Question

I have already created a User Model using devise, but I now want to add support for token_authenticable, so I need to migrate these additions. Is the following correct, and what type should token_authenticatable be?

class AddAuthenticationTokenToUser < ActiveRecord::Migration

  def change

    add_column :users, :token_authenticatable
    add_index  :users, :authentication_token, :unique => true

  end

end

Answer 1

From the devise 2.0 generator (line 74) on Github:

# t.string :authentication_token

If you are going to be looking up a user based on their token, then adding an index is a good idea.

Here is the devise 1.5 file