Stuff

public function executeShow(){    $this->forward404Unless($this->hasRequestParameter('permalink') > 0);    $pager   = new sfPropelPager('Product');    $pager->init();    $pager->setCursor($this->getRequestParameter('permalink'));    $this->previous = $pager->getPrevious();    $this->product  = $pager->getCurrent();    $this->next     = $pager->getNext();}