src/app/models/base.py

"""
Base Model with Common Fields
"""
from datetime import datetime
from sqlalchemy import Column, DateTime
from sqlalchemy.dialects.postgresql import UUID
import uuid
from app.core.database import Base


class BaseModel(Base):
    """
    Base model with common fields for all tables
    """
    __abstract__ = True

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    created_at = Column(DateTime, default=datetime.utcnow, nullable=False)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
    deleted_at = Column(DateTime, nullable=True)  # Soft delete

    def soft_delete(self):
        """Soft delete the record"""
        self.deleted_at = datetime.utcnow()

    @property
    def is_deleted(self) -> bool:
        """Check if record is soft deleted"""
        return self.deleted_at is not None
    
    @classmethod
    def active_only(cls, query):
        """Filter query to only include non-deleted records"""
        return query.filter(cls.deleted_at == None)
    
    @classmethod
    def with_deleted(cls, query):
        """Return query including deleted records (no filter)"""
        return query