function to display menu from a set level

Question

I have a function that retrieves menu data from Magento and outputs it to a javascript front-end.

  public function getMenuData()
    {
        if (!is_null($this->_menuData)) return $this->_menuData;
        $blockClassName = Mage::getConfig()->getBlockClassName('custommenu/navigation');
        $block = new $blockClassName();
        $categories = $block->getStoreCategories();
        if (is_object($categories)) $categories = $block->getStoreCategories()->getNodes();
        if (Mage::getStoreConfig('custom_menu/general/ajax_load_content')) {
            $_moblieMenuAjaxUrl = str_replace('http:', '', Mage::getUrl('custommenu/ajaxmobilemenucontent'));
            $_menuAjaxUrl = str_replace('http:', '', Mage::getUrl('custommenu/ajaxmenucontent'));
        } else {
            $_moblieMenuAjaxUrl = '';
            $_menuAjaxUrl = '';
        }
        $this->_menuData = array(
            '_block'                        => $block,
            '_categories'                   => $categories,
            '_moblieMenuAjaxUrl'            => $_moblieMenuAjaxUrl,
            '_menuAjaxUrl'                  => $_menuAjaxUrl,
            '_showHomeLink'                 => Mage::getStoreConfig('custom_menu/general/show_home_link'),
            '_popupWidth'                   => Mage::getStoreConfig('custom_menu/popup/width') + 0,
            '_popupTopOffset'               => Mage::getStoreConfig('custom_menu/popup/top_offset') + 0,
            '_popupDelayBeforeDisplaying'   => Mage::getStoreConfig('custom_menu/popup/delay_displaying') + 0,
            '_popupDelayBeforeHiding'       => Mage::getStoreConfig('custom_menu/popup/delay_hiding') + 0,
            '_rtl'                          => Mage::getStoreConfig('custom_menu/general/rtl') + 0,
            '_mobileMenuEnabled'            => Mage::getStoreConfig('custom_menu/general/mobile_menu') + 0,
            '_mobileMenuWidthInit'          => Mage::getStoreConfig('custom_menu/general/mobile_menu_width_init') + 0,
        );
        return $this->_menuData;
    }

I've been trying to find a way to modify it so that I can alter the depth of the menu being initially displayed.

I've tried changing the $categories variable over to a call to

Mage::getModel('catalog/category')->getCollection()->addAttributeToSelect('*')->addAttributeToFilter('level', array('eq'=>3))->addAttributeToFilter('parent_id',array('eq' => $parent_cat_id))->load();

to try and force it to show categories at level 3 whose parent is set by the category ID, but for the life of me I just cant crack this at the moment.

Fabian Schmengler · Accepted Answer · 2015-09-06 09:38:16Z

1

To get all children for a given category $parent_cat_id, use this code:

// load parent if you only have the ID:
$parent = Mage::getModel('catalog/category')->load($parent_cat_id);
// get array of child categories (not a collection!)
$categories = $parent->getChildrenCategories()

All children of a category with level 2 are level 3, so no additional filtering of the level is necessary.

answered Sep 6, 2015 at 9:38

Fabian Schmengler

66.2k25 gold badges192 silver badges423 bronze badges

that worked immediately, the only downside is that it's not displaying sub-categories, or displaying when in the top level (but the latter I can solve)

Duncan Wardlaw
– Duncan Wardlaw

2015-09-07 15:24:55 +00:00
Commented Sep 7, 2015 at 15:24
OK it was not clear to me that you wanted to load subcategories as well. Maybe this answer helps you then: magento.stackexchange.com/a/79165/243

Fabian Schmengler
– Fabian Schmengler

2015-09-07 15:27:55 +00:00
Commented Sep 7, 2015 at 15:27
I've had a peek into this, it seems the function is returning /n instead of the subcategory data, I'm new to objects and I think it could be because categories is assigning data to the $parent class, not the block?

Duncan Wardlaw
– Duncan Wardlaw

2015-09-07 16:52:02 +00:00
Commented Sep 7, 2015 at 16:52

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Duncan Wardlaw · Accepted Answer · 2015-09-10 12:06:24Z

1

In the end it was simpler to create a new menu using existing Magento calls, rather than reverse engineering the existing, however a few bits of code from fscmengler did help in creating this!

I'll try and remove the markdown code to display the structure I came up with in the end as it works quite well!

answered Sep 10, 2015 at 12:06

Duncan Wardlaw

1151 gold badge2 silver badges14 bronze badges

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