update admin interface

core/inventory/serializers.py

@@ -106,6 +106,14 @@ class ItemSerializer(BasicItemSerializer):
                 'timestamp': relation.timestamp,
                 'issue_thread': BasicIssueSerializer(relation.issue_thread).data,
             })
+        for placement in (obj.container_history.all()):
+            timeline.append({
+                'type': 'placement',
+                'id': placement.id,
+                'timestamp': placement.timestamp,
+                'cid': placement.container.id,
+                'box': placement.container.name
+            })
         return sorted(timeline, key=lambda x: x['timestamp'])