feat: update metas

backend/app/http/posts.go

@@ -271,15 +271,20 @@ func (ctl *posts) Buy(ctx fiber.Ctx, id int64, user *model.Users) (*wechat.JSAPI
 	if err != nil {
 		return nil, errors.Wrapf(err, " failed to get post: %d", id)
 	}
+	payPrice := post.Price * int64(post.Discount) / 100
 
-	// create order
 	order, err := models.Orders.Create(ctx.Context(), user.ID, post.ID)
 	if err != nil {
 		return nil, errors.Wrap(err, "订单创建失败")
 	}
 
-	payPrice := post.Price * int64(post.Discount) / 100
 	if user.Balance >= payPrice {
+		if err := models.Orders.SetMeta(ctx.Context(), order.ID, func(om fields.OrderMeta) fields.OrderMeta {
+			om.CostBalance = payPrice
+			return om
+		}); err != nil {
+			return nil, errors.Wrap(err, "订单创建失败")
+		}
 
 		if err := ctl.job.Add(&jobs.BalancePayNotify{OrderNo: order.OrderNo}); err != nil {
 			log.Errorf("add job error:%v", err)
@@ -289,14 +294,15 @@ func (ctl *posts) Buy(ctx fiber.Ctx, id int64, user *model.Users) (*wechat.JSAPI
 		return &wechat.JSAPIPayParams{
 			AppId: "balance",
 		}, nil
-	} else {
-		payPrice = payPrice - user.Balance
-		err = models.Users.SetBalance(ctx.Context(), user.ID, 0)
-		if err != nil {
-			return nil, errors.Wrap(err, "余额支付失败")
-		}
 	}
 
+	payPrice = payPrice - user.Balance
+	if err := models.Orders.SetMeta(ctx.Context(), order.ID, func(om fields.OrderMeta) fields.OrderMeta {
+		om.CostBalance = user.Balance
+		return om
+	}); err != nil {
+		return nil, errors.Wrap(err, "订单创建失败")
+	}
 	prePayResp, err := ctl.wepay.V3TransactionJsapi(ctx.Context(), func(bm *wepay.BodyMap) {
 		bm.
 			Expire(30 * time.Minute).