模板解析不到数据？默认采用thinkphp模板
后台=============
public function goods(){
$id=$_GET['id'];
$product=D('Product')->getProductById($id);
dump($product);
$this->list=$product;
$this->display();
}
此处dump有数据呢。可是前台解析不了数据？
=================
前台接收
<volist name="list" id="vo">
{$vo['product_name']}
{$vo.product_price}
{$vo.product_detail}
</volist>

====================
<?php if(is_array($list)): foreach($list as $key=>$vo): ?><div>
<ul class="my-collect-list">
<li>
<div class="collect-list-left">
<dl>
<dd><a href=""><img src="__ROOT__/<?php echo ($vo['product_img']); ?>" style="height:100px;"></a></dd>
<dd>
<?php echo ($vo['product_name']); ?>
<?php echo ($vo["product_price"]); ?>
<?php echo ($vo["product_detail"]); ?>
</dd>
<dd class="buy">
<input name="button" class="buy-btn" value="购买" onclick="javascript:location.href = '<?php echo U('Order / goods','id = '.$vo['id']);?>'"></dd>
</dl>
</div>
</li>
</ul>
</div><?php endforeach; endif; ?>-->