Question

我的单选按钮出现了一些问题。这是我的ruby生成的HTML：

    <form accept-charset="UTF-8" action="/uanswers" class="new_uanswer" id="new_uanswer"         method="post"><div style="margin:0;padding:0;display:inline">
    <input name="utf8" type="hidden" value="✓" /><input name="authenticity_token"    type="hidden" value="tiJsYNr71Zqo+R5TheG2nvB3ownJ4iKbmwMfA/11TXg=" /></div> 
        <table> 
    <input id="uanswer_answer_id" name="uanswer[answer_id]" type="hidden" /> <tr> 
    <td><input id="uanswer_answer_id_12" name="uanswer[answer_id]" type="radio" value="12" /></td> 
    <td><label for="uanswer_answer_id">!</label></td> <td> | Count: 0</td> </tr> <input id="uanswer_answer_id" name="uanswer[answer_id]" type="hidden" />
    <tr> 
    <td><input id="uanswer_answer_id_13" name="uanswer[answer_id]" type="radio" value="13" /></td>
    <td><label for="uanswer_answer_id">!!</label></td> <td> | Count: 0</td> </tr> <input id="uanswer_answer_id" name="uanswer[answer_id]" type="hidden" />
    <tr>
    <td><input id="uanswer_answer_id_14" name="uanswer[answer_id]" type="radio" value="14" /></td>
    <td><label for="uanswer_answer_id">!!!</label></td> <td> | Count: 0</td>
    </tr>
</table>

不幸的是，它仅在我选择第三个单选按钮时有效。例如，如果我选择第一个或第二个，则params散列中的“answer_id”字段为空。但是，如果我选择第三个，则它是正确的值：14。为什么会这样呢？ HTML似乎是正确的。

编辑：这是此HTML背后的ERB

<%= form_for(uanswer) do |f| %>
  <table>
  <% answers.each do |answer| %>
  <%= f.hidden_field :answer_id %>
    <tr>
      <% unless current_user.has_answered? question %>
        <td><%= f.radio_button :answer_id, answer.id %></td>
      <% end %>
      <td><%= f.label :answer_id, answer.answer %></td>
      <td> | Count: <%= answer.count %></td>
    </tr>
  <% end %>
  </table>
  <% unless current_user.has_answered? question %>
    <%= f.submit "Answer!" %>
  <% end %>
<% end %>

Answer 1

answer_id的隐藏字段可能是必要的（如果没有选中单选按钮，它将使服务器清除answer_id），但它被放在错误的位置。它应该不在循环中：

<%= form_for(uanswer) do |f| %>
  <table>
  <%= f.hidden_field :answer_id %>
  <% answers.each do |answer| %>
    <tr>
      <% unless current_user.has_answered? question %>
        <td><%= f.radio_button :answer_id, answer.id %></td>
      <% end %>
      <td><%= f.label :answer_id, answer.answer %></td>
      <td> | Count: <%= answer.count %></td>
    </tr>
  <% end %>
  </table>
  <% unless current_user.has_answered? question %>
    <%= f.submit "Answer!" %>
  <% end %>
<% end %>

Rails单选按钮不能始终如一地传递值

1 个答案: