Magento – Short Summary on Review Page

You can get all the votes attached to a product with the following code. Note that the setEntityPkFilter is setting the product id.

$votesCollection = Mage::getModel('rating/rating_option_vote')
    ->getResourceCollection()
    ->setEntityPkFilter($productId)
    ->setStoreFilter(Mage::app()->getStore()->getId())
    ->load();

This will give you each type of vote. So in the default shop you will get three items in this collection per review. The ratings are done on price, quality and value.

You could then loop through each of the items in the collection and add them to the star rating. The sample data of a vote item is:

array(10) {
  ["vote_id"]=>
  string(3) "283"
  ["option_id"]=>
  string(1) "9"
  ["remote_ip"]=>
  string(9) "127.0.0.1"
  ["remote_ip_long"]=>
  string(10) "2130706433"
  ["customer_id"]=>
  NULL
  ["entity_pk_value"]=>
  string(2) "27"
  ["rating_id"]=>
  string(1) "2"
  ["review_id"]=>
  string(2) "95"
  ["percent"]=>
  string(2) "80"
  ["value"]=>
  string(1) "4"
}

You have a typo in your code, bracket is in wrong place:

<?php if( count( $this->getReviewsCollection() > 0 ) ): ?>

It should be:

<?php if( count( $this->getReviewsCollection() ) > 0  ): ?>

However, it's better to use this code if you only want to check size of the collection:

<?php if( $this->getReviewsCollection()->getSize() > 0  ): ?>