Enhance task numbers, enable late submissions with badges, and fix overdue badges

lmsege/lms/models.py

@@ -52,7 +52,8 @@ class Question(models.Model):
         ordering = ['order', 'id']
 
     def __str__(self):
-        return f"Задача {self.id} к {self.assignment.title}"
+        number = self.order if self.order else self.id
+        return f"Задача {number} к {self.assignment.title}"
 
 class Submission(models.Model):
     STATUS_CHOICES = (
@@ -68,6 +69,7 @@ class Submission(models.Model):
     started_at = models.DateTimeField('Время начала', blank=True, null=True)
     submitted_at = models.DateTimeField('Дата отправки', auto_now_add=True)
     is_time_expired = models.BooleanField('Время вышло', default=False)
+    is_late = models.BooleanField('Сдано после дедлайна', default=False)
 
     class Meta:
         verbose_name = 'Ответ ученика'