function content_taxonomy_update_7100 in Content Taxonomy 7

Fix the default values converted from D6. These values had an empty 'value' value which could cause errors on D7.

File

./content_taxonomy.install, line 35

(Un-) installation tasks for content taxonomy.

Code

function content_taxonomy_update_7100() {
  $params = array(
    'type' => 'taxonomy_term_reference',
  );
  foreach (field_read_fields($params) as $field) {
    foreach (field_read_instances(array(
      'field_name' => $field['field_name'],
    )) as $instance) {

      // If the 'default_value' item doesn't exist there's no point in
      // continuing.
      if (!isset($instance['default_value'])) {
        continue;
      }

      // Keep track of whether fields are actually changed.
      $updated = FALSE;

      // Fix each of the default values.
      foreach ($instance['default_value'] as $key => $defaults) {

        // Need to check isset() and is_null() because the value could be NULL.
        if (isset($instance['default_value'][$key]['value']) || is_null($instance['default_value'][$key]['value'])) {

          // Remove any empty 'value' strings.
          if (empty($instance['default_value'][$key]['value'])) {
            unset($instance['default_value'][$key]['value']);
            $updated = TRUE;
          }
          elseif (!isset($instance_value['default_value'][$key]['tid'])) {
            $instance_value['default_value'][$key]['tid'] = $instance_value['default_value'][$key]['value'];
            unset($instance_value['default_value'][$key]['value']);
            $updated = TRUE;
          }

          // Look for a junk value carried over from D6.
          if (isset($instance['default_value'][$key]['_error_element'])) {
            unset($instance['default_value'][$key]['_error_element']);
            $updated = TRUE;
          }

          // If the array is empty, just remove it.
          if (empty($instance['default_value'][$key])) {
            unset($instance['default_value'][$key]);
            $updated = TRUE;
          }
        }
      }

      // If there are no default values left, just remove it.
      if (empty($instance['default_value'])) {
        unset($instance['default_value']);
        $updated = TRUE;
      }

      // If the field's definition was changed, save it.
      if ($updated) {
        field_update_instance($instance);
        drupal_set_message(t('Fixed configuration of the "@field_name" field ("@type" content type).', array(
          '@field_name' => $instance['field_name'],
          '@type' => $instance['bundle'],
        )));
      }
    }
  }
}