rails默认选中的单选按钮

Question

I have following code for radio options in loop.

 <% @this.each do |p| %>
 <div class="radio_button_with_text">
         <%=radio_button  "this" ,"name",p.name ,:onclick=>"save_package(#{p.id})"%>

        <p class="radioText"><%= p.name %></p>
 </div>
 <% end %>

I wish to have the first radio option default selected. How can I do this?

:checked => this.first   

is not wokring for me.

Answer 1

Try this Example:

<% @products.each do |product| %>
   <div class="radio_button_with_text">
     <%=radio_button_tag  product.name ,:id, @products.first == product, class: "save_package", "data-id" => product.id %>
     <p class="radioText"><%= product.name %></p>
   </div>
<% end %>

$(document).on('click', '.save_package', function(e) {
  save_package(this.attr("data-id"));
});