Release v1.0.0

services/backend/hotpocket_backend/apps/saves/adapters/postgres.py

@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+from __future__ import annotations
+
+import logging
+import uuid
+
+import django.db
+from django.db import models
+
+from hotpocket_backend.apps.saves.models import Save
+from hotpocket_common.db import postgres  # noqa: F401
+from hotpocket_soa.dto.associations import AssociationsQuery
+
+from .base import AssociationAdapter, SaveAdapter
+
+LOGGER = logging.getLogger(__name__)
+
+
+class PostgresSaveAdapter(SaveAdapter):
+    ROW_LOCKED_MESSAGE = 'could not obtain lock on row in relation "saves_save"'
+
+    def get_for_processing(self, *, pk: uuid.UUID) -> Save | None:
+        try:
+            return Save.active_objects.select_for_update(nowait=True).get(pk=pk)
+        except django.db.utils.OperationalError as exception:
+            if exception.args[0].startswith(self.ROW_LOCKED_MESSAGE) is True:
+                LOGGER.info('Trying to process a locked save: pk=`%s`', pk)
+                return None
+
+            raise exception
+
+
+class PostgresAssociationAdapter(AssociationAdapter):
+    def get_search_term_filters(self, *, query: AssociationsQuery) -> list[models.Q]:
+        result = [
+            (
+                models.Q(target__url__ilike=query.search)
+                |
+                models.Q(target_title__ilike=query.search)
+                |
+                models.Q(target__title__ilike=query.search)
+                |
+                models.Q(target_description__ilike=query.search)
+                |
+                models.Q(target__description__ilike=query.search)
+            ),
+        ]
+
+        return result