public function store_lesson(Request $request)
{
$lesson = Lesson::findOrNew($request->id);
$lesson->course_id = $request->course_id;
$lesson->name = $request->name;
$lesson->detail_content = $request->detail_content;
$lesson->detail_teacher = $request->detail_teacher;
$lesson->description = $request->description;
$lesson->detail = $request->detail;
$lesson->order = $request->order;
$lesson->save();
return redirect('manage/editcourse/' . $request->course_id);
}
