using event after catalog collection load doesn't get the count right

Question

I'm trying to modify items in a collection on page load (catalog) and using the event: catalog_product_collection_load_after

and the code for the event is :

$observer->getCollection()
            ->addFieldToFilter('entity_id', array('nin' => array_keys($_excludeProducts)))
            ->clear()
            ->load();

this does exclude product(s) but the count is wrong. like there're 5 products in the collection and on the grid as well but the count is 6 items. How can i correct this?

Answer 1

I guess that you can use count() function,But not sure 100%.

Basically count() is give result after load() executed that reason it will give you proper result

 public function count()
    {
        $this->load();
        return count($this->_items);
    }

See at Varien_Data_Collection class.

count() may be give you proper result whenever you remove clear() from collection.As this make collection load false.setIsLoaded(false) and remove all element from Collection

See at function:

 public function clear()
    {
        $this->_setIsLoaded(false);
        $this->_items = array();
        return $this;
    }