数据库时间日志迁移至 BaseModel

models/base.py

@@ -1,7 +1,27 @@
 from typing import Optional
 from sqlmodel import SQLModel, Field
+from sqlalchemy import DateTime
+from datetime import datetime, timezone
+from sqlalchemy.ext.asyncio import AsyncAttrs
 
-class BaseModel(SQLModel):
+utcnow = lambda: datetime.now(tz=timezone.utc)
+
+class BaseModel(SQLModel, AsyncAttrs):
     __abstract__ = True
     
-    id: Optional[int] = Field(default=None, primary_key=True, description="主键ID")
+    id: Optional[int] = Field(default=None, primary_key=True, description="主键ID")
+    created_at: datetime = Field(
+        default_factory=utcnow,
+        description="创建时间",
+        )
+    updated_at: datetime = Field(
+        sa_type=DateTime,
+        description="更新时间",
+        sa_column_kwargs={"default": utcnow, "onupdate": utcnow},
+        default_factory=utcnow
+    )
+    deleted_at: Optional[datetime] = Field(
+        default=None, 
+        description="删除时间",
+        sa_column={"nullable": True}
+    )