protected function saveManyToMany(array $relationship, $alias, Collection $collection, EntityMetadata $childMetadata, $ourValue, $ourField, $theirField)
{
if (!empty($this->relationshipCascade[$alias])) {
/** @var RepositoryInterface $childRepo */
$childRepo = $this->relationshipCascade[$alias];
// save all entities currently in the collection
foreach ($collection->getAddedEntities() as $child) {
$childRepo->save($child);
}
}
// We will be doing operations on an intermediary join table. As Reposition works with EntityMetadata, we
// need to create the metadata for the intermediary
$intermediaryMetadata = $this->metadataProvider->getEntityMetadataForIntermediary($relationship[EntityMetadata::METADATA_RELATIONSHIP_JOIN_TABLE]);
// generate the relationship metadata used on this collection
$intermediaryRelationship = [EntityMetadata::METADATA_RELATIONSHIP_TYPE => EntityMetadata::RELATIONSHIP_TYPE_MANY_TO_ONE];
$manyToManyRelationships = ["ours" => $this->entityMetadata->getCollection() . "_" . $ourField, "theirs" => $childMetadata->getCollection() . "_" . $theirField];
foreach ($manyToManyRelationships as $relationshipAlias => $intermediaryOurField) {
$intermediaryRelationship[EntityMetadata::METADATA_RELATIONSHIP_OUR_FIELD] = $intermediaryOurField;
$intermediaryRelationship[EntityMetadata::METADATA_RELATIONSHIP_ALIAS] = $relationshipAlias;
$intermediaryMetadata->addRelationshipMetadata($this->entityMetadata->getEntity(), $intermediaryRelationship);
}
// process added and removed children
$added = $collection->getAddedEntities();
$removed = $collection->getRemovedEntities();
if (!empty($added)) {
$insert = $this->queryBuilder->save($intermediaryMetadata, ["saveType" => "insert"]);
// create an array of values to use, for each entity we're adding
foreach ($added as $child) {
// we have to use the actual field names here as we're saving an array, rather than a class instance
$entityArray = [$manyToManyRelationships["ours"] => $ourValue, $manyToManyRelationships["theirs"] => $childMetadata->getEntityValue($child, $theirField)];
$insert->entity($entityArray);
}
$this->doQuery($insert, ["output" => "raw"]);
}
if (!empty($removed)) {
$delete = $this->queryBuilder->delete($intermediaryMetadata);
// delete rows where the parent value is X and the child value is in the list
$filters = ["ours" => $ourValue, "theirs" => $this->condition("in", $removed)];
$this->createWhereFromFilters($delete, $filters);
$this->doQuery($delete, ["output" => "raw"]);
}
}
