Fix : Login by username and reset password on Devise

user.rb

# Devise 3.4.1 and Rails 4.1.7 be carefull if you apply this method to authorize users to log in with username or email : https://github.com/plataformatec/devise/wiki/How-To:-Allow-users-to-sign-in-using-their-username-or-email-address

# Add this method on User model file

def self.find_first_by_auth_conditions(warden_conditions)
  # Note to_h method this must be used instead, reset password will failed
  # Future pull on devise will fix it : https://github.com/plataformatec/devise/pull/3162
  conditions = warden_conditions.dup.to_h
  if login = conditions.delete(:login)
    where(conditions).where(["lower(username) = :value OR lower(email) = :value", { :value => login.downcase }]).first
  else
    where(conditions).first
  end
end