How to get the current category name in an observer in magento 1

Question

I want to get the name of current category name of a product after add to cart for this I'm using this $category = Mage::registry('current_category') but it shows null on observer.

so which observer I should call to get this value after add to cart the product.

Please help me thank you.

Answer 1

You should use following way to get product's categories in observer.

Declare event observers in config.xml

<events>
    <checkout_cart_product_add_after>
        <observers>
            <custommodule>
                <class>custommodule/observer</class>
                <method>cartProductAddAfter</method>
            </custommodule>
        </observers>
    </checkout_cart_product_add_after>
    <checkout_cart_product_update_after>
        <observers>
            <custommodule>
                <class>custommodule/observer</class>
                <method>cartProductUpdateAfter</method>
            </custommodule>
        </observers>
    </checkout_cart_product_update_after>
</events>

Develop the Observers handlers

class Vendor_Custommodule_Model_Observer 
{
    /* If you'd like to do the same while updating the shopping cart*/
    public function cartProductUpdateAfter($observer)
    {
        $this->cartProductAddAfter($observer);
    }

    public function cartProductAddAfter($observer)
    {
        $product_id = $observer->getEvent()->getProduct()->getId();

        //Get the category ids
        $product = Mage::getModel('catalog/product')->load($product_id);
        $cats = $product->getCategoryIds();

        //One product can associate with more then one categories. 
        foreach ($cats as $category_id) {
            $_cat = Mage::getModel('catalog/category')->setStoreId(Mage::app()->getStore()->getId())->load($category_id);
            echo $_cat->getName();             
        }
    }
}

Another way

public function cartProductAddAfter($observer)
    {
        $_product = $observer->getEvent()->getProduct();
        $catIds = $_product->getCategoryIds();
        $catCollection = Mage::getResourceModel('catalog/category_collection')
                         ->addAttributeToSelect('*')
                         ->addAttributeToFilter('entity_id', $catIds)
                         ->addIsActiveFilter();

        foreach($catCollection as $cat){
            print_r($cat->getData());
            //echo $cat->getName();
            //echo $cat->getUrl();
        }
    }

Answer 2

You should not use $category = Mage::registry('current_category') while adding a product to cart.

You can do the following.

//Get the category ids
$product = Mage::getModel('catalog/product')->load($product_id);
$cats = $product->getCategoryIds();

One product can associate with more then one categories.

foreach ($cats as $category_id) {
    $_cat = Mage::getModel('catalog/category')->setStoreId(Mage::app()->getStore()->getId())->load($category_id);
        echo $_cat->getName();             
    }

Answer 3

in config.xml singleton Customization_Holdcategory_Model_Observer categorypath

<checkout_cart_product_add_after>
    <observers>
        <holdcategoryi>
            <type>singleton</type>
            <class>Customization_Holdcategory_Model_Observer</class>
            <method>cartProductAddAfter</method>
        </holdcategoryi>
    </observers>
</checkout_cart_product_add_after>
<checkout_cart_product_update_after>
    <observers>
        <holdcategoryii>
            <type>singleton</type>
            <class>Customization_Holdcategory_Model_Observer</class>
            <method>cartProductUpdateAfter</method>
        </holdcategoryii>
    </observers>
</checkout_cart_product_update_after>

in observer.php

<?php

class Customization_Holdcategory_Model_Observer { protected $_myDropdownValue;

public function categorypath(Varien_Event_Observer $observer)
{
    $categoryId = '';
    if ($category = Mage::registry('current_category')) {
        Mage::getSingleton('core/session')->setcurrentid($category->getId());
        echo $category->getId();
    }
}
/* If you'd like to do the same while updating the shopping cart*/
public function cartProductUpdateAfter($observer)
{
    $this->cartProductAddAfter($observer);
}

public function cartProductAddAfter($observer)
{
    $currentcatid = Mage::getSingleton('core/session')->getcurrentidl();
    $_product = $observer->getEvent()->getProduct();
    $catIds = $_product->getCategoryIds();
    $catCollection = Mage::getResourceModel('catalog/category_collection')
                     ->addAttributeToSelect('*')
                     ->addAttributeToFilter('entity_id', $catIds)
                     ->addIsActiveFilter();

    foreach($catCollection as $cat){
        if($currentcatid == $cat->getId())
        echo "<br>".$cat->getId();
    }die;
}

}

?>