app/models/chat.py

from sqlalchemy import Column, Integer, String, ForeignKey, DateTime, func
from sqlalchemy.orm import relationship
from app.database import Base

class ChatHistory(Base):
    __tablename__ = "chat_history"

    id = Column(Integer, primary_key=True, index=True)
    user_id = Column(Integer, ForeignKey("users.id"))
    message = Column(String)
    response = Column(String)
    timestamp = Column(DateTime, default=func.now())

    user = relationship("User")