Migrating old cr data with additional root nodes and their children

[ahaeslich]

Migrating Neos 8 content to Neos 9 will, as of now, migrate all nodes residing below the sites root node. Nodes residing below other root nodes, like e.g. taxonomies, won't be migrated into the new CR.

neos-development-collection/Neos.ContentRepository.LegacyNodeMigration/Classes/NodeDataToEventsProcessor.php

Lines 126 to 142 in 783e08a

	foreach ($this->nodeDataRows as $nodeDataRow) {
	if ($nodeDataRow['path'] === '/sites') {
	$sitesNodeAggregateId = NodeAggregateId::fromString($nodeDataRow['identifier']);
	$this->visitedNodes->addRootNode($sitesNodeAggregateId, $this->sitesNodeTypeName, NodePath::fromString('/sites'), $this->interDimensionalVariationGraph->getDimensionSpacePoints());
	$this->exportEvent(new RootNodeAggregateWithNodeWasCreated($this->contentStreamId, $sitesNodeAggregateId, $this->sitesNodeTypeName, $this->interDimensionalVariationGraph->getDimensionSpacePoints(), NodeAggregateClassification::CLASSIFICATION_ROOT));
	continue;
	}
	if ($this->metaDataExported === false && $nodeDataRow['parentpath'] === '/sites') {
	$this->exportMetaData($nodeDataRow);
	$this->metaDataExported = true;
	}
	try {
	$this->processNodeData($nodeDataRow);
	} catch (MigrationException $exception) {
	return ProcessorResult::error($exception->getMessage());
	}
	}