gistfile1.txt

  
  rescue_from Exception, :with => :server_error
  def server_error(exception)    
    respond_to do |format|
      format.html { render template: 'errors/internal_server_error', layout: 'layouts/application', status: 500 }
      format.all  { render nothing: true, status: 500}
    end
  end

rescue_from ActiveRecord::RecordNotFound, :with => :page_not_found
  rescue_from ActionController::RoutingError, :with => :page_not_found
  def page_not_found
    respond_to do |format|
      format.html { render template: 'errors/not_found', layout: 'layouts/application', status: 404 }
      format.all  { render nothing: true, status: 404 }
    end
  end