public function ContentEntityBase::onChange in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Entity/ContentEntityBase.php \Drupal\Core\Entity\ContentEntityBase::onChange()

Reacts to changes to a field.

Note that this is invoked after any changes have been applied.

Parameters

string $field_name: The name of the field which is changed.

Throws

\InvalidArgumentException When trying to assign a value to the language field that matches an existing translation.

\LogicException When trying to change:

• The language of a translation.
• The value of the flag identifying the default translation object.

Overrides FieldableEntityInterface::onChange

File

core/lib/Drupal/Core/Entity/ContentEntityBase.php, line 781

Class

ContentEntityBase

Implements Entity Field API specific enhancements to the Entity class.

Namespace

Drupal\Core\Entity

Code

public function onChange($name) {

  // Check if the changed name is the value of any entity keys and if any of
  // those values are currently cached, if so, reset it. Exclude the bundle
  // from that check, as it ready only and must not change, unsetting it could
  // lead to recursions.
  foreach (array_keys($this
    ->getEntityType()
    ->getKeys(), $name, TRUE) as $key) {
    if ($key != 'bundle') {
      if (isset($this->entityKeys[$key])) {
        unset($this->entityKeys[$key]);
      }
      elseif (isset($this->translatableEntityKeys[$key][$this->activeLangcode])) {
        unset($this->translatableEntityKeys[$key][$this->activeLangcode]);
      }

      // If the revision identifier field is being populated with the original
      // value, we need to make sure the "new revision" flag is reset
      // accordingly.
      if ($key === 'revision' && $this
        ->getRevisionId() == $this
        ->getLoadedRevisionId() && !$this
        ->isNew()) {
        $this->newRevision = FALSE;
      }
    }
  }
  switch ($name) {
    case $this->langcodeKey:
      if ($this
        ->isDefaultTranslation()) {

        // Update the default internal language cache.
        $this
          ->setDefaultLangcode();
        if (isset($this->translations[$this->defaultLangcode])) {
          $message = new FormattableMarkup('A translation already exists for the specified language (@langcode).', [
            '@langcode' => $this->defaultLangcode,
          ]);
          throw new \InvalidArgumentException($message);
        }
        $this
          ->updateFieldLangcodes($this->defaultLangcode);
      }
      else {

        // @todo Allow the translation language to be changed. See
        //   https://www.drupal.org/node/2443989.
        $items = $this
          ->get($this->langcodeKey);
        if ($items->value != $this->activeLangcode) {
          $items
            ->setValue($this->activeLangcode, FALSE);
          $message = new FormattableMarkup('The translation language cannot be changed (@langcode).', [
            '@langcode' => $this->activeLangcode,
          ]);
          throw new \LogicException($message);
        }
      }
      break;
    case $this->defaultLangcodeKey:

      // @todo Use a standard method to make the default_langcode field
      //   read-only. See https://www.drupal.org/node/2443991.
      if (isset($this->values[$this->defaultLangcodeKey]) && $this
        ->get($this->defaultLangcodeKey)->value != $this
        ->isDefaultTranslation()) {
        $this
          ->get($this->defaultLangcodeKey)
          ->setValue($this
          ->isDefaultTranslation(), FALSE);
        $message = new FormattableMarkup('The default translation flag cannot be changed (@langcode).', [
          '@langcode' => $this->activeLangcode,
        ]);
        throw new \LogicException($message);
      }
      break;
    case $this->revisionTranslationAffectedKey:

      // If the revision translation affected flag is being set then enforce
      // its value.
      $this
        ->setRevisionTranslationAffectedEnforced(TRUE);
      break;
  }
}