function DataDefinition::getConstraints

Overrides DataDefinitionInterface::getConstraints

File

core/lib/Drupal/Core/TypedData/DataDefinition.php, line 261

Class

DataDefinition

A typed data definition class for defining data based on defined data types.

Namespace

Code

public function getConstraints() {
    $constraints = $this->definition['constraints'] ?? [];
    $constraints += $this->getTypedDataManager()
        ->getDefaultConstraints($this);
    // If either the constraints defined on this data definition or the default
    // constraints for this data definition's type contain the `NotBlank`
    // constraint, then prevent a validation error from `NotBlank` if `NotNull`
    // already would generate one. (When both are present, `NotBlank` should
    // allow a NULL value, otherwise there will be two validation errors with
    // distinct messages for the exact same problem. Automatically configuring
    // `NotBlank`'s `allowNull: true` option mitigates that.)
    // @see ::isRequired()
    // @see \Drupal\Core\TypedData\TypedDataManager::getDefaultConstraints()
    if (array_key_exists('NotBlank', $constraints) && $this->isRequired()) {
        assert(array_key_exists('NotNull', $constraints));
        $constraints['NotBlank']['allowNull'] = TRUE;
    }
    return $constraints;
}