如何select时间选项?

How to select time options?

在 ruby、my_form.html.erb 我有:

<%= f.input :doors, collection => :00, :15, :30, :45, prompt => "Select the time" %>

如何允许用户以 :15 分钟为间隔 select 一个小时和几分钟?我也在使用 simple_form.

答案是minute_step:

<%= f.input :doors, {minute_step: 15}%>
<%= f.input :showtime, {minute_step: 15} %>