addPropertyConstraints example

public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
    $fields = parent::baseFieldDefinitions($entity_type);
    $fields += static::ownerBaseFieldDefinitions($entity_type);

    $fields['id'] = BaseFieldDefinition::create('string')
      ->setLabel(new TranslatableMarkup('Workspace ID'))
      ->setDescription(new TranslatableMarkup('The workspace ID.'))
      ->setSetting('max_length', 128)
      ->setRequired(TRUE)
      ->addConstraint('UniqueField')
      ->addConstraint('DeletedWorkspace')
      ->addPropertyConstraints('value', ['Regex' => ['pattern' => '/^[a-z0-9_]+$/']]);

    $fields['label'] = BaseFieldDefinition::create('string')
      ->setLabel(new TranslatableMarkup('Workspace name'))
      ->setDescription(new TranslatableMarkup('The workspace name.'))
      ->setRevisionable(TRUE)
      ->setSetting('max_length', 128)
      ->setRequired(TRUE);

    $fields['uid']
      ->setLabel(new TranslatableMarkup('Owner'))
      ->setDescription(new TranslatableMarkup('The workspace owner.'))
      

/** * {@inheritdoc} */
  public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
    $fields = parent::baseFieldDefinitions($entity_type);

    $fields['path'] = BaseFieldDefinition::create('string')
      ->setLabel(new TranslatableMarkup('System path'))
      ->setDescription(new TranslatableMarkup('The path that this alias belongs to.'))
      ->setRequired(TRUE)
      ->setRevisionable(TRUE)
      ->addPropertyConstraints('value', [
        'Regex' => [
          'pattern' => '/^\//i',
          'message' => new TranslatableMarkup('The source path has to start with a slash.'),
        ],
      ])
      ->addPropertyConstraints('value', ['ValidPath' => []]);

    $fields['alias'] = BaseFieldDefinition::create('string')
      ->setLabel(new TranslatableMarkup('URL alias'))
      ->setDescription(new TranslatableMarkup('An alias used with this path.'))
      ->setRequired(TRUE)
      

public function testAddPropertyConstraints()
    {
        $this->metadata->addPropertyConstraint('firstName', new ConstraintA());
        $this->metadata->addPropertyConstraint('lastName', new ConstraintB());

        $this->assertEquals(['firstName', 'lastName'], $this->metadata->getConstrainedProperties());
    }

    public function testAddMultiplePropertyConstraints()
    {
        $this->metadata->addPropertyConstraints('lastName', [new ConstraintA(), new ConstraintB()]);

        $constraints = [
            new ConstraintA(['groups' => ['Default', 'Entity']]),
            new ConstraintB(['groups' => ['Default', 'Entity']]),
        ];

        $properties = $this->metadata->getPropertyMetadata('lastName');

        $this->assertCount(1, $properties);
        $this->assertEquals('lastName', $properties[0]->getName());
        $this->assertEquals($constraints, $properties[0]->getConstraints());
    }

$fields['uuid']->setDescription(t('The user UUID.'));

    $fields['langcode']->setLabel(t('Language code'))
      ->setDescription(t('The user language code.'))
      ->setDisplayOptions('form', ['region' => 'hidden']);

    $fields['preferred_langcode'] = BaseFieldDefinition::create('language')
      ->setLabel(t('Preferred language code'))
      ->setDescription(t("The user's preferred language code for receiving emails and viewing the site."))
      // @todo: Define this via an options provider once       // https://www.drupal.org/node/2329937 is completed.       ->addPropertyConstraints('value', [
        'AllowedValues' => ['callback' => __CLASS__ . '::getAllowedConfigurableLanguageCodes'],
      ]);

    $fields['preferred_admin_langcode'] = BaseFieldDefinition::create('language')
      ->setLabel(t('Preferred admin language code'))
      ->setDescription(t("The user's preferred language code for viewing administration pages."))
      // @todo: A default value of NULL is ignored, so we have to specify       // an empty field item structure instead. Fix this in       // https://www.drupal.org/node/2318605.       ->setDefaultValue([0 => ['value' => NULL]])
      // @todo: Define this via an options provider once