首个可运行的版本

2026-06-12 23:14:12 +08:00
commit b3d90c65f8
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+"""会话成员模型"""
+
+from datetime import datetime, timezone
+
+from sqlalchemy import String, DateTime, ForeignKey, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+class ConversationMember(Base):
+    __tablename__ = "conversation_members"
+    __table_args__ = (
+        UniqueConstraint("conversation_id", "user_id", name="uq_conv_user"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True)
+    conversation_id: Mapped[str] = mapped_column(
+        String(36), ForeignKey("conversations.id", ondelete="CASCADE"), nullable=False
+    )
+    user_id: Mapped[str] = mapped_column(
+        String(36), ForeignKey("users.id", ondelete="CASCADE"), nullable=False
+    )
+    role: Mapped[str] = mapped_column(String(20), default="member")  # owner / admin / member
+    nickname: Mapped[str | None] = mapped_column(String(50), nullable=True)  # 群内昵称
+    last_read_message_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
+    joined_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.utcnow())
+    left_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+
+    # 关系
+    conversation = relationship("Conversation", back_populates="members")
+    user = relationship("User", back_populates="conversations")