1 files changed, 4 insertions, 1 deletions
diff --git a/models.py b/models.py
index 64fb675..26bb63d 100644
--- a/models.py
+++ b/models.py
@@ -4,6 +4,8 @@ from django.db.models.expressions import RawSQL
 from django.db.models.functions import Extract, ExtractYear
 from django.utils.text import slugify
 
+from .db import GroupedManager
+
 import hashlib
 import os
 
@@ -111,7 +113,7 @@ class Room(models.Model):
         verbose_name_plural = "salles"
 
 
-class CourseManager(models.Manager):
+class CourseManager(GroupedManager):
     def __get_weeks(self, qs):
         extractYear = ExtractYear("begin")
 
@@ -130,6 +132,7 @@ class CourseManager(models.Manager):
         qs = self.get_courses_for_group(group, **filters)
         return self.__get_weeks(qs)
 
+
 class Course(models.Model):
     objects = CourseManager()