first-update

backend/app/models/base.py

@@ -0,0 +1,19 @@
+"""
+Base Model with UUID support
+"""
+import uuid
+from datetime import datetime
+from sqlalchemy import Column, DateTime
+from sqlalchemy.dialects.postgresql import UUID
+from app.core.database import Base
+
+
+class TimestampMixin:
+    """Mixin for created_at and updated_at timestamps"""
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
+
+
+class UUIDMixin:
+    """Mixin for UUID primary key"""
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4, index=True)