diff --git a/dri/download/download.go b/dri/download/download.go
index 4d84680..ede6a81 100644
--- a/dri/download/download.go
+++ b/dri/download/download.go
@@ -18,13 +18,13 @@ func Down(url, path, name string, e ...*Error) bool {
 	}
 	out, err := os.Create(path + name)
 
-	if err != nil && e[0] != nil {
+	if err != nil && len(e) != 0 {
 		e[0].SetError(err)
 		return false
 	}
 	defer out.Close()
 	resp, err := http.Get(url)
-	if err != nil && e[0] != nil {
+	if err != nil && len(e) != 0 {
 		e[0].SetError(err)
 		return false
 	}
diff --git a/dri/mongodb/mongodb.go b/dri/mongodb/mongodb.go
index 24c1964..93252f1 100644
--- a/dri/mongodb/mongodb.go
+++ b/dri/mongodb/mongodb.go
@@ -1,4 +1,4 @@
-package mongodb
+package libs
 
 import (
 	. "code.hoteas.com/golang/hotime/common"
@@ -8,7 +8,7 @@ import (
 	"go.mongodb.org/mongo-driver/mongo/options"
 )
 
-type mongoDb struct {
+type MongoDb struct {
 	Client   *mongo.Client
 	Ctx      context.Context
 	DataBase *mongo.Database
@@ -16,12 +16,12 @@ type mongoDb struct {
 	LastErr  error
 }
 
-func Init(database, url string) (*mongoDb, error) {
-	db := mongoDb{}
+func GetMongoDb(database, url string) (*MongoDb, error) {
+	db := MongoDb{}
 	clientOptions := options.Client().ApplyURI(url)
 
 	db.Ctx = context.TODO()
-	// Connect to MongoDB
+	// Connect to MongoDb
 	var err error
 	db.Client, err = mongo.Connect(db.Ctx, clientOptions)
 	if err != nil {
@@ -32,7 +32,7 @@ func Init(database, url string) (*mongoDb, error) {
 	if err != nil {
 		return nil, err
 	}
-	fmt.Println("Connected to MongoDB!")
+	fmt.Println("Connected to MongoDb!")
 	//databases, err := db.Client.ListDatabaseNames(db.Ctx, bson.M{})
 	//if err != nil {
 	//	return nil, err
@@ -43,7 +43,7 @@ func Init(database, url string) (*mongoDb, error) {
 
 }
 
-func (that *mongoDb) Insert(table string, data interface{}) string {
+func (that *MongoDb) Insert(table string, data interface{}) string {
 	collection := that.DataBase.Collection(table)
 	re, err := collection.InsertOne(that.Ctx, data)
 	if err != nil {
@@ -53,7 +53,7 @@ func (that *mongoDb) Insert(table string, data interface{}) string {
 	return ObjToStr(re.InsertedID)
 }
 
-func (that *mongoDb) InsertMany(table string, data ...interface{}) Slice {
+func (that *MongoDb) InsertMany(table string, data ...interface{}) Slice {
 	collection := that.DataBase.Collection(table)
 	re, err := collection.InsertMany(that.Ctx, data)
 	if err != nil {
@@ -65,7 +65,7 @@ func (that *mongoDb) InsertMany(table string, data ...interface{}) Slice {
 
 }
 
-func (that *mongoDb) Update(table string, data Map, where Map) int64 {
+func (that *MongoDb) Update(table string, data Map, where Map) int64 {
 	collection := that.DataBase.Collection(table)
 	re, err := collection.UpdateMany(that.Ctx, where, data)
 
@@ -78,7 +78,7 @@ func (that *mongoDb) Update(table string, data Map, where Map) int64 {
 
 }
 
-func (that *mongoDb) Delete(table string, where Map) int64 {
+func (that *MongoDb) Delete(table string, where Map) int64 {
 	collection := that.DataBase.Collection(table)
 	re, err := collection.DeleteMany(that.Ctx, where)
 
@@ -91,7 +91,7 @@ func (that *mongoDb) Delete(table string, where Map) int64 {
 
 }
 
-func (that *mongoDb) Get(table string, where Map) Map {
+func (that *MongoDb) Get(table string, where Map) Map {
 	results := []Map{}
 	var cursor *mongo.Cursor
 	var err error
@@ -119,7 +119,7 @@ func (that *mongoDb) Get(table string, where Map) Map {
 	return nil
 }
 
-func (that mongoDb) Select(table string, where Map, page, pageRow int64) []Map {
+func (that MongoDb) Select(table string, where Map, page, pageRow int64) []Map {
 	page = (page - 1) * pageRow
 	if page < 0 {
 		page = 0