impressionist/test_app/app/controllers/posts_controller.rb

class PostsController < ApplicationController
  helper_method :current_user
  impressionist
  def index

  end

  def show

  end

  def edit

  end

  def current_user
    if session[:user_id]
      user = User.new
      user.id = session[:user_id]
      @current_user ||= user
    end
  end
end