v0.8.15 Pre-release thread

[adhami3310]

Please report any problems you encounter in this discussion thread or as separate issues on reflex-dev/reflex.

pip install 'reflex~=0.8.15a'

Schedule

2025-10-09 11:00 PT: 0.8.15a1 pre-release published for testing
2025-10-13: Planned Public release of 0.8.15

Release Notes

Deprecations

rx.Base is deprecated.

Now that pydantic is an optional dependency, Reflex will no longer maintain a custom wrapper over BaseModel. You have a few options for replacing your rx.Base subclasses:

• Continue to use pydantic -- minimal code/behavior changes
  • Ensure pydantic is part of your app dependency list
  • Extend from pydantic.BaseModel instead of rx.Base
• Move to dataclasses.dataclass -- use the python stdlib
• Move to typing.TypedDict -- uses a plain dict, but has extra type hints to make Var Operations work correctly

sqlmodel.SQLModel is now recommended over rx.Model.

• Change your db models to inherit from sqlmodel.SQLModel instead of rx.Model.
• Ensure the model has an explicit primary_key column. The default previously used to be:
  • id: int | None = sqlmodel.Field(default=None, primary_key=True)
• Use sqlmodel.select(MyModel) instead of MyModel.select().

Python 3.14 is now supported! Python 3.10 deprecated D:

Python 3.14 got release on 10/07 and now Reflex supports it! It gives us very considerable performance improvements just by bumping.

In theory, you can use reflex with python free threaded, although we don't officially support it just yet. If you do run into issues with it, do report it!

• python3.14 compat by @masenf in python3.14 compat #5859
• deprecate python 3.10 by @adhami3310 in deprecate python 3.10 #5868

Make pydantic, sqlmodel, and alembic optional

We will still install them by default until 0.9. You can ease into the transition by setting your reflex dependency to reflex[db]. You can uninstall them and reflex will continue to work assuming you don't use those in your app.

• move pydantic, sqlmodel, alembic to optional dependencies by @adhami3310 in move pydantic, sqlmodel, alembic to optional dependencies #5438
• only deprecate base at subclass by @adhami3310 in only deprecate base at subclass #5863
• output what class is subclassing rx.Base by @adhami3310 in output what class is subclassing rx.Base #5864

Upcast enum values to their enum type on event handlers

• Upcast str or int to annotated Enum type in event handlers by @masenf in Upcast str or int to annotated Enum type in event handlers #5855

Performance Improvements

• optimize various var functions by @adhami3310 in optimize various var functions #5865

Bugfixes

• make on load lambda work by @adhami3310 in make on load lambda work #5856

Chores

• 0815dev by @adhami3310 in 0815dev #5853
• make _no_chain_background_task take state instance by @adhami3310 in make _no_chain_background_task take state instance #5857
• split manager by @adhami3310 in split manager #5852
• Bring back accidentally removed pool params by @masenf in Bring back accidentally removed pool params #5861
• ENG-7927: make builder first option in reflex init cli by @adhami3310 in ENG-7927: make builder first option in reflex init cli #5862
• Use pytest-rerunfailures to avoid tmp_path stashkey issues by @masenf in Use pytest-rerunfailures to avoid tmp_path stashkey issues #5869
• rolldown vite 7.1.16 by @adhami3310 in rolldown vite 7.1.16 #5858

Full Changelog: v0.8.14...release/reflex-0.8.15