from sqlalchemy import Column, String, DateTime, ForeignKey from sqlalchemy.orm import relationship from sqlalchemy.sql import func from core.database import Base import uuid class Message(Base): __tablename__ = "messages" id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4())) sender_id = Column(String, ForeignKey("users.id"), nullable=False) recipient_id = Column(String, ForeignKey("users.id"), nullable=False) content = Column(String, nullable=False) is_read = Column(Boolean, default=False) created_at = Column(DateTime, default=func.now()) updated_at = Column(DateTime, default=func.now(), onupdate=func.now()) sender = relationship("User", foreign_keys=[sender_id], back_populates="sent_messages") recipient = relationship("User", foreign_keys=[recipient_id], back_populates="received_messages")