gistfile1.rb

# Controller
module Admin
  class UsersController < AdminController
    def edit
      @user = User.find(params[:id])
    end

    def update
      if request.put?
        @user = User.find(params[:id])
        
        if @user.update_attributes(to_update)
          session[:logged_user] = @logged_user = @user 
          flash[:notice] = 'Dados salvos com sucesso'
          redirect_to :action => 'edit'
        else
          flash[:error] = 'Falha ao salvar dados'
          render :edit
        end
      end
    end

  end
end



# Model

class User < ActiveRecord::Base
  attr_accessible :created, :email, :name, :password
  before_save :encrypt_password
 
  validates :name, :length => {:in => 3..50}
  validates :email, :format => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i
  validates :password, :length => {:in => 3..50}, :if => :has_password?

  
  def has_password?
    !password.blank?
  end
  
  def encrypt_password
    if password.present? && !password.blank?
      password = BCrypt::Password.create(password)
    end
  end
  
end