v0.6.1 Pre-release thread

[masenf]

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

pip install 'reflex~=0.6.1a'

Schedule

2024-09-28 09:40 PDT: 0.6.1a1 pre-release published for testing
2024-09-30 17:30 PDT: Public release of 0.6.1

Release Notes

Regression Fixes

• re add removed method with better behaviour and tests by @Lendemor in re add removed method with better behaviour and tests #3986
• hash the state file name by @adhami3310 in hash the state file name #4000
• EventFnArgMismatch fix to support defaults args by @LeoGrosjean in EventFnArgMismatch fix to support defaults args #4004
• serialize default value for disk state manager by @adhami3310 in serialize default value for disk state manager #4008
• remove format_state and override behavior for bare by @adhami3310 in remove format_state and override behavior for bare #3979
• Handle bool cast for optional NumberVar by @masenf in Handle bool cast for optional NumberVar #4010
• use literal var instead of serialize for toast props by @adhami3310 in use literal var instead of serialize for toast props #4027

New Features

Experimental Dynamic Components

In this release, state vars can be of rx.Component type and @rx.var computed vars can return rx.Component, allowing dynamic component structures to be created on the backend at runtime. This enables the full use of python expressions in generated components, as opposed to rx.cond and rx.foreach.

There are performance implications when using dynamic components so prefer static components where possible.

• Component as Var type by @masenf in Component as Var type #3732
• add basic integration test for dynamic components by @adhami3310 in add basic integration test for dynamic components #3990
• use bundled radix ui for dynamic components by @adhami3310 in use bundled radix ui for dynamic components #3993
• implement _evaluate in state by @adhami3310 in implement _evaluate in state #4018

Run Backend with Granian server

install granian package and set REFLEX_USE_GRANIAN=1 to run with the new, experimental granian backend (instead of the default uvicorn).

• can run with granian by setting REFLEX_USE_GRANIAN var by @Lendemor in can run with granian by setting REFLEX_USE_GRANIAN var #3919
• change loglevel and fix granian on linux by @adhami3310 in change loglevel and fix granian on linux #4012

USE_SYSTEM_NODE and USE_SYSTEM_BUN

If you prefer to run your own versions of node and bun, ensure they are on the PATH and set these environment variables to 1.

• add env var to enable using system node and bun by @Lendemor in add env var to enable using system node and bun #4006

Improvements

Bump nextjs to 14.2.13

• bump nextjs version by @Lendemor in bump nextjs version #3992

Miscellaneous

• [ENG-3717] [flexgen] Initialize app from refactored code by @masenf in [ENG-3717] [flexgen] Initialize app from refactored code #3918
• Added fill color for progress by @wassafshahzad in Added fill color for progress #3926
• Use tailwind typography plugin by default by @minimav in Use tailwind typography plugin by default #3593
  • disable prose by default for rx.html by @adhami3310 in disable prose by default for rx.html #4001
  • use class_name="prose" to enable default formatting for rx.html
• allow link as metatags by @Lendemor in allow link as metatags #3980
• allow classname to be state vars by @adhami3310 in allow classname to be state vars #3991
• default on_submit in form set to prevent_default by @Lendemor in default on_submit in form set to prevent_default #4005

Bug Fixes

• [ENG-3824]Make AI template use light mode by @ElijahAhianyo in [ENG-3824]Make AI template use light mode #3963
• don't camel case keys of dicts in style by @adhami3310 in don't camel case keys of dicts in style #3982
• add missing message when running in backend_only by @Lendemor in add missing message when running in backend_only #4002
• [ENG-3849] Track backend-only vars that are declared without a default value by @masenf in [ENG-3849] Track backend-only vars that are declared without a default value #4016
• improve lifespan typecheck and debug by @Lendemor in improve lifespan typecheck and debug #4014

Documentation

• fix: Adding in-line comments for the segmented control: value and on_change by @elviskahoro in fix: Adding in-line comments for the segmented control: value and on_change #3933
• fix: Adding code comments for segmented control type by @elviskahoro in fix: Adding code comments for segmented control type #3935

Other Changes

• add some unit tests for coverage by @Lendemor in add some unit tests for coverage #3947
• always print passed_type by @adhami3310 in always print passed_type #3950
• remove unused badge by @Lendemor in remove unused badge #3955
• add some more tests by @Lendemor in add some more tests #3965
• use svg elements instead of raw html for logo by @Lendemor in use svg elements instead of raw html for logo #3978
• bump to 0.6.1 for further dev by @masenf in bump to 0.6.1 for further dev #3995
• reorganize all tests in a single top folder by @Lendemor in reorganize all tests in a single top folder #3981
• Update markdown component map to use new rx.code_block.theme enum by @masenf in Update markdown component map to use new rx.code_block.theme enum #3996
• remove all runtime asserts by @Lendemor in remove all runtime asserts #4019

New Contributors

• @minimav made their first contribution in Use tailwind typography plugin by default #3593
• @LeoGrosjean made their first contribution in EventFnArgMismatch fix to support defaults args #4004

Full Changelog: v0.6.0...reflex-0.6.1

[bertbarabas]

My app mostly works on 0.6.1a but I did get the following exception printed in the terminal while uploading a 500MB file. It did not seem to cause my app to fail, just the exception was printed:

[ERROR] Application callable raised an exception
Traceback (most recent call last):
File ".venv/lib/python3.12/site-packages/granian/_futures.py", line 4, in future_watcher
await inner(watcher.scope, watcher.proto)
File ".venv/lib/python3.12/site-packages/fastapi/applications.py", line 1054, in call
await super().call(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/applications.py", line 113, in call
await self.middleware_stack(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/middleware/errors.py", line 165, in call
await self.app(scope, receive, _send)
File ".venv/lib/python3.12/site-packages/starlette/middleware/cors.py", line 93, in call
await self.simple_response(scope, receive, send, request_headers=headers)
File ".venv/lib/python3.12/site-packages/starlette/middleware/cors.py", line 144, in simple_response
await self.app(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/middleware/exceptions.py", line 62, in call
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 51, in wrapped_app
await app(scope, receive, sender)
File ".venv/lib/python3.12/site-packages/starlette/routing.py", line 715, in call
await self.middleware_stack(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/routing.py", line 735, in app
await route.handle(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/routing.py", line 288, in handle
await self.app(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/routing.py", line 76, in app
await wrap_app_handling_exceptions(app, request)(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/_exception_handler.py", line 51, in wrapped_app
await app(scope, receive, sender)
File ".venv/lib/python3.12/site-packages/starlette/routing.py", line 74, in app
await response(scope, receive, send)
File ".venv/lib/python3.12/site-packages/starlette/responses.py", line 250, in call
async with anyio.create_task_group() as task_group:
^^^^^^^^^^^^^^^^^^^^^^^^^
File ".venv/lib/python3.12/site-packages/anyio/_backends/_asyncio.py", line 740, in aexit
raise exc_val
File ".venv/lib/python3.12/site-packages/starlette/responses.py", line 257, in call
await wrap(partial(self.listen_for_disconnect, receive))
File ".venv/lib/python3.12/site-packages/starlette/responses.py", line 253, in wrap
await func()
File ".venv/lib/python3.12/site-packages/starlette/responses.py", line 230, in listen_for_disconnect
message = await receive()
^^^^^^^^^^^^^^^
CancelledError: Future cancelled.

[bertbarabas]

The exception only happened (so far) if I launch with:
REFLEX_USE_GRANIAN=1 reflex run

It did not happen with
REFLEX_USE_GRANIAN=0 reflex run

[masenf]

filed as #4032

[masenf]

v0.6.1 is released