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First of all, I'm quite new in Drupal 7 and I've almost Zero knowledge in coding.

I've create a custom content type (Review - Machine Name: review) with 4 Fivestar Field :

  1. Support - Machine Name: field_support
  2. Performance - Machine Name: field_performance
  3. Value - Machine Name: field_value
  4. Overall - Machine Name: field_overall

I've also created 4 Fivestar Voting tag:

  1. rating_support
  2. rating_value
  3. rating_performance
  4. rating_overall

I want the Overall field to display the average of the other three Fivestar Field. I've followed exactly as written here.

Here is the code that I've used on my template.php:

/**
 * Implements hook_form_alter().
 *
 * Hide average fivestar field from review edit/create form.
 */
function bartik_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == 'review_node_form') {
    // Hide average field, this field is calculated upon node_presave.
    $form['field_overall']['#access'] = FALSE;
  }
}

/**
 * Implements hook_node_presave().
 *
 * Calculates average vote rating.
 */
function bartik_node_presave($node) {
  if ($node->type == 'review') {
    // Get values from 3 axis.
    $rating_support      = entity_metadata_wrapper('node', $node)->field_support->value();
    $rating_value      = entity_metadata_wrapper('node', $node)->field_value->value();
    $rating_performance    = entity_metadata_wrapper('node', $node)->field_performance->value();

    // Calculate and set average axe.
    $rating_overall      = ($rating_support + $rating_value + $rating_performance) / 3;
    // @info: Can't use entity_metadata_wrapper, because '->set' not supported on this field.
    //entity_metadata_wrapper('node', $node)->field_overall->set($rating_overall);
    $node->field_overall['und'][0]['rating'] = $rating_overall;  
  }
}

But The overall fivestar rating field displaying 'no votes yet' after publishing content. How can I fix this, Have I done something wrong?

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