update

mymysql/mysql.go

@@ -10,6 +10,8 @@ import (
 	"time"
 )
 
+const DefaultKey = "default"
+
 var (
 	DefaultConfig = &Config{
 		Dsn:         "root:root@tcp(127.0.0.1:3306)/?loc=Local&charset=utf8mb4&parseTime=true",
@@ -20,12 +22,14 @@ var (
 		Debug:       true,
 		GormLogger:  gormLogger.Default.LogMode(gormLogger.Info),
 	}
+
+	instanceMap = make(map[string]*MyDB)
 )
 
 type (
 	MyDB struct {
-		DB    *gorm.DB
-		SqlDB *sql.DB
+		db    *gorm.DB
+		sqlDb *sql.DB
 	}
 	Config struct {
 		Dsn         string
@@ -38,7 +42,27 @@ type (
 	}
 )
 
-func New(config *Config) (*MyDB, error) {
+func Instance(key ...string) *MyDB {
+	var key0 string
+
+	if len(key) > 0 {
+		key0 = key[0]
+	} else {
+		key0 = DefaultKey
+	}
+
+	instance, ok := instanceMap[key0]
+	if !ok {
+		panic(fmt.Errorf("%s not config", key))
+	}
+	return instance
+}
+
+func NewDefault(config *Config) (*MyDB, error) {
+	return New(DefaultKey, config)
+}
+
+func New(key string, config *Config) (*MyDB, error) {
 	var (
 		maxLifeTime, _ = time.ParseDuration(DefaultConfig.MaxLifeTime)
 		maxIdleTime, _ = time.ParseDuration(DefaultConfig.MaxIdleTime)
@@ -92,10 +116,13 @@ func New(config *Config) (*MyDB, error) {
 	sqlDb.SetMaxIdleConns(config.MaxIdleConn)
 	sqlDb.SetConnMaxLifetime(maxLifeTime)
 	sqlDb.SetConnMaxIdleTime(maxIdleTime)
-	return &MyDB{
-		DB:    db,
-		SqlDB: sqlDb,
-	}, nil
+
+	myDb := &MyDB{
+		db:    db,
+		sqlDb: sqlDb,
+	}
+	instanceMap[key] = myDb
+	return myDb, nil
 }
 
 func DefaultGormLogger(level gormLogger.LogLevel) gormLogger.Interface {
@@ -113,7 +140,15 @@ func NewGormLogger(writer gormLogger.Writer, gormLoggerConfig gormLogger.Config)
 }
 
 func (m *MyDB) Close() {
-	if m.SqlDB != nil {
-		m.SqlDB.Close()
+	if m.sqlDb != nil {
+		m.sqlDb.Close()
 	}
 }
+
+func (m *MyDB) DB() *gorm.DB {
+	return m.db
+}
+
+func (m *MyDB) SqlDB() *sql.DB {
+	return m.sqlDb
+}

mymysql/mysql_test.go

@@ -6,7 +6,7 @@ import (
 )
 
 func TestMysql(t *testing.T) {
-	myDB, err := New(&Config{
+	myDB, err := NewDefault(&Config{
 		Dsn:         "root:root@tcp(127.0.0.1:3306)/site?loc=Local&charset=utf8mb4&writeTimeout=3s&readTimeout=3s&timeout=2s&parseTime=true",
 		MaxOpenConn: 16,
 		MaxIdleConn: 4,
@@ -23,7 +23,7 @@ func TestMysql(t *testing.T) {
 	defer myDB.Close()
 
 	var res = make(map[string]interface{})
-	err = myDB.DB.Table("image").Limit(1).Take(&res).Error
+	err = myDB.db.Table("image").Limit(1).Take(&res).Error
 	if err != nil {
 		fmt.Println(err)
 		return