1 files changed, 4 insertions, 0 deletions
diff --git a/db.py b/db.py
index 678225e..80a8c95 100644
--- a/db.py
+++ b/db.py
@@ -22,6 +22,10 @@ from django.db.models.sql.query import Query
 from django.db.models.sql.where import WhereNode
 
 
+class ExtractWeek(Extract):
+    lookup_name = "week"
+
+
 class GroupedCompiler(SQLCompiler):
     def get_group_by(self, select, order_by):
         result = super(GroupedCompiler, self).get_group_by(select, order_by)