Rails 搜索表单在提交下拉列表后保留值

Question

您好，我有一个如下所示的搜索表单。我试图让下拉框保留提交时选择的值。

 <%= search_form_for @search do |f| %>
<th><%= f.label :model_eq, "Search By Model" %>
<%= f.select :model_eq, options_for_select([["ALL"],
    ['Gender:Condition'],
    ['Naive:Stage'],['Race:Condition']],:selected => params[:model_eq]) %></th>
<%= f.submit "Search" , :name => nil%>
<% end %>

我想添加

:selected => params[:model_eq]

会保留所选值，但事实并非如此。我也试过

:selected => params[:model]

但这也行不通。

Answer 1

为此，您应该使用 params[:q][:model_eq]：

<%= f.select :model_eq, options_for_select([], :selected => params[:q][:model_eq]) %>

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