1.9

backend/app/models/message_reaction.py

@@ -0,0 +1,24 @@
+"""消息表情回应模型"""
+
+from datetime import datetime
+
+from sqlalchemy import String, DateTime, ForeignKey, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+class MessageReaction(Base):
+    __tablename__ = "message_reactions"
+    __table_args__ = (
+        UniqueConstraint("message_id", "user_id", "emoji", name="uq_msg_reaction"),
+    )
+
+    id: Mapped[str] = mapped_column(String(36), primary_key=True)
+    message_id: Mapped[str] = mapped_column(String(36), ForeignKey("messages.id", ondelete="CASCADE"))
+    user_id: Mapped[str] = mapped_column(String(36), ForeignKey("users.id", ondelete="CASCADE"))
+    emoji: Mapped[str] = mapped_column(String(10), nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=lambda: datetime.utcnow())
+
+    message = relationship("Message")
+    user = relationship("User", foreign_keys=[user_id])