Django中的html表單返回none

我試圖將這個HTML表單保存在數據庫中的表中，但出現了“無”錯誤。我已經講了一個小時了。請幫忙

拜托，我該怎么解決這個問題

這是我創建的HTMLorder.html

 <form action="" method="post" id="payment-form">
                      <input type="text" class="form-control" id="first_name" 
                        name="first_name"
                        value="{{request.user.first_name}}">
                   
                    <textarea type="text" class="form-control" id="address" name="address" 
                    placeholder="1234 Main St" required></textarea>
               
                <button id="submit" class="btn btn-success lg w-100 fw-bold" >
                  Proceed to Payment
                </button>

</form>

這是我的views.py

def add(request):
    basket = Basket(request)
    if request.POST.get("action") == "post":
        order_key = request.POST.get("order_key")
        user_id = request.user.id
        baskettotal = basket.get_total_price()
        first_name = request.POST.get("first_name")
        last_name = request.POST.get("last_name")
        address = request.POST.get("address")
        print(first_name, last_name, address)

        order = Order.objects.create(
                    first_name = first_name,
                    address=address,
                    total_paid=baskettotal,
                    
            )
            order_id = order.pk
        response = JsonResponse({"success": "Order created"})
        return response

js文件

<script type="text/javascript">

  function makePayment(e) {
    e.preventDefault();
    
    $.ajax({
      type: "POST",
      url: '{% url "order:add" %}',
      data: {
        csrfmiddlewaretoken: "{{csrf_token}}",
        action: "post",
      },
      success: function (json) {
        console.log(json.success)
      },
      error: function (xhr, errmsg, err) {},
    });

   
  }
</script>