How would you do that with Eloquent - Laravel 5.2 - laravel-5

Question

I have this logic in a controller :
// hydratation part 1 (cf son modele)
$matiere->fill($request->all());
// hydratation part 2 with attributes not in the POST
$matiere->id_ecole = Session::get('id_ecole');
$request->has('matiere_inactive') ? $matiere->matiere_inactive = '1' : $matiere->matiere_inactive = null;
if ($matiere->exists) {
$matiere->auteur_modif = Session::get('nom').' '.Session::get('prenom');
} else {
$matiere->auteur_creation = Session::get('nom').' '.Session::get('prenom');
}
I think that the part 2 could be present in the model , instead of the controller (I like to have 'brief' controller).
Is it a good idea ?
If yes how could I do that ?
My model is :
class Matiere extends Model {
protected $table = 'matiere';
protected $primaryKey = 'id_matiere';
protected $fillable = [
'id_matiere',
'code_court_matiere',
'libelle_matiere'
];
public function setCodeCourtMatiereAttribute($value)
{
$this->attributes['code_court_matiere'] = strtoupper($value);
}
public function setLibelleMatiereAttribute($value)
{
$this->attributes['libelle_matiere'] = ucwords($value);
}
}

Answer 1

Laravel 5. 3
you can do that by creating a method on Matiere model.
Here is a simple example:
ExampleController.php
$mat = new \App\Matiere();
$feedback = $mat->addm($request);
Matiere.php
public function addm($request)
{
$this->id_ecole = \Session::get('id_ecole');
$request->has('matiere_inactive') ? $this->matiere_inactive = '1' : $this->matiere_inactive = null;
$this->save();
return $this->id;
}