Scaffold V2 backend foundation

ai_knowledge_base_v2/apps/backend/app/models/user.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from datetime import datetime
+
+from sqlalchemy import BigInteger, DateTime, Integer, String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.models.base import Base, SoftDeleteMixin, TimestampMixin
+
+
+class User(Base, TimestampMixin, SoftDeleteMixin):
+    __tablename__ = "sys_user"
+
+    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
+    phone: Mapped[str] = mapped_column(String(20), unique=True, index=True, nullable=False)
+    name: Mapped[str] = mapped_column(String(50), nullable=False)
+    nickname: Mapped[str | None] = mapped_column(String(50), nullable=True)
+    status: Mapped[int] = mapped_column(default=1, nullable=False)
+    daily_chat_limit: Mapped[int] = mapped_column(Integer, default=100, nullable=False)
+    daily_chat_used: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+    effective_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    expired_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    last_login_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+
+    knowledge_permissions: Mapped[list["UserKnowledgePermission"]] = relationship(
+        "UserKnowledgePermission", back_populates="user"
+    )
+    chat_sessions: Mapped[list["ChatSession"]] = relationship("ChatSession", back_populates="user")