全局审计日fix: 使用鸭子类型强制安全解包 SQLAlchemy Row 对象，彻底解决 to_dict 报错志

inventory-backend/app/models/base.py

@@ -47,6 +47,9 @@ class MaterialBase(db.Model):
     # 4. 关联服务库存 (StockService)
     stock_services = db.relationship('StockService', back_populates='base', lazy='dynamic')
 
+    # 5. 关联预警设置 (MaterialWarningSetting)
+    warning_settings = db.relationship('MaterialWarningSetting', back_populates='material', lazy='dynamic', cascade='all, delete-orphan')
+
     def to_dict(self):
         """
         序列化方法
@@ -78,4 +81,30 @@ class MaterialBase(db.Model):
             'generalImage': parse_list(self.product_image),
             # 【核心修改】：直接返回布尔值，不再转成 1 或 0
             'isEnabled': bool(self.is_enabled),
+        }
+
+
+class MaterialWarningSetting(db.Model):
+    """
+    物料预警设置表模型
+    对应数据库表: material_warning_settings
+    """
+    __tablename__ = 'material_warning_settings'
+
+    id = db.Column(db.Integer, primary_key=True)
+    base_id = db.Column(db.Integer, db.ForeignKey('material_base.id'), nullable=False, comment='物料基础信息ID')
+    is_enabled = db.Column(db.Boolean, default=False, comment='是否启用预警')
+    yellow_threshold = db.Column(db.Numeric(10, 2), nullable=True, comment='黄色预警阈值')
+    red_threshold = db.Column(db.Numeric(10, 2), nullable=True, comment='红色预警阈值')
+
+    # 关联关系
+    material = db.relationship('MaterialBase', back_populates='warning_settings')
+
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'baseId': self.base_id,
+            'isEnabled': bool(self.is_enabled),
+            'yellowThreshold': float(self.yellow_threshold) if self.yellow_threshold is not None else None,
+            'redThreshold': float(self.red_threshold) if self.red_threshold is not None else None
         }