fix: user notifications about packages being triggered several times

Author: florentc

src/shared/channels.py

@@ -43,9 +43,8 @@ class ContainerChannel(TriggerChannel):
 @dataclass
 class CVEDerivationClusterProposalChannel(TriggerChannel):
     model = CVEDerivationClusterProposal
-    # We don't need to lock notifications.
-    # If we are caching twice the same proposal, we will just replace it.
-    lock_notifications = False
+    # CVEDerivationClusterProposal aka suggestions, may generate notifications to users, we don't want to issue duplicated suggestions
+    lock_notifications = True
 
 
 @dataclass

src/shared/migrations/0058_remove_cvederivationclusterproposal_pgpubsub_8c7ef_and_more.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.2.24 on 2025-10-30 16:56
+
+from django.db import migrations
+import pgtrigger.compiler
+import pgtrigger.migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shared', '0057_nixderivation_shared_nixd_attribu_5fcca7_btree'),
+    ]
+
+    operations = [
+        pgtrigger.migrations.RemoveTrigger(
+            model_name='cvederivationclusterproposal',
+            name='pgpubsub_8c7ef',
+        ),
+        pgtrigger.migrations.AddTrigger(
+            model_name='cvederivationclusterproposal',
+            trigger=pgtrigger.compiler.Trigger(name='pgpubsub_8c7ef', sql=pgtrigger.compiler.UpsertTriggerSql(declare='DECLARE payload JSONB; notification_context_text TEXT;', func='\n            \n            payload := \'{"app": "shared", "model": "CVEDerivationClusterProposal"}\'::jsonb;\n            payload := jsonb_insert(payload, \'{old}\', COALESCE(to_jsonb(OLD), \'null\'));\n            payload := jsonb_insert(payload, \'{new}\', COALESCE(to_jsonb(NEW), \'null\'));\n            SELECT current_setting(\'pgpubsub.notification_context\', True) INTO notification_context_text;\n            IF COALESCE(notification_context_text, \'\') = \'\' THEN\n                notification_context_text := \'{}\';\n            END IF;\n            payload := jsonb_insert(payload, \'{context}\', notification_context_text::jsonb);\n        \n            \n            INSERT INTO pgpubsub_notification (channel, payload)\n            VALUES (\'pgpubsub_8c7ef\', payload);\n        \n            perform pg_notify(\'pgpubsub_8c7ef\', payload::text);\n            RETURN NEW;\n        ', hash='f992274d71c90db51227a6220854697b1f77b60e', operation='INSERT', pgid='pgtrigger_pgpubsub_8c7ef_29d5d', table='shared_cvederivationclusterproposal', when='AFTER')),
+        ),
+    ]