以前用的Ajax實例，以后用的時候可以仿照寫

JS部分

   /* 下訂單觸發click事件，用來校驗訂單是否下成功，根據AJAX返回值展示不同頁面*/
   $('#order_btn').click(function(){
     orderid = []
     $('.goods_list_td').each(function(){
       orderid.push($(this).attr('id'));
     });
     localStorage.setItem('order_finish',2);
     $.post({
       url:'/order/addorder/',
       dataType:'json',
       type:'POST',
       data:{
         'csrfmiddlewaretoken': '{{ csrf_token }}',
         id:orderid,
         total:totalPay,
         address:$('#oaddress').text(),
       },
     })
      .done(function(data){
        if(data.status == 1){
          $('.popup_con p').text('訂單提交成功！');
          $('.popup_con').fadeIn('fast', function() {
            setTimeout(function(){
              $('.popup_con').fadeOut('fast',function(){
            window.location.href = '/user/user_center_order&1/';
              });   
            },3000)  
          });
        }
        else if(data.status == 2){
          $('.popup_con p').text('超出庫存請修改！');
          $('.popup_con').fadeIn('fast', function() {
            setTimeout(function(){
              $('.popup_con').fadeOut('fast',function(){
            window.location.href = '/cart/';
              });   
            },3000)  
          });
        }
      });
     
   });

Python代碼

def addorder(request):
    """
    下訂單功能
    1）根據頁面上AJAX傳來的請求，依次將價格、地址、用戶id、時間保存為一條訂單數據，訂單id由時間構建
    2）由order函數傳的orderlist，由place_order.html頁面的JS構造成數組傳到本視圖，重新getlist解析為列表
       作為訂單詳情頁中購物車中的每個商品
    3）根據步驟2）中得到的詳細商品列表，構造訂單詳細信息表，減去相應的庫存數量
    4）步驟3）執行后刪除購物車中的信息
    """

    # 設置事務點，發生異常后回滾到此處
    tran_id = transaction.savepoint()

    # 根據POST和session獲取信息
    post = request.POST
    orderlist = post.getlist('id[]')
    total = post.get('total')
    address = post.get('address')
    uid = request.session.get('userid')
    time = datetime.now()

    # 創建訂單表
    order = OrderInfo()
    order.oid = '%s%d' % (time.strftime('%Y%m%d%H%M%S'), uid)
    order.user_id = uid
    order.odate = time
    order.ototal = Decimal(total)
    order.oaddress = address
    order.save()

    # 遍歷購物車中提交信息，創建訂單詳情表
    for orderid in orderlist:
        cartinfo = CartInfo.objects.get(id=orderid)
        good = GoodsInfo.objects.get(cartinfo__id=cartinfo.id)

        # 判斷庫存是否夠
        if int(good.gkucun) >= int(cartinfo.count):
            # 庫存夠，移除購買數量并保存
            good.gkucun -= int(cartinfo.count)
            good.save()

            goodinfo = GoodsInfo.objects.get(cartinfo__id=orderid)

            # 創建訂單詳情表
            detailinfo = OrderDetailInfo()
            detailinfo.goods_id = int(goodinfo.id)
            detailinfo.order_id = int(order.oid)
            detailinfo.price = Decimal(int(goodinfo.gprice))
            detailinfo.count = int(cartinfo.count)
            detailinfo.save()

            # 循環刪除購物車對象
            cartinfo.delete()
        else:
            # 庫存不夠出發事務回滾
            transaction.savepoint_rollback(tran_id)
            # 返回json供前臺提示失敗
            return JsonResponse({'status': 2})

    # 返回json供前臺提示成功
    return JsonResponse({'status': 1})