如何让select_date在重新渲染时保留选定的值

Question

我有一个date_select：

<%= f.date_select :date_of_birth, {
                  :with_css_classes => true,
                  :order => [:month, :day, :year],
                  :prompt => true,
                  start_year: Date.today.year, end_year: Date.today.year - 100}, {:class => "select"} %>

如果出现错误，并且页面重新渲染，则该值将丢失。通过常规选择我设置了参数，但我不知道如何或使用date_select

Answer 1

参考this，使用selected

 <%= f.date_select :date_of_birth, {
                   with_css_classes: true,
                   order: [:month, :day, :year],
                   selected: @date
                   prompt: true,
                   start_year: Date.today.year, end_year: Date.today.year - 100},
                   {:class => "select"} %>