相关疑难解决方法(0)

我使用了以下date_select助手,但没有一个按预期工作.我想要选择默认选项框的空白选项.使用以下所有代码,我得到选择框但选择了当前日期.我在轨道上2.3.2

<%= f.date_select :featured_at, :default => {:day => nil, :month => nil, :year => nil} %>
<%#= date_select("post", "featured_at", :prompt => { :day => 'Select day', :month => 'Select month', :year => 'Select year' }) %>
<%#= date_select("post", "featured_at", :default => { :day => nil }) %>
<%#= f.date_select :featured_at, :include_blank => true, :order => [:day, :month, :year] %>