33 lines
1.3 KiB
Python
33 lines
1.3 KiB
Python
"""会话成员模型"""
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from datetime import datetime, timezone
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from sqlalchemy import String, DateTime, ForeignKey, UniqueConstraint
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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 ConversationMember(Base):
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__tablename__ = "conversation_members"
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__table_args__ = (
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UniqueConstraint("conversation_id", "user_id", name="uq_conv_user"),
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)
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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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user_id: Mapped[str] = mapped_column(
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String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False
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)
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role: Mapped[str] = mapped_column(String(20), default="member") # owner / admin / member
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nickname: Mapped[str | None] = mapped_column(String(50), nullable=True) # 群内昵称
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last_read_message_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
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joined_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.utcnow())
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left_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
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# 关系
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conversation = relationship("Conversation", back_populates="members")
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user = relationship("User", back_populates="conversations")
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