Fix current_live_lesson & previous_live_lesson in SchoolSchedule

apps/school/models.py

@@ -50,7 +50,7 @@ class SchoolSchedule(models.Model):
         now_time = now()
         live_lesson = LiveLesson.objects.filter(
             date__week_day=self.weekday % 7 + 1,
-            date__week=now_time.date().isocalendar()[1],
+            date__range=[now_time.date(), (now_time + timedelta(days=7)).date()],
             deactivated_at__isnull=True,
         ).first()
         return live_lesson
@@ -59,7 +59,7 @@ class SchoolSchedule(models.Model):
         now_time = now()
         live_lesson = LiveLesson.objects.filter(
             date__week_day=self.weekday % 7 + 1,
-            date__week=(now_time.date() - timedelta(weeks=1)).isocalendar()[1],
+            date__range=[(now_time - timedelta(days=7)).date(), now_time.date()],
             deactivated_at__isnull=True,
         ).first()
         return live_lesson