/ addtocart /'ordered_name'处的MultiValueDictKeyError

Question

我正在尝试运行添加到购物车功能，但是单击时出现此错误； / addtocart /处的MultiValueDictKeyError 'ordered_name' 这是我的代码

def addtocart(request):
    ordered_name = request.POST['ordered_name']
    price = request.POST['price']
    image = request.POST['image']

    put_item = OrderedItem(ordered_name=ordered_name, price=price, image=image)
    put_item.save()
    return redirect('cart')

class OrderedItem(models.Model):
    ordered_name = models.CharField(max_length=50)
    price = models.FloatField()
    image = models.ImageField(upload_to='pics')