from sqlalchemy import Column, String, DateTime, ForeignKey, Text 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, index=True) receiver_id = Column(String, ForeignKey("users.id"), nullable=False, index=True) content = Column(Text, 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") receiver = relationship("User", foreign_keys=[receiver_id], back_populates="received_messages")