Rails，使用单选按钮传递数组

I'm making a search form in rails, I have different radio fields, I have no problems with those ones, but I'm having trouble with the last one, what I want is a radio button that when active enables two text-fields, in which you write two different dates (basically a date range) and then passes on an array with the dates in the range.I'm making a search form in rails, I have diffe