/**
* This function is defined to retrieve
* entities having an unique (technical) identifier
* name "id".
*
* @param DBEntity $obj a entity (used for the correct format).
*
*/
function getById($obj, $id)
{
$keys = $obj->getPrimaryColumns();
$where = array();
foreach ($keys as $key => $col) {
$where[$key] = $id;
}
$unique = $this->selectUnique($obj, $where);
return $unique;
}
