更新为postgre储存

cloudprint-backend/internal/repository/order_repository.go

@@ -116,14 +116,14 @@ func (r *OrderRepository) GetStatistics(ctx context.Context) (totalUsers, totalO
 	// 今日订单数
 	today := time.Now().Format("2006-01-02")
 	if err = r.db.WithContext(ctx).Model(&model.Order{}).
-		Where("DATE(created_at) = ? AND status = ?", today, model.OrderStatusPaid).
+		Where("created_at::date = ? AND status = ?", today, model.OrderStatusPaid).
 		Count(&todayOrders).Error; err != nil {
 		return 0, 0, 0, 0, 0, fmt.Errorf("count today orders failed: %w", err)
 	}
 	// 今日收入
 	if err = r.db.WithContext(ctx).Model(&model.Order{}).
 		Select("COALESCE(SUM(total_amount), 0)").
-		Where("DATE(created_at) = ? AND status = ?", today, model.OrderStatusPaid).
+		Where("created_at::date = ? AND status = ?", today, model.OrderStatusPaid).
 		Scan(&todayRevenue).Error; err != nil {
 		return 0, 0, 0, 0, 0, fmt.Errorf("sum today revenue failed: %w", err)
 	}