salesforce-8.x-4.x-dev/modules/salesforce_mapping/src/MappedObjectStorageSchema.php

<?php

namespace Drupal\salesforce_mapping;

use Drupal\Core\Entity\ContentEntityTypeInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema;

/**
 * Defines the mapped object schema handler in order to add some unique keys.
 */
class MappedObjectStorageSchema extends SqlContentEntityStorageSchema {

  /**
   * {@inheritdoc}
   */
  protected function getEntitySchema(ContentEntityTypeInterface $entity_type, $reset = FALSE) {
    $schema = parent::getEntitySchema($entity_type, $reset);
    // Backwards compatibility for salesforce_mapping_update_8001
    // key is too long if length is 255, so we have to wait until the db update
    // fires to avoid WSOD.
    $schema['salesforce_mapped_object']['unique keys'] += [
      'entity__mapping' => [
        'drupal_entity__target_type',
        'salesforce_mapping',
        'drupal_entity__target_id',
      ],
    ];

    $schema['salesforce_mapped_object']['unique keys'] += [
      'sfid__mapping' => [
        'salesforce_mapping',
        'salesforce_id',
      ],
    ];

    $schema['salesforce_mapped_object']['fields']['salesforce_mapping']['length'] =
    $schema['salesforce_mapped_object_revision']['fields']['salesforce_mapping']['length'] =
      EntityTypeInterface::ID_MAX_LENGTH;

    return $schema;
  }

}