from sqlalchemy import Column, DateTime, Integer
from sqlalchemy.sql import func

from app.db.base import Base


class BaseModel(Base):
    """
    Base model class that includes common columns for all models.
    """
    __abstract__ = True

    id = Column(Integer, primary_key=True, index=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    updated_at = Column(
        DateTime(timezone=True),
        server_default=func.now(),
        onupdate=func.now()
    )