def addtocart(request):
username = request.session.get('username')
data = {'status': '200', 'msg': 'ok'}
# ajax请求的，则返回的也是返回到ajax，判断用户是否登录
if not username:
data['status'] = '302'
data['msg'] = '用户未登录'
return JsonResponse(data)
# 获取到商品的id
goodsid = request.GET.get('goodsid')
# 找到对应的商品
goods = MarketGoods.objects.filter(pk=goodsid).first()
user = User.objects.filter(u_name=username).first()
# 从购物车里检索这个商品，如果有的话，数量加1，如果没有就新建一个
cart_item = Cart.objects.filter(c_user=user).filter(c_goods=goods).filter(
c_belong=False).first()
if not cart_item:
cart_item = Cart()
else:
cart_item.c_num = cart_item.c_num + 1
cart_item.c_goods = goods
cart_item.c_user = user
cart_item.save()
data['c_num'] = cart_item.c_num
return JsonResponse(data)
