/**
* Display a listing of the resource.
*
* @return \Illuminate\Http\Response
*/
public function examAverageChart()
{
$exam_id = Input::get('exam_id');
$examAvg = Exam::find($exam_id)->marks->avg('obt_marks');
$jsonExamAvg = json_encode($examAvg);
return $jsonExamAvg;
}
/**
* Update the specified resource in storage.
*
* @param \Illuminate\Http\Request $request
* @param int $id
* @return \Illuminate\Http\Response
*/
public function update(Request $request, $id)
{
$exams = Exam::find($request->exam);
$exams->grades()->sync($request->input('grade_id'));
return redirect('principal/create#exam-tab')->withInput();
}
/**
* Remove the specified resource from storage.
*
* @param int $id
* @return \Illuminate\Http\Response
*/
public function destroy($id)
{
Exam::find($id)->delete();
return redirect('author/materialimage');
}
