UsersController from dj app

usersController.rb

class UsersController < ApplicationController
  before_filter :signed_in_user, only: [:edit, :update]
  before_filter :correct_user,   only: [:edit, :update]
  
  def new
    @user = User.new
  end
  
  def show
    @user = User.find(params[:id])
    @playlists = @user.playlists.paginate(page: params[:page])
  end
  
  def create
    @user = User.new(params[:user])
    if @user.save
      sign_in @user
      flash[:success] = "Welcome to the Sample App!"
      redirect_to @user
    else
      render 'new'
    end
  end
  
  def edit
   
  end
  
  def update
      
      if @user.update_attributes(params[:user])
        flash[:success] = "Profile updated"
        sign_in @user
        redirect_to @user
      else
        render 'edit'
      end
  end
  
  private

    def correct_user
      @user = User.find(params[:id])
      redirect_to(root_path) unless current_user?(@user)
    end
end