Use sharding with AutoMigrate failed

[mtcoafun]

Description

1. when a dataobject use sharding, and automigrate when connect to Mysql server, it will just appear a tabel, and sharding aljust like this

ShardingAlgorithm: func(columnValue interface{}) (suffix string, err error) {
	if id, ok := columnValue.(uint); ok {
		return fmt.Sprintf("_%02d", id%shardingNum), nil
	}
	return "", fmt.Errorf("invalid column value type")
}

and just migrate table {table_name}_00

2. when override TableName(), and just like this

func (d *dataobject) TableName() string {
	return fmt.Sprintf("table_name_%02d", d.ID%shardingNum)
}

and just migrate table {table_name}_00 and didnot creat any new table