Trying to write custom handler to extend views_handler_field_term_node_tid

Question

Edit: solved, see first reply for answer.

I am trying to write my views filter handler to extend the views_handler_field_term_node_tid class. I believe I have done everything correctly but I'm having no luck. In my module I have implemented hook_views_api()

/**
* Implements hook_views_api().
*/
function mymodule_views_api() {
  return array(
    'api' => 3,
    'path' => drupal_get_path('module', mymodule') . '/views',
  );
}

Called the handler.inc file and the mymodule.views.inc in the module .info file:

files[] = views/mymodule.views.inc
files[] = views/mymodule_handler_field_term_node_tid.inc

This is the contents of that file:

class mymodule_handler_field_term_node_tid extends views_handler_field_term_node_tid {

  function option_definition() {
    $options = parent::option_definition();
    $options['convert_spaces'] = array('default' => FALSE, 'bool' => TRUE);

    return $options;
  }

  /**
   * Option to replace spaces with hyphens.
   */
  function options_form(&$form, &$form_state) {

    parent::options_form($form, $form_state);

    $form['convert_spaces'] = array(
      '#title' => t('Convert spaces in term names to hyphens'),
      '#description' => t('This allows links to work with Views taxonomy term arguments.'),
      '#type' => 'checkbox',
      '#default_value' => !empty($this->options['convert_spaces']),
    );

  }

  function render_item($count, $item) {
    return $item['name'];
  }

}

And finally I have implemented hook_views_data_alter() in the mymodule.views.inc

/**
 * Implements hook_views_data_alter()
 */
function mymodule_views_data_alter(&$data) {
  $data['node']['term_node_tid'] = array(
    'title' => t('Taxonomy terms on node'),
    'help' => t('Relate nodes to taxonomy terms, specifying which vocabulary or vocabularies to use. This relationship will cause duplicated records if there are multiple terms.'),
    'relationship' => array(
      'handler' => 'views_handler_relationship_node_term_data',
      'label' => t('term'),
      'base' => 'taxonomy_term_data',
    ),
      'field' => array(
      'title' => t('All taxonomy terms'),
      'help' => t('Display all taxonomy terms associated with a node from specified vocabularies.'),
      'handler' => 'mymodule_handler_field_term_node_tid',
      'no group by' => TRUE,
    ),
  );

}

So the weird issue is that running dpm($data); in my mymodule_views_data_alter function before I alter the $data['node']['term_node_tid'] brings up no reference to that data at all. That is being originally defined in taxonomy.views.inc and should be existing in the $data array because I have added the Content: All taxonomy terms field to my test view. I've been pulling out my hair for the last couple hours trying to figure this out with no luck.

Answer 1

You must adjust your module's weight so that it runs after views. Use hook_module_implements_alter or Modules weight

And then you can also change your code in MYMODULE.views.inc to something simpler:

function MYMODULE_views_data_alter(&$data) {
  $data['node']['term_node_tid']['field']['handler'] = 'MYMODULE_handler_field_term_node_tid';
}