首次提交by MimoCode

backend/app/models/audit_log.py

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+from sqlalchemy import Column, Integer, String, Text, ForeignKey, DateTime
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+from app.database import Base
+
+
+class AuditLog(Base):
+    __tablename__ = "audit_logs"
+
+    id = Column(Integer, primary_key=True, index=True)
+    medicine_id = Column(Integer, ForeignKey("medicines.id"), nullable=False, index=True)
+    batch_id = Column(Integer, ForeignKey("batches.id"))
+    user_id = Column(Integer, ForeignKey("users.id"))
+    action = Column(String(50), nullable=False)
+    quantity_change = Column(Integer, nullable=False)
+    quantity_after = Column(Integer, nullable=False)
+    remark = Column(Text)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    medicine = relationship("Medicine", back_populates="audit_logs")
+    batch = relationship("Batch", back_populates="audit_logs")
+    user = relationship("User", back_populates="audit_logs")