Rails表单中的jQuery自动完成

我有一个电子邮件的Rails表单，我想在收件人字段中自动完成。以下是我所做的：

= f.label :recipient_id, "Send to:"
= text_field_tag :recipient_id, nil
:javascript
 $(function() {
    $( "#recipient_id" ).autocomplete({
        source: "#{escape_javascript url_for(:action => 'recipient_autocomplete',
                     :controller => 'sent')}",
        minLength: 2,
        select: function( event, ui ) {
            $('input#recipient_id').attr('value', ui.item.value);
            ui.item.value = ui.item.label
        }
    });
});

在我的控制器中，我有：

  def recipient_autocomplete
    @users= User.all(:conditions => ['first_name LIKE ? OR last_name LIKE?', 
      "%#{params[:term]}%", "%#{params[:term]}%"])
    render :json => @users.collect {|x| {:label=>x.full_name, :value=>x.id}}.compact
  end

json调用工作正常，显示全名OK。以下是要素：

<input type="text" name="recipient_id" id="recipient_id" class="ui-autocomplete-input"
  autocomplete="off" role="textbox" aria-autocomplete="list" 
  aria-haspopup="true" value="158">

但是，当我单击Send（相当于submit）时，将发送Receipent全名而不是Receipent_id

---

我如何告诉Rails表单选择输入字段的值（在上面的示例中是158）而不是它的标签？

Rails对此有很好的解释。

错误HTML规范说

文本字段的文本是它将返回的值。但是您可以使用
隐藏的\u字段
来传递
\u id
，就像这样

= f.label :recipient_id, "Send to:"
= text_field_tag :recipient_name, nil
= hidden_field_tag :recipient_id, nil
:javascript
 $(function() {
    $( "#recipient_id" ).autocomplete({
        source: "#{escape_javascript url_for(:action => 'recipient_autocomplete',
                     :controller => 'sent')}",
        minLength: 2,
        select: function( event, ui ) {
            $('input#recipient_name').val(ui.item.label);
            $('input#recipient_id').val(ui.item.value);
        }
    });
});

那是从