Laravel Eloquent Nested Group by its Relation - php

Question

Please help me how to add another nested group by based on game category relation. I have 3 tables related using laravel 5.4 eloquent.
Game Providers Table
+----+-------------+--------------+------------------+
| id | game_name | game_type_id | game_category_id |
+----+-------------+--------------+------------------+
| 1 | Sample | 1 | 1 |
| 1 | Sample 0 | 1 | 2 |
| 2 | Sample 1 | 2 | 1 |
| 3 | Sample 2 | 2 | 2 |
+----+-------------+--------------+------------------+
Game Types
+----+-------------+
| id | name |
+----+-------------+
| 1 | Chess |
| 2 | Poker |
+----+-------------+
Game Categories
+----+-------------+
| id | name |
+----+-------------+
| 1 | Recommended |
| 2 | Optional |
+----+-------------+
I'm done of for first nested for game type relation but i dont know how to add another group by for game categories
$game_providers = GameProvider::all();
$game_providers = $game_providers->groupBy(function ($game_provider) {
return $game_provider->game_type->name;
})->all();
and its output
Array{
'Chess' => Array{
0 => Array{
'id' => 1,
'game_name' => 'Sample',
'game_type_id' => 1,
'game_category_id' => 2
},
1 => Array{
'id' => 2,
'game_name' => 'Sample 0',
'game_type_id' => 1,
'game_category_id' => 2
},
},
'Poker' => Array{
0 => Array{
'id' => 3,
'game_name' => 'Sample 1',
'game_type_id' => 2,
'game_category_id' => 1
},
1 => Array{
'id' => 4,
'game_name' => 'Sample 2',
'game_type_id' => 2,
'game_category_id' => 2
},
},
}
My expected output
Array{
'Chess' => Array{
'Recommended' => Array{
0 => Array{
'id' => 1,
'game_name' => 'Sample',
'game_type_id' => 1,
'game_category_id' => 2
}
},
'Optional' => Array{
0 => Array{
'id' => 2,
'game_name' => 'Sample 0',
'game_type_id' => 1,
'game_category_id' => 2
}
}
},
'Poker' => Array{
'Recommended' => Array{
0 => Array{
'id' => 3,
'game_name' => 'Sample 1',
'game_type_id' => 2,
'game_category_id' => 1
}
},
'Optional' => Array{
0 => Array{
'id' => 4,
'game_name' => 'Sample 2',
'game_type_id' => 2,
'game_category_id' => 2
}
}
}
}

Answer 1

With L5, one way of acieving this can be:
GameProvider::with('game_categories.game_types')
->get()
->groupBy([
'gameTypes.name',
'gameCategories.name'
]);

Answer 2

Should be something along the lines of :
GameProvider::with('game_categories.game_types')->get()->map(function ($game) {
return $game->game_categories->groupBy('name')->map(function ($catGame) {
return $catGame->map(function ($category) {
return $category->game_types->groupBy('name');
});
});
});