PB-1403: only update Item timestamp when Asset timestamp is updated.

app/stac_api/migrations/0074_remove_asset_update_item_child_trigger_and_more.py

@@ -0,0 +1,36 @@
+# Generated by Django 5.2.11 on 2026-06-03 11:46
+
+import pgtrigger.compiler
+import pgtrigger.migrations
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stac_api', '0073_remove_asset_update_asset_auto_variables_trigger_and_more'),
+    ]
+
+    operations = [
+        pgtrigger.migrations.RemoveTrigger(
+            model_name='asset',
+            name='update_item_child_trigger',
+        ),
+        pgtrigger.migrations.AddTrigger(
+            model_name='asset',
+            trigger=pgtrigger.compiler.Trigger(
+                name='update_item_child_trigger',
+                sql=pgtrigger.compiler.UpsertTriggerSql(
+                    condition='WHEN (OLD."updated" IS DISTINCT FROM (NEW."updated"))',
+                    func=
+                    "\n    -- update related item\n    UPDATE stac_api_item SET\n        updated = now(),\n        etag = public.gen_random_uuid()\n    WHERE id = NEW.item_id;\n\n    RAISE INFO 'Parent table item.id=% auto fields updated due to child Asset.id=% updates.',\n        NEW.item_id, NEW.id;\n\n    RETURN NEW;\n    ",
+                    hash='4dd699496e921d5be8c809a22a973a19bdac190e',
+                    operation='UPDATE',
+                    pgid='pgtrigger_update_item_child_trigger_15ed4',
+                    table='stac_api_asset',
+                    when='AFTER'
+                )
+            ),
+        ),
+    ]

app/stac_api/pgtriggers.py

@@ -213,7 +213,7 @@ class ItemFileSizeTrigger(pgtrigger.Trigger):
 
     return [
         *auto_variables_triggers('asset', 'file', 'checksum_multihash'),
-        *child_triggers('item', 'Asset'),
+        *child_triggers('item', 'Asset', 'updated'),
         *asset_counter_trigger('gsdcount', 'eo_gsd'),
         *asset_counter_trigger('geoadminlangcount', 'geoadmin_lang'),
         *asset_counter_trigger('geoadminvariantcount', 'geoadmin_variant'),

app/tests/tests_09/test_collection_model.py

@@ -147,7 +147,7 @@ def test_collection_update_on_asset_write_operations(self):
         # check collection's update on asset update
         initial_last_modified = self.collection.model.updated
         sleep(0.01)
-        asset.model.title = f"new-{asset.model.title}"
+        asset.model.checksum_multihash = b"new-hash"
         asset.model.full_clean()
         asset.model.save()
         self.collection.model.refresh_from_db()

app/tests/tests_10/test_collection_model.py

@@ -147,7 +147,7 @@ def test_collection_update_on_asset_write_operations(self):
         # check collection's update on asset update
         initial_last_modified = self.collection.model.updated
         sleep(0.01)
-        asset.model.title = f"new-{asset.model.title}"
+        asset.model.checksum_multihash = b"new-hash"
         asset.model.full_clean()
         asset.model.save()
         self.collection.model.refresh_from_db()

app/tests/tests_10/test_pgtriggers.py

@@ -92,6 +92,7 @@ def setUp(self):
         ('asset', 'asset', 'checksum_multihash', True),
         ('asset', 'asset', 'description', False),
         ('asset', 'item', 'checksum_multihash', True),
+        ('asset', 'item', 'title', False),
         ('item', 'collection', 'name', True),
         ('collection_asset', 'collection', 'checksum_multihash', True),
     ])