1.7

backend/app/models/miss_echo.py

@@ -0,0 +1,24 @@
+"""念念回音模型"""
+
+from datetime import datetime
+
+from sqlalchemy import String, Boolean, DateTime, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+class MissEcho(Base):
+    __tablename__ = "miss_echoes"
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True)
+    from_user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"))
+    to_user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"))
+    leaf_seed: Mapped[str] = mapped_column(String(32), nullable=False)  # 程序化叶子种子
+    message: Mapped[str | None] = mapped_column(String(50), nullable=True)  # 可选附言
+    delivered_online: Mapped[bool] = mapped_column(Boolean, default=False)  # 是否在线送达
+    read_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.utcnow())
+
+    from_user = relationship("User", foreign_keys=[from_user_id])
+    to_user = relationship("User", foreign_keys=[to_user_id])