diff --git a/go.mod b/go.mod
index d3bfca1..da5f3a4 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.19.2
 require (
 	qoobing.com/gomod/gorm v0.0.2
 	qoobing.com/gomod/log v1.4.0
-	qoobing.com/gomod/redis v1.3.8
+	qoobing.com/gomod/redis v1.3.9
 )
 
 require (
diff --git a/go.sum b/go.sum
index 52db605..667e372 100644
--- a/go.sum
+++ b/go.sum
@@ -48,6 +48,8 @@ qoobing.com/gomod/log v1.4.0 h1:VSdV8Fm2roCkSwOTunmNrH2kl14KOCYavsh4tJ/SGj0=
 qoobing.com/gomod/log v1.4.0/go.mod h1:rNXuq0d/EWog4+8hIEVGvkusLD/pzafYBQo6w+Evv6A=
 qoobing.com/gomod/redis v1.3.8 h1:9REpvyKXsOWBl3KG1oCGpJcITf7Mz1SjqCeIM65k9cQ=
 qoobing.com/gomod/redis v1.3.8/go.mod h1:5j9kopj3CY1qf70OQ8IHQjDKHUl72rj0LhQgTBpl2BU=
+qoobing.com/gomod/redis v1.3.9 h1:wtojzRP7T+p+MAzkAUrU8GLNDUMU84ZJ3U/cWPrDby8=
+qoobing.com/gomod/redis v1.3.9/go.mod h1:5j9kopj3CY1qf70OQ8IHQjDKHUl72rj0LhQgTBpl2BU=
 qoobing.com/gomod/str v1.0.1/go.mod h1:gbhN2dba/P5gFRGVJvEI57KEJLlMHHAd6Kuuxn4GlMY=
 qoobing.com/gomod/str v1.0.5 h1:AXEB8k/yhepLK5jVez+WL4sWVuCFb8pWAgmo3nvt96A=
 qoobing.com/gomod/str v1.0.5/go.mod h1:gbhN2dba/P5gFRGVJvEI57KEJLlMHHAd6Kuuxn4GlMY=
diff --git a/model.go b/model.go
index 963eb18..55f9d4f 100644
--- a/model.go
+++ b/model.go
@@ -2,6 +2,7 @@ package model
 
 import (
 	"fmt"
+	"reflect"
 	"sync"
 
 	"qoobing.com/gomod/gorm"
@@ -10,11 +11,16 @@ import (
 )
 
 var (
-	instances          = map[string]instance{}
-	errNoModelFound    = errorsWrap("named model(%s) not found")
-	errModeAlreadyInit = errorsWrap("named model(%s) already initilized")
-	errOpenDBFailed    = errorsWrap("open database failed: %s")
-	errOpenRedisFailed = errorsWrap("open redis failed: %s")
+	modelsDb         = map[string]*modelDb{}
+	modelsRedis      = map[string]*modelRedis{}
+	defaultDbName    = ""
+	defaultRedisName = ""
+
+	errNoModelFound     = errorsWrap("named model(%s) not found")
+	errModeAlreadyInit  = errorsWrap("named model(%s) already initilized")
+	errOpenDBFailed     = errorsWrap("open database failed: %s")
+	errOpenRedisFailed  = errorsWrap("open redis failed: %s")
+	errUnknownModelType = errorsWrap("unknown model type: %s")
 )
 
 func errorsWrap(base string) func(...any) error {
@@ -23,154 +29,115 @@ func errorsWrap(base string) func(...any) error {
 	}
 }
 
-const (
-	tx_status_none     = 0
-	tx_status_doing    = 1
-	tx_status_commit   = 2
-	tx_status_rollback = 3
+type (
+	DbConfig     = gorm.Config
+	RedisConfig  = redis.Config
+	Configurable interface {
+		*DbConfig | *RedisConfig
+	}
 )
 
-type Model struct {
-	mu       sync.Mutex
-	dbCfg    *gorm.Config
-	redisCfg *redis.Config
-
-	db         *gorm.DB
-	dbTxStatus int
-	redis      redis.Conn
-	redisPool  *redis.Pool
-}
-
-func (m *Model) Begin() {
-	if m.DB() == nil {
-		panic("unreachable code, db is uninitialized")
-	} else if m.dbTxStatus != tx_status_none {
-		panic("unreachable code, begin transaction towice???")
-	} else {
-		m.dbTxStatus = tx_status_doing
-		m.db = m.db.Begin()
-	}
-}
-
-func (m *Model) Commit() error {
-	if m.DB() == nil {
-		panic("unreachable code, db is uninitialized")
-	} else if m.dbTxStatus != tx_status_doing {
-		return nil
-	} else if err := m.db.Commit().Error; err != nil {
-		m.dbTxStatus = tx_status_rollback
-		return err
-	} else {
-		m.dbTxStatus = tx_status_commit
-		return nil
-	}
-}
-
-func (m *Model) Close() {
-	if m.redis != nil {
-		m.redis.Close()
-	}
-	if m.db == nil {
-		m.dbTxStatus = tx_status_none
-	} else if m.dbTxStatus == tx_status_doing {
-		m.db.Rollback()
-		m.dbTxStatus = tx_status_rollback
-	}
-}
-
-func (m *Model) DB() *gorm.DB {
-	return m.db
-}
-
-func (m *Model) Redis() redis.Conn {
-	return m.redis
-}
-
-func (m *Model) RedisPool() *redis.Pool {
-	return m.redisPool
-}
-
-type instance struct {
-	db       *gorm.DB
-	dbCfg    *gorm.Config
-	redis    *redis.Pool
-	redisCfg *redis.Config
-}
-
-// OpenDefault open 'default' model
-func OpenDefault() (*Model, error) {
-	return Open("default")
-}
-
-// OpenDefault open named model, if err is nil, caller MUST call m.Close() in defer.
-func Open(name string) (m *Model, err error) {
-	// check initialize
-	cfg, ok := instances[name]
-	if !ok {
-		return nil, errNoModelFound(name)
+type (
+	modelDb struct {
+		mu    sync.Mutex
+		db    *gorm.DB
+		dbCfg *gorm.Config
 	}
 
