Group_concat with Query builder laravel - sql

Question

Hello! , i have an issue with an sql Call on laravel 5.5 using query builder. when i do this
$result = DB::table(self::$TABLA_COMPONENTE)
->join(self::$TABLA_ARCHIVOS ,self::$TABLA_COMPONENTE.'.com_id','=',self::$TABLA_ARCHIVOS.'.com_id')
->select(self::$TABLA_COMPONENTE.'.*',DB::raw('group_concat('.self::$TABLA_ARCHIVOS.'.ar_url) as com_archivos'))
->where(self::$TABLA_COMPONENTE.'.com_id',$id)->first();
i get the following error
SQLSTATE[42000]: Syntax error or access violation: 1140 Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP columns is illegal if there is no GROUP BY clause (SQL: select componente.*, group_concat(archivos.ar_url) as com_archivos from componente inner join archivos on componente.com_id = archivos.com_id where componente.com_id = 2 limit 1)
this is the raw sql i get by using ->toSql()
This is the sql with ->toSql()
"select `componente`.*, group_concat(archivos.ar_url) as com_archivos from `componente` inner join `archivos` on `componente`.`com_id` = `archivos`.`com_id` where `componente`.`com_id` = ?
And it works fine on Phpmyadmin.
i also tried using Group by with no luck.
If you could help me with a solution I would be very grateful!

Answer 1

This is actually mysql problem not laravel problem. Try add
->groupBy(self::$TABLA_COMPONENTE . '.id')
to you query.
EDITED: something like this one :
$result = DB::table(self::$TABLA_COMPONENTE)
->join(self::$TABLA_ARCHIVOS ,self::$TABLA_COMPONENTE.'.com_id','=',self::$TABLA_ARCHIVOS.'.com_id')
->select(self::$TABLA_COMPONENTE.'.*',DB::raw('group_concat('.self::$TABLA_ARCHIVOS.'.ar_url) as com_archivos'))
->groupBy(self::$TABLA_COMPONENTE . '.id')
->where(self::$TABLA_COMPONENTE.'.com_id',$id)->first();
note : it is not testet