首次提交by MimoCode

backend/app/models/category.py

@@ -0,0 +1,22 @@
+from sqlalchemy import Column, Integer, String, ForeignKey, DateTime
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+from app.database import Base
+
+
+class Category(Base):
+    __tablename__ = "categories"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(100), nullable=False)
+    parent_id = Column(Integer, ForeignKey("categories.id"))
+    level = Column(Integer, nullable=False, default=1)
+    icon = Column(String(50))
+    sort_order = Column(Integer, default=0)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    parent = relationship("Category", remote_side=[id])
+    children = relationship("Category", back_populates="parent")
+    medicines = relationship("Medicine", back_populates="category")