public function coursesAction()
 {
     try {
         $id = Input::get('class');
         $courses = Input::get('hiddenCourses');
         $courses_array = explode(',', $courses);
         DB::table('classcourse')->where('class', $id)->delete();
         for ($i = 0; $i < count($courses_array); $i++) {
             if ($courses_array[$i] != "") {
                 $Classcourse = new Classcourse();
                 $Classcourse->class = $id;
                 $Classcourse->course = $courses_array[$i];
                 $Classcourse->save();
             }
         }
         return Redirect::route('admin/classEdit', array('id' => $id));
     } catch (Exception $ex) {
         echo $ex;
         Session::flash('status_error', '');
     }
 }
 public function addCourse()
 {
     try {
         $course_id = Input::get('course_id');
         $classes = explode(',', Input::get('classes'));
         for ($i = 0; $i < count($classes); $i++) {
             if ($classes[$i] != "") {
                 $classcourse = new Classcourse();
                 $classcourse->class = $classes[$i];
                 $classcourse->course = $course_id;
                 $classcourse->save();
             }
         }
         return Redirect::route('teacher/sprints');
     } catch (Exception $ex) {
         echo $ex;
         Session::flash('status_error', '');
     }
 }