ruby-on-rails - 迭代 9 次，我认为我有语法错误

Question

 @numbers = [1,2,3,4,5,6,7,8,9]

  @numbers.each do |n|              

    if @order.card_type"n" != "none" 
      notes +=  "\n\nCard 1: " + @order.card_type1 + "\nPaper Weight: " + @order.paper_weight1 + "\nQuantity: " + @order.quantity1 + "\nInk Color #1: " + @order.ink_color11 + "\nInk Color #2: " + @order.ink_color12 + "\nWording: " + @order.wording1 + "\nReturn Address Printing: " + @order.return_address1 + "\nGuest Address Printing: " + @order.guest_address1.to_s + "\nEnvelope Liners: " + @order.envelope_liners1                 
    end               

  end

我不确定我做错了什么，但我需要在我的 Controller 中用 1-9 替换“n”。我想不出正确的方法来做到这一点。

Answer 1

只需使用 [] 符号和字符串操作访问它:

(1..9).each do |n|              

  if @order["card_type#{n}"] != "none" 
    # ...
  end               

end

否则，您还可以:

@order.send("card_type#{n}")