Devise migration on existing model

Question

I\'m migrating from Authlogic to Devise.

UPDATED:

The migration of devise tries to re-create the table users, so i changed as you can see below the create_

Answer 1

The error that you're getting is because you are trying to recreate the email field which you already have. The email field is created in the devise helper t.database_authenticatable. You can use your old user table with the new system, but you don't need to include t.database_authenticatable, you just need to rename your old field names. Looking in the Documentation for Devise, you can see that database_authenticatable just creates three fields: email, encrypted_password and password_salt. They are the same as the email, crypted_password, and password_salt that you already have in your authlogic user table, so you can use change_table like so:

def self.up
  change_table(:users) do |t|
    t.recoverable
    t.trackable
    # rememberable uses remember_token, but this field is different
    t.rename :remember_token_expires_at, :remember_created_at
    # these fields are named differently in devise
    t.rename :crypted_password, :encrypted_password
  end
end