Keying an eager-loaded relationship - laravel

Question

I have a Business model and an Hour model. The Business model overrides the protected $with method to eager load it's hours() hasMany relationship.
When I ::first() a given business I receive something like this:
App\Business {#770
id: 5,
user_id: 5,
name: "Wehner-Hudson",
slug: "wehner-hudson",
lat: "55.33593500",
lng: "112.34818600",
created_at: "2018-01-04 13:00:48",
updated_at: "2018-01-04 13:00:48",
hours: Illuminate\Database\Eloquent\Collection {#753
all: [
App\Hour {#802
id: 13,
business_id: 5,
weekday_id: 3,
open: 1,
split_shift: 1,
},
App\Hour {#803
id: 14,
business_id: 5,
weekday_id: 5,
open: 0,
split_shift: 1,
},
App\Hour {#804
id: 15,
business_id: 5,
weekday_id: 2,
open: 1,
split_shift: 0,
},
],
},
},
],
}
I would like to key the hours: Illuminate\Database\Eloquent\Collection {#753 by weekday_id to facilitate processing on the client side. Something like this:
Illuminate\Database\Eloquent\Collection {#763
all: [
1 => App\Hour {#796
id: 1,
business_id: 1,
weekday_id: 1,
open: 1,
split_shift: 1,
},
5 => App\Hour {#767
id: 2,
business_id: 1,
weekday_id: 5,
open: 0,
split_shift: 0,
},
2 => App\Hour {#765
id: 3,
business_id: 1,
weekday_id: 2,
open: 1,
split_shift: 1,
},
],
}
I tried to use keyBy on the relationship in the Business model:
public function hours()
{
return $this->hasMany(Hour::class)->keyBy('weekday_id');
}
But it is not working, as I believe that at that point the returned object is a builder, not a collection.

Answer 1

Try to define an accessor, like this:
public function getHoursByWeekdayAttribute()
{
return $this->hours->keyBy('weekday_id');
}

Answer 2

What about using groupby in your controller.
Business::with(['hours' => function($query){ $query->groupBy('weekend_id'); }])->get();