How to add calculated field to eloquent selection in Laravel?

Question

MySQL

Good evening. Tricky question. How to make that during selection of the list of models by a method The connected User models had a field which is calculated during selection. That is, somehow assign a method to it. This is necessary to search for the associated model by user name.
$Projects = Project::with('user')->all();
selectRaw("CONCAT(f_name, f_name) as name")

Answer 1

$projects = Project::with(['user' => function ($query) {
    return $query->selectRaw('users.*, CONCAT(users.f_name, users.f_name) as name');
}])->all();

Answer 2

Make a method on User:

public function getNameAttribute()
{
    return $this->attributes['f_name'] . $this->attributes['f_name'];
}

And then just call:
$project->user->name;