public function run()
 {
     $faker = faker::create();
     $students = student::all()->lists('id');
     $course = ['physics', 'math', 'english', 'data structure', 'A.I'];
     foreach (range(1, 30) as $index) {
         course::create(array('student_id' => $faker->randomElement($students), 'course_name' => $faker->randomElement($course), 'created_at' => $faker->dateTimeBetween('now', '+14 days')));
     }
 }
 /**
  * Store a newly created resource in storage.
  *
  * @param  \Illuminate\Http\Request  $request
  * @return \Illuminate\Http\Response
  */
 public function store(Request $request)
 {
     $input = $request->all();
     course::create($input);
     return redirect('course');
 }