Pimcore\Model\Element\Note\Dao::getById PHP Method

    public function getById($id)
    {
        $data = $this->db->fetchRow("SELECT * FROM notes WHERE id = ?", $id);
        if (!$data["id"]) {
            throw new \Exception("Note item with id " . $id . " not found");
        }
        $this->assignVariablesToModel($data);
        // get key-value data
        $keyValues = $this->db->fetchAll("SELECT * FROM notes_data WHERE id = ?", $id);
        $preparedData = [];
        foreach ($keyValues as $keyValue) {
            $data = $keyValue["data"];
            $type = $keyValue["type"];
            $name = $keyValue["name"];
            if ($type == "document") {
                if ($data) {
                    $data = Document::getById($data);
                }
            } elseif ($type == "asset") {
                if ($data) {
                    $data = Asset::getById($data);
                }
            } elseif ($type == "object") {
                if ($data) {
                    $data = Object\AbstractObject::getById($data);
                }
            } elseif ($type == "date") {
                if ($data > 0) {
                    $date = new \DateTime();
                    $date->setTimestamp($data);
                    $data = $date;
                }
            } elseif ($type == "bool") {
                $data = (bool) $data;
            }
            $preparedData[$name] = ["data" => $data, "type" => $type];
        }
        $this->model->setData($preparedData);
    }