所以基本上在我的商店里,每件商品都有一个特定的重量,一旦顾客想加什么就加什么,然后去结账,他们就可以看到他们的每一个订单以及名字信息和重量。我还想把所有物品的总重量加在一起。目前,它只显示每个特定项目的权重。

例如

这是我的观点.py

    def checkout(request):
        try:
            current_order = Order.objects.filter(owner=1).get(status="pre-place")
        except Order.DoesNotExist:
            return HttpResponse("Your current order is empty<br><a href=\"browse\">Go back</a>")
        else:
            total_weight = 0
            items = OrderDetail.objects.filter(orderID=current_order)
            template_name = 'store/checkout.html'
            order_details = []
            for item in items:
                weight = item.supplyID.weight * item.quantity
                order_details.append((item, weight))
            return render(request, template_name, {'order_details': order_details, 'current_order': current_order})

这是我的模板

<h1>Your current order</h1>
    <a href="{% url 'Store:browse' %}">return to selecting 
 supplies</a><br><br>
    <table>
        <tr><th>name</th><th>item weight(kg)</th><th>qty</th><th>total 
 weight(kg)</th></tr>
        {% for order_detail, weight in order_details %}
            <tr>
                <td>{{ order_detail.supplyID.name }}</td>
                <td>{{ order_detail.supplyID.weight }}</td>
                <td>{{ order_detail.quantity }}</td>
                <td>{{ weight }}</td>
            </tr>

        {% endfor %}
    </table>