Ruby on rails 如何在我的模型中捕捉复选框标记值？

我的视图中有一个复选框

<%= check_box_tag 'email_checker', 'selected' %>

如果选中此复选框，则我希望在函数中执行特定操作。我正在自定义的函数位于模型内部。下面是我要使用复选框值自定义的“如果”

if ????
    notified = []
    # Author and assignee are always notified unless they have been
    # locked or don't want to be notified
    notified << author if author
    ...

if？？？？
通知=[]
#除非已通知作者和受让人，否则他们始终会收到通知
#已锁定或不希望收到通知
通知在您的电子邮件检查器模型中，您可以只参考所选内容。不能在模型中引用参数。例如，您的email_checker.rb模型可能如下所示：

attr_accessible :selected

before_save :some_function_using_selected #or you can use whichever callback is appropriate for that function

def some_function_using_selected
    if selected == true    #assuming your field is a boolean
        # your code
    end
end