getTable(); // Hardcode the table name here, or you can access it using the classMapper and `getTable` $auxTable = 'members'; // Specify columns to load from base table and aux table $builder->addSelect( "$baseTable.*", "$auxTable.city as city", "$auxTable.country as country" ); // Join on matching `member` records $builder->leftJoin($auxTable, function ($join) use ($baseTable, $auxTable) { $join->on("$auxTable.id", '=', "$baseTable.id"); }); } }