在laravel中实现ORM模型使用第二个数据库设置

'mysql_branch' => [ 
'driver' => 'mysql', 
'host' => '192.168.2.56', 
'port' => '3306', 
'database' => 'test', 
'username' => 'root', 
'password' => 'root', 
'charset' => 'utf8mb4', 
'collation' => 'utf8mb4_unicode_ci', 
], 

class Branch extends Model 
{ 
//取消时间戳 
public $timestamps = false; 
//链接外部数据库 
protected $connection = 'mysql_branch'; 
}