show mail attachments in frontend

core/files/models.py

@@ -77,6 +77,13 @@ class AbstractFile(models.Model):
 
     objects = FileManager()
 
+    def save(self, *args, **kwargs):
+        from django.utils import timezone
+        if not self.created_at:
+            self.created_at = timezone.now()
+        self.updated_at = timezone.now()
+        super().save(*args, **kwargs)
+
     class Meta:
         abstract = True