backend/models/user.py

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

class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    email = Column(String, unique=True, index=True, nullable=False)
    password = Column(String, nullable=False)
    created_at = Column(DateTime(timezone=True), server_default=func.now())
    last_login = Column(DateTime(timezone=True), nullable=True)
    preferences = Column(JSON, default={})
    
    # Relationships
    conversations = relationship("Conversation", backref="user", cascade="all, delete-orphan")