Rails:在ActionView-Helper'collection_select'中預選一個值
我試圖讓ActionView-Helper collection_select獲取將在下拉菜單中預選的值。 無論(:selected在HTML選項哈希) <%= collection_select(:my_object, :my_method, @my_collection, :id, :description_string, {}, {:selected => @my_collection_ob