Add post save to delete album cover cache

gallery/models/album.py

@@ -5,6 +5,8 @@ from django.core.cache import cache
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.db.models import Sum
+from django.db.models.signals import post_save
+from django.dispatch import receiver
 from django.templatetags.static import static
 from django.urls import reverse
 from django.utils.text import slugify
@@ -59,3 +61,8 @@ class Album(models.Model):
 
     def __str__(self):
         return '{}'.format(self.name)
+
+
+@receiver(post_save, sender=Album)
+def delete_album_cover_cache(sender, instance, **kwargs):
+    cache.delete(f'cover_image_data_{instance.pk}')