-	// open redis
-	var rds redis.Conn
-	if cfg.redisCfg == nil {
-		// don't need to open redis
-	} else if cfg.redis != nil {
-		rds = cfg.redis.Get()
-	} else if cfg.redis = redis.NewPool(*cfg.redisCfg); cfg.redis == nil {
-		return nil, errOpenRedisFailed("new redis pool return nil")
-	} else {
-		rds = cfg.redis.Get()
+	modelRedis struct {
+		mu        sync.Mutex
+		redis     redis.Conn
+		redisCfg  *redis.Config
+		redisPool *redis.Pool
 	}
-	defer func() {
-		if m == nil && rds != nil {
-			rds.Close()
-		}
-	}()
-
-	// open db
-	var db *gorm.DB
-	if cfg.dbCfg == nil {
-		// don't need to open database
-	} else if cfg.db != nil {
-		db = gorm.NewSession(cfg.db)
-	} else if cfg.db, err = gorm.NewDB(*cfg.dbCfg); err != nil {
-		return nil, errOpenDBFailed(err)
-	} else {
-		db = gorm.NewSession(cfg.db)
-	}
-
-	// success
-	m = &Model{
-		dbCfg:     cfg.dbCfg,
-		redisCfg:  cfg.redisCfg,
-		db:        db,
-		redis:     rds,
-		redisPool: cfg.redis,
-	}
-	return m, nil
-}
-
-// Init init default database config & redis config
-func InitDefault(_defaultDb *gorm.Config, _defaultRds *redis.Config) error {
-	return Init("default", _defaultDb, _defaultRds)
-}
+)
 
 // Init init named database config & redis config
-func Init(name string, dbCfg *gorm.Config, rdsCfg *redis.Config) error {
-	_, ok := instances[name]
-	if ok {
-		return errModeAlreadyInit(name)
+func Init[Config Configurable](name string, cfg Config) error {
+	var (
+		dbCfg     *gorm.Config
+		redisCfg  *redis.Config
+		inCfgType = reflect.TypeOf(cfg)
+	)
+
+	if inCfgType == reflect.TypeOf(dbCfg) {
+		dbCfg = reflect.ValueOf(cfg).Interface().(*gorm.Config)
+		_, ok := modelsDb[name]
+		if ok {
+			return errModeAlreadyInit("db:" + name)
+		}
+		db, err := gorm.NewDB(*dbCfg)
+		if err != nil {
+			return errOpenDBFailed(err)
+		}
+		modelsDb[name] = &modelDb{
+			db:    db,
+			dbCfg: dbCfg,
+		}
+		if defaultDbName == "" || (defaultDbName != "" && name == "default") {
+			defaultDbName = name
+		}
+		log.Infof("success init model(%s) database:%s", name, dbCfg.GetSecDsn())
+		return nil
 	}
-	instances[name] = instance{
-		dbCfg:    dbCfg,
-		redisCfg: rdsCfg,
+
+	if inCfgType == reflect.TypeOf(redisCfg) {
+		redisCfg = reflect.ValueOf(cfg).Interface().(*redis.Config)
+		_, ok := modelsRedis[name]
+		if ok {
+			return errModeAlreadyInit("redis:" + name)
+		}
+		redisPool := redis.NewPool(*redisCfg)
+		if redisPool == nil {
+			return errOpenRedisFailed("new redis pool return nil")
+		}
+		modelsRedis[name] = &modelRedis{
+			redisPool: redisPool,
+			redisCfg:  redisCfg,
+		}
+		if defaultRedisName == "" || (defaultRedisName != "" && name == "default") {
+			defaultRedisName = name
+		}
+		log.Infof("success init model(%s) database:%s", name, redisCfg.GetSecDsn())
+		return nil
 	}
-	if dbCfg != nil && dbCfg.Debug {
-		log.Infof("init model(%s) database:%s", name, gorm.GetSecDsn(dbCfg))
-	}
-	if rdsCfg != nil && rdsCfg.Debug {
-		log.Infof("init model(%s) redis:%s", name, redis.)
-	}
-	log.Infof("init model(%s) done", name)
-	return nil
+
+	log.Infof("failed init model(%s), unknown model type: %s", name, inCfgType.Name())
+	return errUnknownModelType(inCfgType.Name())
+}
+
+func Db() *gorm.DB {
+	return DbOf(defaultDbName)
+}
+
+func DbOf(name string) *gorm.DB {
+	m, ok := modelsDb[name]
+	if !ok {
+		panic(errNoModelFound(name))
+	}
+	return gorm.NewSession(m.db)
+}
+
+func Redis() redis.Conn {
+	return RedisOf(defaultRedisName)
+}
+
+func RedisOf(name string) redis.Conn {
+	m, ok := modelsRedis[name]
+	if !ok {
+		panic(errNoModelFound(name))
+	}
+	return m.redisPool.Get()
+}
+
+func RedisPool() *redis.Pool {
+	return RedisPoolOf(defaultRedisName)
+}
+
+func RedisPoolOf(name string) *redis.Pool {
+	m, ok := modelsRedis[name]
+	if !ok {
+		panic(errNoModelFound(name))
+	}
+	return m.redisPool
 }