如何从技术详细信息表中生成显示相应评级的类别树

Question

我有两个表ecategory（id，name，parent_id）和technical_detail（id，tech_interview_id，category_id）

technical_details将category_id作为ecategory表的外键。

如何使用cakePHP 3生成显示技术详细信息表中相应评级的类别树（父子）。

$this->Ecategory->recursive = 2;
$cond['conditions']     = array('Ecategory.parent_id' => 0);
$ecategories = $this->Ecategory->find('all', $cond);

foreach ($ecategories as $k => $row) {
    $cat_ids[] = $row['Ecategory']['id'];
}

$cond['conditions']     = array('Technicaldetail.category_id in' => $cat_ids);
$technicalDetails       = $this->Technicaldetail->find('all', $cond);