feat: 修改订单创建逻辑，直接使用Post对象而非PostID

backend_v1/app/services/orders.go

@@ -124,18 +124,13 @@ func (m *orders) GetByOrderNO(ctx context.Context, orderNo string) (*models.Orde
 	return models.OrderQuery.WithContext(ctx).Where(models.OrderQuery.OrderNo.Eq(orderNo)).First()
 }
 
-func (o *orders) CreateFromUserPostID(ctx context.Context, userId, postId int64) (*models.Order, error) {
-	post, err := Posts.FindByID(ctx, postId)
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to get post")
-	}
-
+func (o *orders) CreateFromUserPostID(ctx context.Context, userId int64, post *models.Post) (*models.Order, error) {
 	m := &models.Order{}
 	m.Status = fields.OrderStatusPending
 	m.OrderNo = time.Now().Format("20060102150405")
 	m.SubOrderNo = m.OrderNo
 	m.UserID = userId
-	m.PostID = postId
+	m.PostID = post.ID
 	m.Meta = types.NewJSONType(fields.OrderMeta{})
 	m.Price = post.Price
 	m.Discount = post.Discount