continue working on case collections

generic/models.py

@@ -6,6 +6,7 @@ from django.contrib.auth.mixins import LoginRequiredMixin
 from django.db import models
 from django.http import Http404, HttpRequest
 from django.utils import timezone
+from django.core.validators import MaxValueValidator, MinValueValidator
 from smtplib import SMTPException
 
 from django.urls import reverse
@@ -1315,3 +1316,4 @@ def create_user_profile(sender, instance, created, **kwargs):
 @receiver(post_save, sender=User)
 def save_user_profile(sender, instance, **kwargs):
     instance.userprofile.save()
+