Question

Out of the box, the devise gem asks for a user’s email address and uses that to sign in (authenticate).

This railscast, “Customizing Devise”, describes clearly how one can authenticate with a username in lieu of an email. How would one configure devise to try to authenticate against two different columns, either username OR email?

Answer 1

You just need define the method find_for_database_authentication(conditions). By example, with monogid I do that :

  def self.find_for_database_authentication(conditions)
    self.where({ :login => conditions[:login] }).first || self.where({ :email => conditions[:login] }).first
  end