ruby-on-rails - 如何验证包含两个单词的列表的包含

Question

所以我刚刚想出了如何验证我的选择是否包含在内。但是，我遇到了一个问题。如果其中一个值包含两个或更多单词，我无法弄清楚如何验证它。

举个例子:

validates_inclusion_of :possibility, :in => %w(yes maybe no)

它会完美地工作。然而，如果我有两个，三个词说:

validates_inclusion_of :job_possibility, :in => %w(yes please maybe not no thank you)

那是行不通的。我试过将它们添加到括号等中。但能够弄清楚。有人知道如何进行这项工作吗？

Answer 1

您可以使用 %W 而不是 %w 来实现所需的结果。由于%W支持String插值，可以轻松实现二字、三字等

使用%W:

validates_inclusion_of :job_possibility, :in => %W(yes please #{"maybe not"} no #{"thank you"})

-或者-

你可以直接指定数组:

validates_inclusion_of :job_possibility, :in => ["yes", "please", "maybe not", "no", "thank you"]

例如:

在 IRB 中，

 > job_possibility = %W(yes please #{"maybe not"} no #{"thank you"})
 ## => ["yes", "please", "maybe not", "no", "thank you"] 
 > job_possibility = ["yes", "please", "maybe not", "no", "thank you"]
 ## => ["yes", "please", "maybe not", "no", "thank you"]