Jarves\ORM\Builder\Propel::addForeignKey PHP Method

    protected function addForeignKey(Object $object, RelationDefinitionInterface $relation, &$xmlTable)
    {
        $relationName = $relation->getName();
        $foreignObject = $this->objects->getDefinition($relation->getForeignObjectKey());
        if (!$foreignObject) {
            throw new ModelBuildException(sprintf('Foreign object `%s` does not exist in relation `%s`', $relation->getForeignObjectKey(), $relation->getName()));
        }
        if ($object->getStorageService() !== $foreignObject->getStorageService()) {
            throw new ModelBuildException(sprintf('Can not create a relation between two different dataModels. Got `%s` but `%s` is needed.', $foreignObject->getStorageService(), $object->getStorageService()));
        }
        $pluralizer = new StandardEnglishPluralizer();
        $foreignPhpName = ucfirst($pluralizer->getSingularForm(lcfirst($relationName)));
        $foreigns = $xmlTable->xpath('foreign-key[@phpName=\'' . $foreignPhpName . '\']');
        if ($foreigns) {
            $foreignKey = current($foreigns);
        } else {
            $foreignKey = $xmlTable->addChild('foreign-key');
        }
        $foreignKey['phpName'] = $foreignPhpName;
        $foreignKey['foreignTable'] = $foreignObject->getTable();
        if ($refName = $relation->getRefName()) {
            $foreignKey['refPhpName'] = ucfirst($pluralizer->getSingularForm(lcfirst($refName)));
        }
        $foreignKey['onDelete'] = $relation->getOnDelete();
        $foreignKey['onUpdate'] = $relation->getOnUpdate();
        if (!$relation->getWithConstraint()) {
            $foreignKey['skipSql'] = 'true';
        }
        $references = $foreignKey->xpath("reference[not(@custom='true')]");
        foreach ($references as $i => $ref) {
            unset($references[$i][0]);
        }
        foreach ($relation->getReferences() as $reference) {
            $localName = Tools::camelcase2Underscore($reference->getLocalColumn()->getName());
            $references = $foreignKey->xpath('reference[@local=\'' . $localName . '\']');
            if ($references) {
                $xmlReference = current($references);
            } else {
                $xmlReference = $foreignKey->addChild('reference');
            }
            $xmlReference['local'] = $localName;
            $xmlReference['foreign'] = Tools::camelcase2Underscore($reference->getForeignColumn()->getName());
        }
        if ($foreignObject->getWorkspace()) {
            if (!$object->getWorkspace()) {
                $columns = $xmlTable->xpath('column[@name=\'workspace_id\']');
                if (!$columns) {
                    $newCol = $xmlTable->addChild('column');
                    $newCol['name'] = 'workspace_id';
                    $newCol['type'] = 'INTEGER';
                    $newCol['defaultValue'] = '1';
                }
            }
            $localName = 'workspace_id';
            $references = $foreignKey->xpath('reference[@local=\'' . $localName . '\']');
            if ($references) {
                $xmlReference = current($references);
            } else {
                $xmlReference = $foreignKey->addChild('reference');
            }
            $xmlReference['local'] = $localName;
            $xmlReference['foreign'] = 'workspace_id';
        }
    }