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在我的項目中,我可以將產品添加到購物車,我可以刪除它們。一切工作正常,但問題是,當我的購物車是空的,我得到一個錯誤,而不是顯示沒有購物車的模板。錯誤是:變量「產品」不存在於...。我怎樣才能繞過這個錯誤來顯示模板?當購物車是空的Symfony2錯誤
這是我的購物車的行動:
public function summaryAction()
{
$session = $this->getRequest()->getSession();
$cart = $session->get('cart', array());
// fetch the information using query and ids in the cart
if($cart != '') {
$em = $this->getDoctrine()->getEntityManager();
foreach($cart as $id => $quantity) {
$productIds[] = $id;
}
if(isset($productIds))
{
$em = $this->getDoctrine()->getEntityManager();
$product = $em->getRepository('MpShopBundle:Product')->findById($productIds);
} else {
return $this->render('MpShopBundle:Frontend:product_summary.html.twig', array(
'empty' => true,
));
}
return $this->render('MpShopBundle:Frontend:product_summary.html.twig', array(
'product' => $product,
));
} else {
return $this->render('MpShopBundle:Frontend:product_summary.html.twig', array(
'empty' => true,
));
}
}
這是我的模板:
{% if product %} /// error at this line
<tbody>
{% for key, item in cart %}
{% for item in product %}
<tr>
<td> <img width="60" src="{{ asset('bundles/mpFrontend/assets/products/4.jpg') }}" alt=""/></td>
<td>{{ item.model }}</td>
<td>
<div class="input-append"><input class="span1" style="max-width:34px" placeholder="1" id="appendedInputButtons" size="16" type="text">
<button class="btn" type="button"><i class="icon-minus"></i></button>
<button class="btn" type="button"><i class="icon-plus"></i></button>
<button class="btn btn-danger" type="button"><a href="{{ path('cart_remove', {'id': key}) }}"><i class="icon-remove icon-white"></i></button>
</div>
</td>
<td>$120.00</td>
<td>$25.00</td>
<td>$15.00</td>
<td>$110.00</td>
</tr>
{% endfor %}
{% endfor %}
{% endif %}