初始化鸿蒙应用展示平台项目 - 前后端分离架构

backend/app/models/app_metrics.py

@@ -0,0 +1,15 @@
+from sqlalchemy import Column, String, Integer, BigInteger, DateTime, DECIMAL, ForeignKey
+from sqlalchemy.sql import func
+from app.database import Base
+
+class AppMetrics(Base):
+    __tablename__ = "app_metrics"
+    
+    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    app_id = Column(String(50), ForeignKey("app_info.app_id", ondelete="CASCADE"), nullable=False, index=True)
+    pkg_name = Column(String(255), ForeignKey("app_info.pkg_name", ondelete="CASCADE"), nullable=False, index=True)
+    version = Column(String(50), nullable=False)
+    size_bytes = Column(BigInteger, nullable=False)
+    download_count = Column(BigInteger, nullable=False, index=True)
+    release_date = Column(BigInteger, nullable=False)
+    created_at = Column(DateTime, nullable=False, server_default=func.now(), index=True)