修改路径，从src放到根目录

database/base.py

@@ -0,0 +1,66 @@
+"""
+数据库模型基类
+"""
+
+from datetime import datetime
+from typing import Any, Dict
+from sqlalchemy import Column, DateTime, Integer
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.sql import func
+
+Base = declarative_base()
+
+
+class BaseModel(Base):
+    """抽象基类，为所有模型提供通用字段"""
+    __abstract__ = True
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    created_time = Column(DateTime(timezone=True),
+                          server_default=func.now(),
+                          nullable=False,
+                          comment="创建时间")
+
+    def to_dict(self, exclude: list = None) -> Dict[str, Any]:
+        """
+        将模型实例转换为字典
+
+        Args:
+            exclude: 要排除的字段列表
+
+        Returns:
+            包含模型字段的字典
+        """
+        exclude = exclude or []
+        result = {}
+
+        for column in self.__table__.columns:
+            if column.name in exclude:
+                continue
+
+            value = getattr(self, column.name)
+
+            # 处理特殊类型
+            if isinstance(value, datetime):
+                value = value.isoformat()
+            elif isinstance(value, bytes):
+                value = value.hex() if value else None
+
+            result[column.name] = value
+
+        return result
+
+    def update_from_dict(self, data: Dict[str, Any]) -> None:
+        """
+        从字典更新模型字段
+
+        Args:
+            data: 包含要更新字段的字典
+        """
+        for key, value in data.items():
+            if hasattr(self, key) and key != 'id':
+                setattr(self, key, value)
+
+    def __repr__(self) -> str:
+        """模型表示"""
+        return f"<{self.__class__.__name__}(id={self.id})>"