Django在没有Django表单的情况下获取所选值

我在模板中有一个select表单，它希望在运行veiws.py中的add to cart函数时获取所选值并将其更新到OrderItem模型的item_选项字段，没有Django表单我怎么做

models.py：

class product_option(models.Model):
  option_name = models.CharField(max_length=200)
  option1 = models.CharField(max_length=200)
  ...

  def __str__(self):
    return self.option_name


class Product(models.Model):
  ....
  product_option = models.ForeignKey(product_option, on_delete=models.SET_NULL, blank=True, null=True)

  def __str__(self):
    return self.product_name

  def get_add_to_cart_url(self):
    return reverse("add_to_cart", kwargs={'slug': self.slug})


class OrderItem(models.Model):
  ...
  item_option = models.CharField(null=True, max_length=200)

模板：

{% for detail in products %}
<a class="btn btn-outline-dark mt-2 mb-3" href="{{ details.get_add_to_cart_url }}"><i class="fas fa-cart-plus mr-2"></i>add to cart</a>
<select class="form-control d-inline-block w-50">
                <option value="{{ details.product_option.option1 }}">{{ details.product_option.option1 }}
                </option>
                <option value="{{ details.product_option.option2 }}">{{ details.product_option.option2 }}
                </option>
                 ....
             </select>
   {% endfor %}

def add_to_cart(request, slug):
item = get_object_or_404(Product, slug=slug)
order_item, created = OrderItem.objects.get_or_create(
   ....
)
order_qs = Order.objects.filter(user=request.user, ordered=False)
if order_qs.exists():
    order = order_qs[0]
    if order.items.filter(item__slug=item.slug).exists():
        ....
        order_item.item_option = request.GET.get('value')
        order_item.save()
        ...
    else:
       ....
else:
    ....
    return redirect('product_detail', slug=slug)