public function hasMany($id, $label, $page, $options)
{
$this->internalAddColumn(SQLColumn::CATEGORY_EXTERNAL, $id, array('page_id' => $page->getId(), 'label' => $label, 'type' => ExternalColumn::HAS_MANY, 'foreign_key' => $options['foreign_key'], 'local_key' => $options['local_key']));
}