cakephp truncate helper not working

e.g. (file = views/elements/photos/tag.ctp)

In this element I have to show a description about that photo. I want to truncate the description text, so i'm using the Truncate function of the Text Core Helper but this throws the following exception

echo $this->Text->truncate($photo['Photo']['description'], 30,array(  'ending' => '...', 'exact' => false,'html' => true ));

Fatal error: Call to a member function truncate() on a non-object开发者_如何学Python i

Next time, please post the full error message.

It looks like you didn't include the helper within the Controller you are using here.

Make sure, you have the following within your controller:

var $helpers = array('Text');