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Issue #3189740 by m.stenta: Cannot rollback farm_migrate_asset_parent group migrations

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This commit is contained in:
Michael Stenta 2021-09-14 19:49:17 -04:00
parent 14bb01e681
commit f3ec44d43e
2 changed files with 28 additions and 7 deletions
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8
docs/hosting/migration.md
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@ -51,18 +51,12 @@ Follow the steps below to migrate your farmOS 1.x data to farmOS 2.x:
drush migrate:import --group=farm_migrate_taxonomy
drush migrate:import --group=farm_migrate_asset
drush migrate:import --group=farm_migrate_area
drush migrate:import --group=farm_migrate_asset_parent
drush migrate:import --group=farm_migrate_sensor_data
drush migrate:import --group=farm_migrate_quantity
drush migrate:import --group=farm_migrate_log
drush migrate:import --group=farm_migrate_plan
7. Confirm that all the above migrations were successful before running the
final migration, which focuses only on populating the "Parents" field of
assets. This migration cannot be rolled back (see
[Issue #3189740](https://www.drupal.org/project/farm/issues/3189740)):
drush migrate:import --group=farm_migrate_asset_parent
To view the status of all farmOS 1.x migrations:
drush migrate:status --tag="farmOS 1.x"

27
modules/core/migrate/src/EventSubscriber/FarmMigrationSubscriber.php
View file

@ -114,6 +114,7 @@ class FarmMigrationSubscriber implements EventSubscriberInterface {
* The row delete event object.
*/
public function onMigratePreRowDelete(MigrateRowDeleteEvent $event) {
$this->deleteAssetParentReferences($event);
$this->deleteLogQuantityReferences($event);
}
@ -278,4 +279,30 @@ class FarmMigrationSubscriber implements EventSubscriberInterface {
}
}
/**
* Delete parent references from assets.
*
* @param \Drupal\migrate\Event\MigrateRowDeleteEvent $event
* The row delete event object.
*/
public function deleteAssetParentReferences(MigrateRowDeleteEvent $event) {
// If the migration is in the farm_migrate_asset or farm_migrate_area
// migration groups, delete all parent references to the destination asset.
// This is necessary because the field is populated by migrations in the
// farm_migrate_asset_parent group, which ONLY set the parent field on
// existing assets, and rolling back those migrations does not remove the
// parent references. This causes entity reference integrity constraint
// errors if an attempt is made to roll back assets that are referenced as
// parents.
$migration = $event->getMigration();
if (isset($migration->migration_group) && in_array($migration->migration_group, ['farm_migrate_asset', 'farm_migrate_area'])) {
$id_values = $event->getDestinationIdValues();
if (!empty($id_values['id'])) {
$this->database->query('DELETE FROM {asset__parent} WHERE parent_target_id = :id', [':id' => $id_values['id']]);
$this->database->query('DELETE FROM {asset_revision__parent} WHERE parent_target_id = :id', [':id' => $id_values['id']]);
}
}
}
}