some queyr work to remember later

gistfile1.txt

/**
function islandora_node_insert(NodeInterface $node) {
  _node_index($node);
}

function islandora_node_update(NodeInterface $node) {
  dsm("IN NODE UPDATE");
  _node_index($node);
}

function _node_index(NodeInterface $node) {
  $provider = new NodeContextProvider($node);
  $provided = $provider->getRuntimeContexts([]);

  $context_manager = \Drupal::service('context.manager');
  $context_manager->evaluateContexts($provided);

  foreach ($context_manager->getActiveReactions('index') as $reaction) {
    $reaction->execute($node);
  }
}

function islandora_media_insert(MediaInterface $media) {
  _media_index($media);
}

function islandora_media_update(MediaInterface $media) {
  dsm("IN MEDIA UPDATE");
  _media_index($media);
}

function _media_index(MediaInterface $media) {
  // Create a context for the media.
  $provider = new MediaContextProvider($media);
  $provided = $provider->getRuntimeContexts([]);

  $nids = _get_referencing_nodes($media);

  _execute_context_reactions('index', $nids, $media, $provided);
}

// I AM TRYING TO FIGURE OUT WHERE THE QUERY EXCEPTION IS COMING FROM
function _get_referencing_nodes(MediaInterface $media) {
  // Get all node fields that are entity references to Media.
  $fields = \Drupal::entityQuery('field_storage_config')
    ->condition('entity_type', 'node')
    ->condition('type', 'entity_reference')
    ->condition('settings.target_type', 'media')
    ->execute();

  // Process field names, stripping off 'node.' and appending 'target_id'
  $conditions = array_map(
    function($field) { return ltrim($field, 'node.') . '.target_id'; },
    $fields
  ); 

  if (empty($conditions)) {
    return [];
  }

  // I'm RIGHT HERE
  // Get all nodes that reference this media.
  $query = \Drupal::entityQuery('node', 'OR');
  foreach ($conditions as $condition) {
    $query->condition($condition, $media->id());
  }

  return $query->execute();
}

function _execute_context_reactions($reaction_type, $nids, $entity, array $provided) {
  $context_manager = \Drupal::service('context.manager');
  // If there are no referencing nodes, just fire the reactions with the Media in context.
  if (empty($nids)) {
    $context_manager->evaluateContexts($provided);
    foreach ($context_manager->getActiveReactions($reaction_type) as $reaction) {
      $reaction->execute($entity);
    }
  }
  // Otherwise, fire reactions per node / media combo.
  else {
    dsm($nids);
    foreach ($nids as $nid) {
      $node = \Drupal\node\Entity\Node::load($nid);
      if (!$node) {
        continue;
      }
      $provider = new NodeContextProvider($node);
      $context_manager->evaluateContexts($provided + $provider->getRuntimeContexts([]));
      foreach ($context_manager->getActiveReactions($reaction_type) as $reaction) {
        $reaction->execute($entity);
      }
    }
  }
}

function _file_index(FileInterface $file) {
  $provider = new FileContextProvider($file);
  $provided = $provider->getRuntimeContexts([]);

  $references = file_get_file_references($file, NULL, \Drupal\Core\Entity\EntityStorageInterface::FIELD_LOAD_CURRENT, NULL);

  // Ignore Drupal thumbnails.
  unset($references['thumbnail']);

  foreach ($references as $field => $reference) {
    foreach ($reference['media'] as $media) {
      $provider = new MediaContextProvider($media);
      _execute_context_reactions(
        'index',
        _get_referencing_nodes($media),
        $media,
        $provider->getRuntimeContexts([]) + $provided
      );
    }
  }
}

function islandora_file_insert(FileInterface $file) {
  _file_index($file);
}

function islandora_file_update(FileInterface $file) {
  _file_index($file);
}
*/