin, :user, :banned ]
end

For migration write

t.integer :status

Rails 3 & 4.0

Best solution in my opinion is simple_enum gem.