[英]selected values are resetting in page reload in ruby on rails
我是Rails上的ruby的新手。我想顯示從下拉列表中選擇的值,並在頁面重新加載中選中單選按鈕。 重新加載頁面后,下拉菜單和單選按鈕的選定值將被重置。因此,請讓我知道如何解決此問題。這是我正在使用的代碼。
<%= form_tag :action => 'show' do%>
<strong>Select device: </strong> <%= collection_select(:device, :id, @devices, :id, :name, options ={:prompt => "-Select a device"}) %>
<br></br>
<strong>Chose:</strong><%= radio_button_tag :name,:time, false, :onclick => "this.parentNode.submit();"%>Time
<%= radio_button_tag :name,:graph%>Graph
<% end %>
嘗試:
collection_select(:device, :id, @devices, :id, :name, {:selected => @your_selected_value, :prompt => "-Select a device"})
參見radio_button_tag(名稱,值,選中=否,選項= {})
<%= radio_button_tag :name,:time, @your_checked_value.eql?('time'), :onclick => "this.parentNode.submit();"%>Time
<%= radio_button_tag :name,:graph, @your_checked_value.eql?('graph') %>Graph
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