Adding Layouts to Devise Views

Add following code to your Devise.rb file

# append to end of config/initializers/devise.rb
Rails.application.config.to_prepare do
  Devise::SessionsController.layout "devise"
  Devise::RegistrationsController.layout proc { |controller| user_signed_in? ? "application" : "devise" }
  Devise::ConfirmationsController.layout "devise"
  Devise::UnlocksController.layout "devise"
  Devise::PasswordsController.layout "devise"
end

Adding Password Complexity Validations To Devise

Here we have a typical Devise user model. What’s new is the password complexity validation.

class User < ActiveRecord::Base
  devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable
  attr_accessible :email, :password, :password_confirmation, :remember_me,

  validate :password_complexity

  def password_complexity
    if password.present? and not password.match(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d). /)
      errors.add :password, "must include at least one lowercase letter, one uppercase letter, and one digit"
    end
  end
end