Trying to get property of non-object laravel 5 hasOne eloquent -


im trying use hasone relation following error : trying property of non-object (view: /home/vagrant/code/gsup_backend/resources/views/exam/index.blade.php) my models

class session extends model {  /*  * @var string  *  */ protected $table = 'gs_session'; protected $primarykey = 'idsess'; public $timestamps = false; public function exam(){     return $this->belongsto('app\model\exam','idex','idsess'); }}

the exam model

class exam extends model { /* * @var string  */ protected $table = 'gs_exam'; public $timestamps = false; protected $primarykey = 'idex'; /*  * @var string  */ protected $fillable = ['*'];  public function matiere(){     return $this->hasone('app\model\matiere','idmat','idex'); } public function session(){     return $this->hasone('app\model\session','idsess','idex'); } public function personne(){     return $this->hasone('app\model\personne','idper','idex'); }}

my controller action

public function index() {     $exams = exam::all();      return view('exam.index',compact('exams')); }

my view

  @foreach($exams $exam)                         <tr class="gradex">                             <td>{{$exam->personne->prenomper}}  {{$exam->personne->nomper}}</td>                                 <td>{{$exam->matiere->libelleapomat}} </td>                                 <td>{{$exam->session->libellesess}}</td>                             <td class="center">{{$exam->statut}}</td>                             <td class="center">{{$exam->date}}</td>                             <td class="center">{{$exam->heuredeb}}</td>                             <td class="center">{{$exam->heurefin}}</td>                             <td class="center"><span><button class="btn btn-primary">modifier</button></span>                             <span><button class="btn btn-danger">supprimer</button></span>                             </td>                         </tr>                         @endforeach

i think problem right here {{$exam->session->libellesess}}

ive solved problem usign :

 @if($exam->session)      {{$exam->session->libellesess}}   @endif

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