elementcountfieldassembler.php

<?php
 
namespace Bitrix\Iblock\Grid\Row\Assembler;
 
use Bitrix\Iblock\Grid\RowType;
use Bitrix\Main\Grid\Row\FieldAssembler;
use CIBlockSection;
 
final class ElementCountFieldAssembler extends FieldAssembler
{
    public function __construct()
    {
        parent::__construct([
            'ELEMENT_CNT',
        ]);
    }
 
    protected function prepareRow(array $row): array
    {
        $value = '';
 
        $id = (int)($row['data']['ID'] ?? 0);
        $rowType = $row['data']['ROW_TYPE'] ?? null;
        if ($id > 0 && $rowType === RowType::SECTION)
        {
            $count = (int)($row['data']['ELEMENT_CNT'] ?? 0);
            $allCount = CIBlockSection::GetSectionElementsCount($id, ['CNT_ALL' => 'Y']);
 
            $value = "{$count} ({$allCount})";
        }
 
        $row['columns'] ??= [];
        $row['columns']['ELEMENT_CNT'] = $value;
 
        return $row;
    }
}