show all item timestamps in timeline

core/inventory/models.py

@@ -1,6 +1,9 @@
 from itertools import groupby
 
 from django.db import models
+from django.db.models.signals import pre_save
+from django.dispatch import receiver
+from django.utils import timezone
 from django_softdelete.models import SoftDeleteModel, SoftDeleteManager
 
 
@@ -64,6 +67,11 @@ class Item(SoftDeleteModel):
         return '[' + str(self.id) + ']' + self.description
 
 
+@receiver(pre_save, sender=Item)
+def item_updated(sender, instance, **kwargs):
+    instance.updated_at = timezone.now()
+
+
 class Container(SoftDeleteModel):
     id = models.AutoField(primary_key=True)
     name = models.CharField(max_length=255)