access update

csv/load_courses.py

@@ -10,6 +10,9 @@ from courses.models import Course, Vertex, CourseMap
 from storage.models import Storage
 
 if __name__ == '__main__':
+    CourseMap.objects.all().delete()
+    Vertex.objects.all().delete()
+    Course.objects.all().delete()
     with open('./course/course.csv') as user_csv:
         user_reader = csv.DictReader(user_csv)
         for row in user_reader: