diff --git a/backend_v1/app/http/posts.go b/backend_v1/app/http/posts.go
index e2fccb5..ad014a5 100644
--- a/backend_v1/app/http/posts.go
+++ b/backend_v1/app/http/posts.go
@@ -320,7 +320,7 @@ func (ctl *posts) Buy(ctx fiber.Ctx, post *models.Post, user *models.User) (*wec
 	}
 	// payPrice := post.PayPrice()
 
-	order, err := services.Orders.CreateFromUserPostID(ctx, user.ID, post.ID)
+	order, err := services.Orders.CreateFromUserPostID(ctx, user.ID, post)
 	if err != nil {
 		return nil, errors.Wrap(err, "订单创建失败")
 	}
diff --git a/backend_v1/app/services/orders.go b/backend_v1/app/services/orders.go
index 71e52c4..8c9fd47 100644
--- a/backend_v1/app/services/orders.go
+++ b/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