MySQL/Eloquent force id by left join even if null - php

Question

I have this query wrote in Eloquent :
return TypeModel::with(['apt' => function($q) use ($id){
$q->leftJoin('build_apt', function($join) use($id){
$join->on('build_apt.id_apt', '=', 'apt.id_apt');
$join->on('build_apt.id_build', '=', DB::raw($id->id_build));
})
}])
->get()
->toJson();
Equivalent SQL :
SELECT *
FROM `apt`
LEFT JOIN `build_apt`
ON `build_apt`.`id_apt` = `apt`.`id_apt`
AND `build_apt`.`id_build` = 1
WHERE `apt`.`id_typeapt` in (1, 2, 3, 4, 5)
I have the result I need except one thing, the id given is null :
[
{"id_typeapt":1,"apt":[
{"id_apt":null,"image_apt":"apt_1.png"},
{"id_aptitude":null,"image_apt":"apt_2.png"}
]
]
How can I force it to look for the id from the table "apt" and not giving me "null" as a result?
Thanks you!
EDIT : Where clause is coming from the with
public function apt(){
return $this->hasMany(AptModel::class, 'id_typeapt', 'id_typeapt');
}
EDIT2 :
id_apt was crushed by the other id_apt with a simple rename I could retrieve the id :
return TypeModel::with(['apt' => function($q) use ($id){
$q->leftJoin('build_apt', function($join) use($id){
$join->on('build_apt.id_apt', '=', 'apt.id_apt');
$join->on('build_apt.id_build', '=', DB::raw($id->id_build));
})
}])->select(DB::raw("*, apt.id_apt as id_apt);
}])

Answer 1

You are using LEFT JOIN, which is what you want, however you have conditions on the joined table in the WHERE clause. This actually turns your LEFT JOIN to an INNER JOIN, since unmatched records will be filtered out by the WHERE clause.
You would need to tweak your Eloquent code in order to generate the following SQL query :
SELECT *
FROM `apt`
LEFT JOIN `build_apt`
ON `build_apt`.`id_apt` = `apt`.`id_apt`
AND `build_apt`.`id_build` = 1
AND `apt`.`id_typeapt` in (1, 2, 3, 4, 5)