diff --git a/app.go b/app.go
index 3d35552..9ddd3fc 100644
--- a/app.go
+++ b/app.go
@@ -76,6 +76,7 @@ type app struct {
 func (this *app) init(userApp UserApp) {
 	this.userApp = userApp
 	this.nowTime = time.Now()
+	this.ormDbHash = make(map[string]*gorm.DB)
 	this.SetTimeOffset(0)
 	atomic.StoreInt64(&this.nowUnixNano, this.nowTime.UnixNano())
 	_timer = new(timer)