Call to a member function tasks() on null on laravel 5 - laravel-5

Question

Let me explain with a couple of word my problem.
On my controller i have this line:
$tasks = $student->group->tasks()->orderBy('created_at', 'desc')->withPivot('id')->get();
This works for existing users, but when i try to create new ones i receive
Call to a member function tasks() on null
Can i with something like this or what do you suggest ?
if(!is_null($tasks))
$tasks = $student->group->tasks()->orderBy('created_at', 'desc')->withPivot('id')->get();
}
This i my show function on controller
public function show(){
$user = Auth::user();
if(!$user)
return redirect('/')->withErrors(config('constants.NA'));
$countries = Country::all()->lists('name', 'id')->toArray();
$profile = $user->profile;
$student = $profile->student;
// Tasks showed on students profile
if ($student->group) {
$tasks = $student->group->tasks()
->orderBy('created_at', 'desc')
->withPivot('id')
->get();
}
// Classmates
if ($student->group) {
$classmates = $student->group->students()
->where('id', '!=', $student->id)
->get();
}
// Activated books
$books = Auth::user()->books()->orderBy('grade_id', 'asc')->get();
if(!is_null($student->group))
$iTasks = $student->group->tasks->count();
else {
$iTasks = 0;
}
$iTodos = $user->todos->count();
return view('student.profile.show',compact('user','profile', 'countries', 'iTasks', 'iTodos', 'tasks', 'classmates', 'books'));
}
This is my show view, for the tasks
<div class="tab-pane <?php if(isset($tab) && $tab == 'timeline'): ?> active <?php endif; ?>" id="timeline">
#if($tasks->count())
<div class="timeline">
#foreach($tasks as $task)
<!-- TIMELINE ITEM -->
<div class="timeline-item">
<div class="timeline-badge">
<div class="timeline-icon">
<i class="mdi mdi-clipboard-text font-red-intense"></i>
</div>
</div>
<div class="timeline-body">
<div class="timeline-body-arrow"> </div>
<div class="timeline-body-head">
<div class="timeline-body-head-caption">
<span class="timeline-body-title font-blue-madison">
{{ $task->professor->profile->user->name }}
</span>
<span class="timeline-body-time font-grey-cascade">ju ca caktuar një detyrë të re.</span>
</div>
</div>
<div class="timeline-body-content">
<span class="font-grey-cascade">
{{ $task->pivot->comment }}
</span>
</div>
<hr>
Lenda: <span class="timeline-body-time font-grey-cascade sbold">{{ $task->subject->name }}</span>
<div class="pull-right">
Krijuar më: <span class="timeline-body-time font-grey-cascade sbold">{{ $task->created_at->format(Config::get('klasaime.date_format')) }}</span>
</div>
</div>
</div>
<!-- END TIMELINE ITEM -->
#endforeach
</div>
#else
<div class="alert">
Ju nuk keni asnje detyrë të caktuar!
</div>
#endif
</div>

Answer 1

Looks to me like you haven't added the student to a group yet, or that somehow hasn't been persisted. If you have added the student to a group after creating and saving the student, try this:
$student->load('group')
Before running:
$tasks = $student->group->tasks()->orderBy('created_at', 'desc')->withPivot('id')->get();
I'll need to see more of your code to give a more accurate answer. But the error you're getting is related to the ->group, of your student, not your student itself.

Answer 2

Do a simple check to see if the group exists and then carry on with whatever action you need to perform.
// controller
$tasks = null;
if ($student->group) {
$tasks = $student->group->tasks()
->orderBy('created_at', 'desc')
->withPivot('id')
->get();
}
// view
#if($tasks)
{{ $tasks->id }}
#else
No tasks found
#endif
Edit : In your controller add $tasks = null; and $classmates = null; at top. And in your view change #if($tasks->count()) to #if($tasks). I'm not sure where your use the classmates variable, but add a check to see if it's null before you use it.