优化数据表结构

models/policy.py

@@ -2,28 +2,59 @@
 from typing import Optional, List, TYPE_CHECKING
 from sqlmodel import Field, Relationship, text
 from .base import TableBase
+from enum import StrEnum
 
 if TYPE_CHECKING:
     from .file import File
     from .folder import Folder
 
+class PolicyType(StrEnum):
+    LOCAL = "local"
+    S3 = "s3"
+
 class Policy(TableBase, table=True):
     """存储策略模型"""
 
-    name: str = Field(max_length=255, unique=True, description="策略名称")
-    type: str = Field(max_length=255, description="存储类型 (e.g. 'local', 's3')")
-    server: str | None = Field(default=None, max_length=255, description="服务器地址（本地策略为路径）")
-    bucket_name: str | None = Field(default=None, max_length=255, description="存储桶名称")
-    is_private: bool = Field(default=True, sa_column_kwargs={"server_default": text("true")}, description="是否为私有空间")
-    base_url: str | None = Field(default=None, max_length=255, description="访问文件的基础URL")
-    access_key: str | None = Field(default=None, description="Access Key")
-    secret_key: str | None = Field(default=None, description="Secret Key")
-    max_size: int = Field(default=0, sa_column_kwargs={"server_default": "0"}, description="允许上传的最大文件尺寸（字节）")
-    auto_rename: bool = Field(default=False, sa_column_kwargs={"server_default": text("false")}, description="是否自动重命名")
-    dir_name_rule: str | None = Field(default=None, max_length=255, description="目录命名规则")
-    file_name_rule: str | None = Field(default=None, max_length=255, description="文件命名规则")
-    is_origin_link_enable: bool = Field(default=False, sa_column_kwargs={"server_default": text("false")}, description="是否开启源链接访问")
-    options: str | None = Field(default=None, description="其他选项 (JSON格式)")
+    name: str = Field(max_length=255, unique=True)
+    """策略名称"""
+
+    type: PolicyType
+    """存储策略类型"""
+
+    server: str | None = Field(default=None, max_length=255)
+    """服务器地址（本地策略为绝对路径）"""
+
+    bucket_name: str | None = Field(default=None, max_length=255)
+    """存储桶名称"""
+
+    is_private: bool = Field(default=True, sa_column_kwargs={"server_default": text("true")})
+    """是否为私有空间"""
+
+    base_url: str | None = Field(default=None, max_length=255)
+    """访问文件的基础URL"""
+
+    access_key: str | None = Field(default=None)
+    """Access Key"""
+
+    secret_key: str | None = Field(default=None)
+    """Secret Key"""
+    max_size: int = Field(default=0, sa_column_kwargs={"server_default": "0"})
+    """允许上传的最大文件尺寸（字节）"""
+
+    auto_rename: bool = Field(default=False, sa_column_kwargs={"server_default": text("false")})
+    """是否自动重命名"""
+
+    dir_name_rule: str | None = Field(default=None, max_length=255)
+    """目录命名规则"""
+
+    file_name_rule: str | None = Field(default=None, max_length=255)
+    """文件命名规则"""
+
+    is_origin_link_enable: bool = Field(default=False, sa_column_kwargs={"server_default": text("false")})
+    """是否开启源链接访问"""
+    
+    options: str | None = Field(default=None)
+    """其他选项 (JSON格式)"""
     # options 示例: {"token":"","file_type":null,"mimetype":"","od_redirect":"http://127.0.0.1:8000/...","chunk_size":52428800,"s3_path_style":false}
     
     # 关系