public function CerPresetHandler::update in Corresponding Entity References 7.3

Process an entity update. This could be either a normal update done by a user, or a bulk update.

File

includes/CerPresetHandler.inc, line 73

Contains CerPresetHandler.

Class

CerPresetHandler

@class Contains the logic for performing CER operations on a single entity, using a single preset.

Code

public function update() {

  // Get the previous set of reference IDs. $entity->cer->original will return either
  // $entity->original, if it exists, or the current entity. So, if this is a bulk
  // update, $originalIDs will be identical to $this->refIDs.
  $originalIDs = $this->left
    ->getHandler($this->entity->cer->original)
    ->getIDs();

  // If there are any references that were in the previous set but not the current
  // set, delete those backreferences. Under normal circumstances, there will be
  // nothing to delete during a bulk update, since the previous set and current
  // set should be identical.
  $deleted = array_diff($originalIDs, $this->refIDs);
  if ($deleted) {
    $this
      ->delete($deleted);
  }

  // If the previous set is identical to the current set, we'll be processing
  // all existing references (see the first line of $this->insert()).
  $added = array_diff($this->refIDs, $originalIDs);
  $this
    ->insert($added);
}