upload

backend/app/models/base.py

@@ -0,0 +1,21 @@
+from datetime import datetime
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column
+from sqlalchemy import DateTime, func
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+class TimestampMixin:
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        nullable=False,
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        onupdate=func.now(),
+        nullable=False,
+    )