Notes convert course_id to course_key

lms/djangoapps/notes/views.py

@@ -11,11 +11,13 @@ from xmodule.annotator_token import retrieve_token
 def notes(request, course_id):
     ''' Displays the student's notes. '''
 
-    course = get_course_with_access(request.user, 'load', course_id)
+    course_key = SlashSeparatedCourseKey.from_deprecated_string(course_id)
+
+    course = get_course_with_access(request.user, 'load', course_key)
     if not notes_enabled_for_course(course):
         raise Http404
 
-    notes = Note.objects.filter(course_id=course_id, user=request.user).order_by('-created', 'uri')
+    notes = Note.objects.filter(course_id=course_key, user=request.user).order_by('-created', 'uri')
 
     student = request.user
     storage = course.annotation_storage_url