temp commit

build/lib/app/db/base.py

@@ -0,0 +1,27 @@
+from datetime import datetime, timezone
+
+from sqlalchemy import MetaData, event
+from sqlalchemy.orm import DeclarativeBase
+
+
+NAMING_CONVENTION = {
+    "ix": "ix_%(column_0_label)s",
+    "uq": "uq_%(table_name)s_%(column_0_name)s",
+    "ck": "ck_%(table_name)s_%(constraint_name)s",
+    "fk": "fk_%(table_name)s_%(column_0_name)s_%(referred_table_name)s",
+    "pk": "pk_%(table_name)s",
+}
+
+
+class Base(DeclarativeBase):
+    metadata = MetaData(naming_convention=NAMING_CONVENTION)
+
+
+@event.listens_for(Base, "before_update", propagate=True)
+def _set_updated_at_before_update(_mapper, _connection, target) -> None:
+    # Keep audit timestamps current for ORM-managed updates.
+    if hasattr(target, "updated_at"):
+        target.updated_at = datetime.now(timezone.utc)
+
+
+metadata = Base.metadata