function linked_field_uninstall in Linked Field 7

Implements hook_uninstall().

We have to remove Linked Field settings from all fields and views.

File

./linked_field.install, line 24

Contains install and update functions for Linked Field.

Code

function linked_field_uninstall() {

  // Getting all fields.
  $field_info = field_info_fields();
  $fields = array();
  foreach ($field_info as $field) {
    foreach ($field['bundles'] as $entity_type => $bundles) {
      foreach ($bundles as $bundle) {

        // Getting field instance and modify the settings.
        $instance = db_select('field_config_instance', 'fci')
          ->fields('fci', array(
          'data',
        ))
          ->condition('field_name', $field['field_name'])
          ->condition('entity_type', $entity_type)
          ->condition('bundle', $bundle)
          ->execute()
          ->fetchField();
        $instance = unserialize($instance);
        foreach ($instance['display'] as &$display) {
          unset($display['settings']['linked_field']);
        }
        $instance = serialize($instance);

        // Finally we update the current field instance.
        db_update('field_config_instance')
          ->fields(array(
          'data' => $instance,
        ))
          ->condition('field_name', $field['field_name'])
          ->condition('entity_type', $entity_type)
          ->condition('bundle', $bundle)
          ->execute();
      }
    }
  }

  // Clear caches.
  field_cache_clear();
  if (db_table_exists('views_display')) {

    // Getting all view displays from database.
    $view_displays = db_select('views_display', 'vd')
      ->fields('vd')
      ->execute();

    // Iterate all view displays and modify them.
    foreach ($view_displays as $view_display) {
      $vid = $view_display->vid;
      $id = $view_display->id;
      $display_options = unserialize($view_display->display_options);
      if (isset($display_options['fields'])) {
        foreach ($display_options['fields'] as &$field) {
          $settings =& $field['settings'];
          if (isset($settings['linked_field'])) {
            unset($settings['linked_field']);
          }
        }
      }
      $display_options = serialize($display_options);

      // Finally we update the current view display.
      db_update('views_display')
        ->fields(array(
        'display_options' => $display_options,
      ))
        ->condition('vid', $vid)
        ->condition('id', $id)
        ->execute();
    }
  }
}