gistfile1.txt

 def update
   @user = User.find(params[:id])
   if @user.update_attributes(params[:user])
          flash[:notice] = 'Dados salvos com sucesso'
          redirect_to :action => 'edit'
        else
          flash[:error] = 'Falha ao salvar dados'
          render :edit
        end
      
      # Get user data by id
      @user = User.find(params[:id])
end

#model
class User < ActiveRecord::Base
  attr_accessible :created, :email, :name, :password
  
  before_save :encrypt_password
  
  validates :name, :length => {:in => 3..50}
  
  # Validates email with regex
  validates :email, :format => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i
  
  # I need pass by here
  validates :password, :length => {:in => 3..50}, :if => :has_password?
  
  def has_password?
    !@password.blank?
  end
  
  def encrypt_password
    if password.present?
      self.password = BCrypt::Engine.hash_secret(password, BCrypt::Engine.generate_salt)
    end
  end
  
end