/**
* Check if a field on the entity type to update is a possible destination field.
*
* @todo Should this be on our FieldManager service?
*
* @param \Drupal\Core\Field\FieldStorageDefinitionInterface $definition
* Field definition on entity type to update to check.
* @param \Drupal\Core\Field\FieldDefinitionInterface $source_field
* Source field to check compatibility against. If none then check generally.
*
* @return bool
*/
protected function isDestinationFieldCompatible(FieldStorageDefinitionInterface $definition, FieldDefinitionInterface $source_field = NULL)
{
// @todo Create field definition wrapper class to treat FieldDefinitionInterface and FieldStorageDefinitionInterface the same.
if ($definition instanceof BaseFieldDefinition && $definition->isReadOnly()) {
return FALSE;
}
// Don't allow updates on updates!
if ($definition->getType() == 'entity_reference') {
if ($definition->getSetting('target_type') == 'scheduled_update') {
return FALSE;
}
}
if ($source_field) {
$matching_types = $this->getMatchingFieldTypes($source_field->getType());
if (!in_array($definition->getType(), $matching_types)) {
return FALSE;
}
// Check cardinality
$destination_cardinality = $definition->getCardinality();
$source_cardinality = $source_field->getFieldStorageDefinition()->getCardinality();
// $destination_cardinality is unlimited. It doesn't matter what source is.
if ($destination_cardinality != -1) {
if ($source_cardinality == -1) {
return FALSE;
}
if ($source_cardinality > $destination_cardinality) {
return FALSE;
}
}
switch ($definition->getType()) {
case 'entity_reference':
// Entity reference field must match entity target types.
if ($definition->getSetting('target_type') != $source_field->getSetting('target_type')) {
return FALSE;
}
// @todo Check bundles
break;
// @todo Other type specific conditions?
}
}
return TRUE;
}
