Php SQL查询到laravel查询生成器-转换

如何将此查询转换为Laravel查询生成

SELECT stocks.* FROM stocks, stocksUnits WHERE stocks.name LIKE '%eg%' OR (stocksUnits.code = stocks.unit and stocksUnits.comment LIKE '%eg%') 

例如：

$datas =  Stocks::where('code','LIKE',"%{$search}%")

请看这个

   $stocks = DB::table(DB::raw('stocks as stock', 'stockUnits as stockUnit'))
     ->select('stock.*')
     ->where('stock.name','LIKE',"%eg%")
     ->orWhere(function($query)
     {
        $query->where('stockUnits.code','=','stock.unit')
        ->where('stockUnits.comment','like','%eg%');
     }
    )

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谢谢。

SQLSTATE[42S22]：找不到列：1054 where子句中的未知列'stockUnit.code'