agenda-libre-ruby/app/models/user.rb

require 'digest/md5'

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, authentication_keys: [:login]
  #, :registerable, :validatable

  has_many :notes

  def encrypted_password=(pass)
    write_attribute :password, pass
  end

  def encrypted_password
    read_attribute :password
  end

  def self.find_first_by_auth_conditions(warden_conditions)
    conditions = warden_conditions.dup
    if login = conditions.delete(:login)
      where(conditions).where(["login = :value", { value: login }]).first
    else
      where(conditions).first
    end
  end

  def valid_password?(password)
    encrypted_password == password_digest(password)
  end

  protected
    def password_digest(password)
      Digest::MD5.hexdigest password
    end
end