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I implemented hook_entity_bundle_field_info_alter() to add validation to fields of a node type. I got $bundle as an argument in the hook and I need to pass it in $options argument like below:

$fields['field_tags']->addConstraint('NodeValidate', $bundle);

How can I access this argument in NodeValidateConstraintValidator? Am I passing the argument correctly?

$options provided in addConstraint can be accessed in the constructor using parent::__construct($options) in __construct() function build the options.

hook_entity_base_field_info_alter() doesn't contain a $bundle argument, as it is defined as function hook_entity_base_field_info_alter(&$fields, \Drupal\Core\Entity\EntityTypeInterface $entity_type). How can I validate the base field for a particular node type?

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  1. Options needs to be an array I think. You can access it on the constraint object in your validator, see ListStringItem::propertyDefinitions() and LengthValidator, which then uses it as $constraint->max.

  2. Base fields are exactly that. Base fields. There is no bundle, they are the same for all bundles of an entity type (they can be overriden per-bundle, but then they become accessible in the bundle hook).

  3. You shouldn't ask two different questions together :)

  • Sorry for asking two questions on a single post. I'm a bit lazy :( . Can you please explain the 2nd point that states overriding per-bundle. If i need to validate title field of a particular node type which hook should I use? – Pravin Ajaaz Jun 26 '15 at 7:18
  • I looked at propertyDefinitions() and LengthValidator and tried to do the same but it just throwed me an error. I think there is something to do with constructor in Length.php . But I can't get it – Pravin Ajaaz Jun 26 '15 at 10:39
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To pass arguments in addConstraint() something like:

$fields['field_tags]->addConstraint('NodeValidate', array('bundle' => 'article));

You should create a constructor in NodeValidateConstraint.php and calling the parent constructor like below:

You should need to declare a property name same as the name of the key in the options you passed. In this case it is bundle.

class NodeValidateConstraint extends Constraint {
  public $bundle;
  public function __construct($options = null)
  {
      parent::__construct($options);
  }
}

Now you could access the $options in NodeValidateConstraintValidator.php as

$bundle_name = $constraint->bundle;

Thanks berdir for guiding me in this and continuously responding to my queries in drupal 8:)

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