app/models/subtask.py

from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey
from sqlalchemy.orm import relationship
from sqlalchemy.sql import func
from ..core.database import Base

class Subtask(Base):
    __tablename__ = "subtasks"
    
    id = Column(Integer, primary_key=True, index=True)
    todo_id = Column(Integer, ForeignKey("todos.id"), nullable=False)
    title = Column(String(255), nullable=False)
    description = Column(Text, nullable=True)
    completed = Column(Boolean, default=False, nullable=False)
    order_index = Column(Integer, default=0)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    
    # Relationships
    todo = relationship("Todo", back_populates="subtasks")

class Translation(Base):
    __tablename__ = "translations"
    
    id = Column(Integer, primary_key=True, index=True)
    todo_id = Column(Integer, ForeignKey("todos.id"), nullable=False)
    language = Column(String(50), nullable=False)
    translated_title = Column(String(500), nullable=False)
    translated_description = Column(Text, nullable=True)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    
    # Relationships
    todo = relationship("Todo", back_populates="translations")