问题
I have a question about Mage::registry and categories: I'm a on a category page, I retrieve current category by Mage::registry('current_category'). I've noticed that it works only for root categories, in fact if I visit a subcategory page I retrieve always the root category with Mage::registry('current_category'). So the question is: is something about backend configuration, cache or something else?
回答1:
OOB, current_category is set in Mage_Catalog CategoryController::_initCategory() (ref here) and will always be equal to the category currently being viewed.
If your data is different then your app has non-standard functionality or you are seeing cached results.
回答2:
If you are in a template (e.g. catalog/category/view.phtml) you can get the current category with
$this->getCurrentCategory();
If you are in a model, controller or else, try this (found here):
Mage::getModel('catalog/layer')->getCurrentCategory();
However, Mage::registry('current_category') is the normal way to go.
回答3:
For all categories:-
<?php $_helper = Mage::helper('catalog/category') ?>
<?php $_categories = $_helper->getStoreCategories() ?>
For Current Category
<?php $currentCategory = Mage::registry('current_category') ?>
Works for me.
来源：https://stackoverflow.com/questions/10282847/magento-registry-and-current-category