Question

I’m doing the chapter exercises of Agile Web Development with Rails. It’s a store with products which you can add to a cart. A product inside a cart is called a LineItem. You can delete individual line items inside the cart. When the last line item is deleted I want the entire cart to be destroyed. The code I have doesn’t work:

CartsController

def destroy
  @cart = current_cart
  @cart.destroy
  session[:cart_id] = nil

  respond_to do |format|
    format.html { redirect_to store_path }
    format.json { head :no_content }
  end
end

LineItemsController

def destroy
  @cart = current_cart
  @line_item = LineItem.find(params[:id])
  quantity = @line_item.quantity

  if quantity > 1
    quantity -= 1
    @line_item.update_attribute(:quantity, quantity)
  else
    @line_item.destroy
  end

  respond_to do |format|
    format.html {
      if @cart.line_items.empty?
        @cart.destroy
      else
        redirect_to @cart
      end
    }
    format.json { head :no_content }
  end
end

This produces the following error:

Template is missing

Missing template line_items/destroy, application/destroy with {:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :coffee]}. Searched in: * "/home/mike/Projects/depot/app/views"

When the cart is destroyed I want to end up at store_path.

thanks,
mike

Answer 1

See the addition (as a comment):

  if @cart.line_items.empty?
    @cart.destroy
    # redirect_to store_path
  else