为什么排除时验证不起作用：指向变量？

Question

我在我的ActiveRecord的验证如下：

validates :username, :exclusion => { :in => %w(admin admins administrator administrators), :message => "\"%{value}\" is reserved."} 

其作品，因为它应该。但是，当我将其替换为：

validates :username, :exclusion => { :in => @reserved_words, :message => "\"%{value}\" is reserved."} 
@reserved_words = ["admin","admins","administrator","administrators"] 

我得到以下错误：

An object with the method #include? or a proc or lambda is required, and must be supplied as the :in option of the configuration hash.

这究竟是为什么？

Answer 1

您是否真的在初始化@reserved_words变量后使用它？你的线路应该交换！