diff --git a/service/region.go b/service/region.go
index 76ba5b1..e3b935a 100644
--- a/service/region.go
+++ b/service/region.go
@@ -62,7 +62,7 @@ func (_RegionService) fetchRegion(code string) (*model.Region, error) {
 		return cachedRegion, nil
 	}
 	region := new(model.Region)
-	err := global.DB.NewSelect().Model(&region).WherePK(code).Scan(ctx)
+	err := global.DB.NewSelect().Model(&region).Where("code = ?", code).Scan(ctx)
 	if err != nil && region != nil {
 		relationName := fmt.Sprintf("region:%s", code)
 		cache.CacheSearch(region, []string{relationName}, "region", code)