I am building a school management system I want once a teacher gets to the time table section they will be able to see the subjects they are teaching that day and they should also see the room and time but I am receiving this error ‘Attempt to read property “week_id” on null’
the following are the codes

 static public function getMyTimeTable($class_id, $subject_id)
    {
        // return self::where('class_id', '=', $class_id)->delete();
        $getWeek = week1model::getWeekUsingName(date('1'));
 return ClassSubjectTimetable::getRecordClassSubject($class_id, $subject_id, $getWeek->week_id);

    }

this line of code is the one supposed to access the week id but its returning null

 $getWeek = week1model::getWeekUsingName(date('1'));

the following models are working together with the above model
week1 model->this model is supposed to fetch the name from the week table by comparing the name received from the model above

static public function getWeekUsingName($weekName)
    {
        return week1model::where('name', '=', $weekName)->first();
    }

classsubjecttimetable model

 static public function getRecordClassSubject($class_id, $subject_id, $week_id)
    {
        return self::where('class_id', '=', $class_id)->where('subject_id', '=', $subject_id)->where('week_id', '=', $week_id)->first();

    }//

the blade file

@foreach ($getRecord as $value)
    <tr>
        <td> {{$value->id}}</td>
        <td> {{$value->class_name}}</td>
        <td> {{$value->subject_name}}</td>
        <td> {{$value->subject_type}}</td>
        <td>
            @php
                $ClassSubject = $value->getMyTimetable($value->class_id, $value->subject_id);
            @endphp
            @if(!empty($ClassSubject))
                {{date('h:i A', strtotime($ClassSubject->start_time))}}
                to {{date('h:i A', strtotime($ClassSubject->end_time))}}
                <br>
                Room number::{{$ClassSubject->room_number}}
            @endif

        </td>
        <td> {{date('d-m-Y H:i A', strtotime($value->created_at))}}</td>

        <td>
            <a href="{{url('/teacher/my_class_subject/timetable/' . $value->class_id . '/' . $value->subject_id)}}"
                class="btn btn-primary">My
                TimeTable</a>
        </td>

    </tr>
@endforeach

I am trying to display the current day subjects to be taught the time and roon number