entity_definition_updates_8002.inc

<?php


/**
 * @file
 * Defines the 8002 db update for the "entity_definition_updates" group.
 */
require_once 'entity_definition_updates_8001.inc';

/**
 * Makes the 'user_id' field single and migrate its data.
 */
function entity_test_update_8002() {
    // To update the field schema we need to have no field data in the storage,
    // thus we retrieve it, delete it from storage, and write it back to the
    // storage after updating the schema.
    $database = \Drupal::database();
    // Retrieve existing entity data.
    $query = $database->select('entity_test__user_id', 'et')
        ->fields('et', [
        'entity_id',
        'user_id_target_id',
    ]);
    $query->condition('et.delta', 0);
    $user_ids = $query->execute()
        ->fetchAllKeyed();
    // Remove data from the storage.
    $database->truncate('entity_test__user_id')
        ->execute();
    // Update definitions and schema.
    $manager = \Drupal::entityDefinitionUpdateManager();
    $storage_definition = $manager->getFieldStorageDefinition('user_id', 'entity_test');
    $storage_definition->setCardinality(1);
    $manager->updateFieldStorageDefinition($storage_definition);
    // Restore entity data in the new schema.
    foreach ($user_ids as $id => $user_id) {
        $database->update('entity_test')
            ->fields([
            'user_id' => $user_id,
        ])
            ->condition('id', $id)
            ->execute();
    }
}