使用gorm创建casbin数据库报错

1.报错

/github.com/casbin/gorm-adapter/v3@v3.13.0/adapter.go:419 Error 1071: Specified key was too long; max key length is 1000 bytes
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x60 pc=0x12ac3c0]

2.解决办法

我试着将数据库中表的类型变为InnoDB确实解决了问题，gorm默认的引擎是MyISAM,为了直接创建innoDB类型的表，于是我将连接数据库部分按照官网做出如下更改

Db.Set("gorm:table_options", "ENGINE=InnoDB").AutoMigrate(&gormadapter.CasbinRule{})

完整连接数据库

func DbConnect() *gorm.DB{
	mysqlConf := GetConfigData()
	DataSource := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8&parseTime=true&loc=Local",
		mysqlConf.MysqlConf.UserName,
		mysqlConf.MysqlConf.Password,
		mysqlConf.MysqlConf.Host,
		mysqlConf.MysqlConf.Port,
		mysqlConf.MysqlConf.DataBase)
	Db, err := gorm.Open(mysql.Open(DataSource), &gorm.Config{})
	Db.Set("gorm:table_options", "ENGINE=InnoDB").AutoMigrate(&gormadapter.CasbinRule{})
	if err != nil {
		log.Fatal(err)
	}
	mysqlDB,err:=Db.DB()
	if err != nil {
		log.Fatal(err)
	}
	mysqlDB.SetMaxIdleConns(5)
	mysqlDB.SetMaxOpenConns(10)
	return Db
}