protected function permitLookupDatasetStorageChanges(DataControllerCallContext $callcontext, DatasetMetaData $originalLogicalDataset, DatasetMetaData $modifiedLogicalDataset) {
$metamodel = data_controller_get_metamodel();
$originalPrimaryKeyColumnName = $originalLogicalDataset->getKeyColumn()->name;
// checking if the primary key changed
$doesPrimaryKeyMatch = FALSE;
$modifiedPrimaryKeyColumnNames = $modifiedLogicalDataset->findKeyColumnNames();
if (count($modifiedPrimaryKeyColumnNames) == 1) {
$modifiedPrimaryKeyColumnName = reset($modifiedPrimaryKeyColumnNames);
$doesPrimaryKeyMatch = $originalPrimaryKeyColumnName == $modifiedPrimaryKeyColumnName;
}
if ($doesPrimaryKeyMatch) {
return;
}
// checking if this dataset was used as lookup somewhere
foreach ($metamodel->datasets as $dataset) {
foreach ($dataset->getColumns(FALSE, TRUE) as $column) {
if ($column->type->getReferencedDatasetName() == $originalLogicalDataset->name) {
throw new IllegalArgumentException(t(
'%datasetName dataset is referenced by other datasets. Changes to the primary key is not permitted unless the references are removed first',
array('%datasetName' => $modifiedLogicalDataset->publicName)));
}
}
}
}
