Laravel: Conditionally call laravel accesor when I want in controller?

in my laravel app controller I want to retrieve chats where a user participates, I append user id to the request itself and then in controlelr I create a laravel model accesor called chat_receiver, if I append this accesor everytime I retrieve the chat model I get the chat_receiver too, that way I don't retrive both chat participants (user_id,receiver_id), howver I DON'T ALWAYS WANT to get accesor.

So the question, is there a way to call the accesor in controller whenever I need instead of appending it, like how I can use Model::with([ 'relationship ])...

My accessor on Chat Model:

public function getChatReceiverAttribute()
{
$request = resolve(Request::class);
$user_id = $request->get('user_id', false);
if($user_id)
{
if($user_id == $this->user->id)
{
//return $this->receiver;
return 
[
'id' => $this->receiver->id,
'name' => $this->receiver->name,
'lat' => $this->receiver->lat,
'lng' => $this->receiver->lng,
'images' => $this->receiver->images,
'sexuality' => $this->receiver->sexuality,
'birthYear' => $this->receiver->birthYear,
'birthMonth' => $this->receiver->birthMonth,
'birthDay' => $this->receiver->birthDay,
'gender' => $this->receiver->gender,
'fcm_token' => $this->user->fcm_token,
'languageCode' => $this->user->languageCode,
'mood' => $this->user->mood,
'description' => $this->user->description,
];
}
else
{
//return $this->user;
return 
[
'id' => $this->user->id,
'name' => $this->user->name,
'lat' => $this->user->lat,
'lng' => $this->user->lng,
'images' => $this->user->images,
'sexuality' => $this->user->sexuality,
'birthYear' => $this->user->birthYear,
'birthMonth' => $this->user->birthMonth,
'birthDay' => $this->user->birthDay,
'gender' => $this->user->gender,
'fcm_token' => $this->user->fcm_token,
'languageCode' => $this->user->languageCode,
'mood' => $this->user->mood,
'description' => $this->user->description,
];
}
}
else
{
return [];
}
}

Thanks in advance.

Instead of adding it to the appends array. You can add it programatically when you need it. If you look at the code for the Model trait HasAttributes.php. You can see you can add appended attributes on demand. For this is used the higher order function collection helper.

Model::where('something', 'something')
->get()
->each
->append(['chat_receiver']);

Adding it for a single model would be.

$model->append(['chat_receiver']);