使用官方提供的 bump-pydantic 工具 来自动化部分迁移pydantic代码

初始化Kotti_next 数据库报错kotti-next db init，于是进行pytest测试，发现很多warning信息，与pydantic代码相关。

这些怎么解决？kotti_next\schemas\auth.py:42
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\schemas\auth.py:42: PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.12/migration/
    class UserResponse(BaseModel):

kotti_next\schemas\node.py:35
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\schemas\node.py:35: PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.12/migration/
    class NodeResponse(BaseModel):

kotti_next\routers\webhooks.py:42
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\routers\webhooks.py:42: PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.12/migration/
    class WebhookResponse(BaseModel):

kotti_next\routers\webhooks.py:58
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\routers\webhooks.py:58: PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.12/migration/
    class WebhookDeliveryResponse(BaseModel):

kotti_next\schemas\media.py:11
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\schemas\media.py:11: PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.12/migration/
    class MediaFileResponse(BaseModel):

kotti_next\schemas\public.py:11
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\schemas\public.py:11: PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.12/migration/
    class PublicNodeBase(BaseModel):

kotti_next\schemas\public.py:36
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\schemas\public.py:36: PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.12/migration/
    class PublicTreeNode(BaseModel):

tests/test_acl.py: 68 warnings
tests/test_auth.py: 9 warnings
tests/test_media.py: 11 warnings
tests/test_nodes.py: 170 warnings
tests/test_public_api.py: 41 warnings
tests/test_users.py: 23 warnings
tests/test_webhooks.py: 25 warnings
  G:\workbuddy\.venv\Lib\site-packages\sqlalchemy\sql\schema.py:3624: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
    return util.wrap_callable(lambda ctx: fn(), fn)  # type: ignore

tests/test_acl.py: 7 warnings
tests/test_auth.py: 8 warnings
tests/test_media.py: 7 warnings
tests/test_nodes.py: 10 warnings
tests/test_public_api.py: 8 warnings
tests/test_users.py: 16 warnings
tests/test_webhooks.py: 10 warnings
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\routers\auth.py:58: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
    user.last_login = datetime.utcnow()

tests/test_acl.py: 7 warnings
tests/test_auth.py: 10 warnings
tests/test_media.py: 7 warnings
tests/test_nodes.py: 10 warnings
tests/test_public_api.py: 8 warnings
tests/test_users.py: 16 warnings
tests/test_webhooks.py: 10 warnings
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\auth\jwt.py:32: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
    now = datetime.utcnow()

tests/test_acl.py: 7 warnings
tests/test_auth.py: 9 warnings
tests/test_media.py: 7 warnings
tests/test_nodes.py: 10 warnings
tests/test_public_api.py: 8 warnings
tests/test_users.py: 16 warnings
tests/test_webhooks.py: 10 warnings
  c:\Users\Admin\WorkBuddy\20260330150804\backend\kotti_next\auth\jwt.py:55: DeprecationWarning: datetime.datetime.utcnow() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.now(datetime.UTC).
    now = datetime.utcnow()

tests/test_acl.py: 10 warnings
tests/test_auth.py: 7 warnings
tests/test_media.py: 10 warnings

AI说：

要解决 kotti_next 代码中的 PydanticDeprecatedSince20 警告和 datetime.utcnow() 的 DeprecationWarning，需要分别处理 Pydantic V2 的迁移和 UTC 时间的正确使用方式。

1. 解决 PydanticDeprecatedSince20 警告

警告信息如 Support for class-based config is deprecated, use ConfigDict instead 表明项目中使用了 Pydantic V1 风格的配置方式。根据 Pydantic V2 的迁移指南，你需要将旧的 Config 类替换为 model_config 字典配置方式。

2.解决 datetime.utcnow() DeprecationWarning

警告信息如 datetime.datetime.utcnow() is deprecated 表明项目中仍在使用被弃用的 utcnow() 方法。根据 Python 官方建议，应使用 datetime.now(datetime.UTC) 或 datetime.now(timezone.utc) 来替代。

‌具体修改步骤‌：

• ‌**替换 utcnow() 为 now(timezone.utc)**‌：

  # 旧代码
  from datetime import datetime
  now = datetime.utcnow()
  
  # 新代码
  from datetime import datetime, timezone
  now = datetime.now(timezone.utc)

• ‌**如果使用 Python 3.11+，可使用 datetime.UTC**‌：

  # Python 3.11+
  from datetime import datetime, UTC
  now = datetime.now(UTC)

• ‌在 sqlalchemy/schema.py:3624 中修改 ‌：

  找到该文件中使用 datetime.utcnow() 的地方，将其替换为 datetime.now(timezone.utc) 或 datetime.now(UTC)

重点解决pydantic的问题

方法步骤如下：

pip install bump-pydantic
cd /path/to/your/project
bump-pydantic your_package

对我的项目来说，路径在c:\Users\Admin\WorkBuddy\20260330150804>

执行命令为：

cd c:\Users\Admin\WorkBuddy\20260330150804
bump-pydantic backend

执行结果：

c:\Users\Admin\WorkBuddy\20260330150804>bump-pydantic backend
[22:20:57] Start bump-pydantic.                                                                              main.py:61
           Found 67 files to process.                                                                        main.py:78
[22:21:41] Refactored 5 files.                                                                              main.py:144
           Run successfully!                                                                                main.py:154

再执行测试，pydantic 的报错就没有了。

解决完之后，又让AI帮着解决了数据库初始化问题，现在数据库初始化ok

(.venv) c:\Users\Admin\WorkBuddy\20260330150804\backend>kotti-next db init
→ Creating database tables...
  Admin user already exists, skipping
✓ Initialisation complete