ruby-on-rails - 集合选择错误，无法在其中使用默认值

Question

我正在使用以下代码来获取默认值

<%= f.collection_select :location_id, Location.all, :id, {:selected => session["location"]},:formatted_display, { prompt: true }, :required => true,  :class => 'chosen-select order_form' %>

尝试上述操作时出现以下错误：

wrong number of arguments (7 for 4..6)

Answer 1

试试这个

<%= f.collection_select :location_id, Location.all, :id, :name,{ :prompt => true , :selected => session["location"]},  :class => 'chosen-select order_form'%>