framework/rbac/DbManager.php
public function getChildren($name)
    {
        $query = (new Query())
            ->select(['name', 'type', 'description', 'rule_name', 'data', 'created_at', 'updated_at'])
            ->from([$this->itemTable, $this->itemChildTable])
            ->where(['parent' => $name, 'name' => new Expression('[[child]]')]);

        $children = [];
        foreach ($query->all($this->db) as $row) {
            $children[$row['name']] = $this->populateItem($row);
        }

        return $children;
    }
public function getChildren($name)
    {
        $query = (new Query())
            ->select(['name', 'type', 'description', 'rule_name', 'data', 'created_at', 'updated_at'])
            ->from([$this->itemTable, $this->itemChildTable])
            ->where(['parent' => $name, 'name' => new Expression('[[child]]')]);

        $children = [];
        foreach ($query->all($this->db) as $row) {
            $children[$row['name']] = $this->populateItem($row);
        }

        return $children;
    }
{@inheritdoc}