MachineName.php in Machine name 8

Namespace

Drupal\machine_name\Plugin\Field\FieldType

File

src/Plugin/Field/FieldType/MachineName.php

<?php

namespace Drupal\machine_name\Plugin\Field\FieldType;

use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemBase;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\Core\TypedData\DataDefinition;

/**
 * Plugin implementation of the 'machine_name' field type.
 *
 * @FieldType(
 *   id = "machine_name",
 *   label = @Translation("Machine name"),
 *   description = @Translation("This field stores varchar text in the database."),
 *   default_widget = "machine_name",
 *   default_formatter = "machine_name"
 * )
 */
class MachineName extends FieldItemBase {

  /**
   * {@inheritdoc}
   */
  public static function schema(FieldStorageDefinitionInterface $field_definition) {
    return [
      'columns' => [
        'value' => [
          'type' => 'varchar',
          'length' => 64,
          'not null' => TRUE,
          'default' => '',
        ],
      ],
      'indexes' => [
        'value' => [
          'value',
        ],
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  public static function propertyDefinitions(FieldStorageDefinitionInterface $field_definition) {
    $properties['value'] = DataDefinition::create('string')
      ->setLabel(t('Machine name'));
    return $properties;
  }

  /**
   * {@inheritdoc}
   */
  public function isEmpty() {
    $value = $this
      ->get('value')
      ->getValue();
    return $value === NULL || $value === '';
  }

  /**
   * {@inheritdoc}
   */
  public function getConstraints() {
    $constraints = parent::getConstraints();
    $constraint_manager = $this
      ->getTypedDataManager()
      ->getValidationConstraintManager();
    $constraints[] = $constraint_manager
      ->create('MachineNameUnique', []);
    return $constraints;
  }

}

Classes

Name	Description
MachineName	Plugin implementation of the 'machine_name' field type.