<?php

namespace App\Committee\Document\Admin;

class Obj extends \App\Committee\Document\AbstractObj
{
    protected function _getFromColumns()
    {
        $columns = parent::_getFromColumns();
        $columns['typeTitle'] = new \Zend_Db_Expr('(' . $this->_getTypeSelect() . ')');
        return $columns;
    }

    protected function _getTypeSelect()
    {
        $select = $this->_db->select();
        $select->from($this->_getPair('DocumentType', 'dt'), 'title')
            ->where('`dt`.`id` = `Document`.`typeId`');
        return $select;
    }

}