system-prompts-and-models-of-ai-tools/salesflow-saas/backend/app/models/base.py

import uuid
from datetime import datetime, timezone
from sqlalchemy import Column, DateTime, Boolean
from sqlalchemy.dialects.postgresql import UUID
from app.database import Base


class BaseModel(Base):
    __abstract__ = True

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    created_at = Column(DateTime(timezone=True), default=lambda: datetime.now(timezone.utc))


class TenantModel(BaseModel):
    __abstract__ = True

    tenant_id = Column(UUID(as_uuid=True), nullable=False, index=True)