wanyue_app/app/model/DeviceLedger.php

<?php

namespace app\model;

use support\Model;

class DeviceLedger extends Model
{
    protected $table = 'device_ledger';

    protected $primaryKey = 'device_ledger_id';

    protected $dateFormat = 'U';

    const CREATED_AT = 'device_ledger_addtimes';

    const UPDATED_AT = null;
}