Using join in Laravel, toArray method does not work - json

Question

The code works fine like this. no problem with toArray
$restaurants = Restorant::where(['active'=>1])->orderBy('id', 'desc')->limit(10)->get();
$data = [];
$item = [];
foreach ($restaurants as $rest_key => $rest_value) {
$item = $rest_value->toArray();
$item["ratings"] = [];
$item["time_to_prepare_order_in_minutes"] = [];
$ratings = DB::table('ratings')->where('rateable_id', '=', $rest_value->id)->get();
foreach ($ratings as $rating_key => $ratings_value) {
$item["ratings"][] = [
"sub_id" => $ratings_value->id,
"rating" => $ratings_value->rating,
];
}
$configs = DB::table('configs')->where('key','=','time_to_prepare_order_in_minutes')->where('model_id','=',$rest_value->id)->first();
$item["time_to_prepare_order_in_minutes"] = $configs->value;
$data[] = $item;
}
return response()->json([
'data' => $data,
'status' => true
]);
But I don't know how to do this when I use join. I also did this logic. How can I do this better? My aim is to tire the server as little as possible while retrieving data in json format. I tried to do it with DB->with option but it gave different errors.
$restaurants = DB::table('companies')->select('companies.*', 'configs.key', 'configs.value')->leftJoin('configs', 'configs.model_id', '=', 'companies.id')->where('configs.key', '=', 'time_to_prepare_order_in_minutes')->where('companies.active', '=', 1)->orderBy('companies.id', 'desc')->limit(10)->get();
$columns = Schema::getColumnListing('companies');
$data = [];
$item = [];
foreach ($restaurants as $rest_key => $rest_value) {
foreach ($columns as $col_key => $col_value) {
$cKey = $columns[$col_key];
$item[$cKey] = $rest_value->$cKey;
}
$item["ratings"] = [];
$ratings = DB::table('ratings')->where('rateable_id', '=', $rest_value->id)->get();
foreach ($ratings as $rating_key => $ratings_value) {
$item["ratings"][] = [
"sub_id" => $ratings_value->id,
"rating" => $ratings_value->rating,
];
}
$data[] = $item;
}
return response()->json([
'data' => $data,
'status' => true
]);

Answer 1

I found the source of the problem. The -> sign solved my problem.
$data = [];
$item = [];
foreach ($cityRestaurants as $city_key => $city_value) {
$item = $city_value;
$item->ratings = [];
$ratings = DB::table('ratings')->where('rateable_id', '=', $city_value->id)->get();
foreach ($ratings as $rating_key => $ratings_value) {
$item->ratings[] = [
"sub_id" => $ratings_value->id,
"rating" => $ratings_value->rating,
];
}
$configs = DB::table('configs')->where('key','=','time_to_prepare_order_in_minutes')->where('model_id','=',$city_value->id)->first();
$item->time_to_prepare_order_in_minutes = $configs->value;
$data[] = $item;
}