Create Multi-Level menu in Phalcon - phalcon

Question

I'm trying to create a multi level menu in Phalcon framework from categories table. So far I did this:
MySql table categories:
id parent name count_post
1 0 level_1_name_1 0
2 1 level_2_name_2 0
3 1 level_2_name_3 0
4 2 level_3_name_4 60
5 2 level_3_name_5 30
6 0 level_1_name_6 0
7 6 level_2_name_7 0
8 6 level_2_name_8 0
9 7 level_3_name_9 80
10 7 level_3_name_10 90
I need to create a html like this:
<ul>
<li>
<a>level_1_name_1</a>
<ul>
<li>
<a>level_2_name_2</a>
<ul>
<li><a>level_3_name_4</a></li>
<li><a>level_3_name_5</a></li>
</ul>
</li>
<li>
<a>level_2_name_3</a>
</li>
</ul>
</li>
<li>
<a>level_1_name_6</a>
<ul>
<li>
<a>level_2_name_7</a>
<ul>
<li><a>level_3_name_9</a></li>
<li><a>level_3_name_10</a></li>
</ul>
</li>
<li>
<a>level_2_name_8</a>
</li>
</ul>
</li>
</ul>
In controller I get the data from model:
$menu = Menu::find();
$this->view->setVar('menu', $menu);
But how can I generate HTML in volt template to output like above? Thanks for any help!

Answer 1

Something like this might work for you:
Model
class Menu extends ModelBase
{
public $id;
public $parent;
public $name;
public $count_post;
public function getChilds()
{
$result = false;
if($this->id) {
$childs = self::find("parent = $this->id");
if(count($childs)) {
$result = $childs;
}
}
return $result;
}
}
View
{%- macro print_menu_level(menu_level_items) %}
{%- for menu_item in menu_level_items %}
{% if loop.first %}
<ul>
{% endif %}
<li>
<a>{{ menu_item.name }}</a>
{% set next_menu_level_items = menu_item.getChilds() %}
{% if next_menu_level_items %}
{{ print_menu_level(next_menu_level_items) }}
{% endif %}
</li>
{% if loop.last %}
</ul>
{% endif %}
{%- endfor %}
{%- endmacro %}
{{ print_menu_level(root_menu_items) }}
Controller
$rootMenuItems = Menu::find('parent = 0');
$this->view->setVar('root_menu_items', $rootMenuItems);
DISCLAIMER: That's just an example I didn't tested this_