26 lines
970 B
Python
26 lines
970 B
Python
"""群公告模型"""
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from datetime import datetime
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from sqlalchemy import String, DateTime, ForeignKey
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from sqlalchemy.orm import Mapped, mapped_column, relationship
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from app.database import Base
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class GroupAnnouncement(Base):
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__tablename__ = "group_announcements"
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id: Mapped[str] = mapped_column(String(36), primary_key=True)
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conversation_id: Mapped[str] = mapped_column(
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String(36), ForeignKey("conversations.id", ondelete="CASCADE"), nullable=False
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)
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author_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="SET NULL"), nullable=True)
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content: Mapped[str] = mapped_column(String(1000), nullable=False)
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created_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.utcnow())
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updated_at: Mapped[datetime] = mapped_column(
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DateTime, default=lambda: datetime.utcnow(), onupdate=lambda: datetime.utcnow()
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)
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author = relationship("User", foreign_keys=[author_id])
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