v0.6.0 Pre-release thread

[masenf]

Try out the Prerelease

If you are a third party component developer or have complex wrapped components, please test your code against the 0.6.0 pre-release as semantics of rx.Var have changed significantly.

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

pip install 'reflex~=0.6.0a'

Schedule

2024-09-11 13:00 PDT: 0.6.0a1 pre-release published for testing
2024-09-17 11:45 PDT: 0.6.0a2 pre-release published for testing
2024-09-20 10:00 PDT: 0.6.0a3 pre-release published
2024-09-24 08:30 PDT: 0.6.0a4 pre-release published
2024-09-24 2:45 PDT: 0.6.0 final release

Changes in 0.6.0a4

• Bring back py3.9 support with a deprecation warning. (Bring back py3.9 support with a deprecation warning. #3976)
• [ENG-3833] handle object in is bool ([ENG-3833] handle object in is bool #3974)
• suggest bool() for wrong values (suggest bool() for wrong values #3975)
• use is true for bool var (use is true for bool var #3973)
• fix set value logix for client state (fix set value logix for client state #3966)

Changes in 0.6.0a3

• bump python>=3.10 for 0.6.0 (bump python>=3.10 for 0.6.0 #3956)
• use current version as default for new custom components (use current version as default for new custom components #3957)
• Add shim for format_event_chain (Add shim for format_event_chain #3958)
• use serializer before serializing base yourself (use serializer before serializing base yourself #3960)
• [ENG-3817] deprecate _var_name_unwrapped (instead of removing it) ([ENG-3817] deprecate _var_name_unwrapped (instead of removing it) #3951)
• move the filterwarning to appropriate file (move the filterwarning to appropriate file #3952)
• fix unionize recursion (fix unionize recursion #3948)
• add special handling for infinity and nan (add special handling for infinity and nan #3943)
• use is true (use is true for boolify #3946)

Changes in 0.6.0a2

• [0.6.0 blocker] state: update inherited_vars and tracking dicts when adding vars ([0.6.0 blocker] state: update inherited_vars and tracking dicts when adding vars #2822)
• expose radix primitive progress under rx.radix.primitives.progress ([ENG-3756] expose radix primitive progress under rx.radix.primitives.progress #3930)
• use serializer for state update and rework serializers (use serializer for state update and rework serializers #3934)
• better errors in state.py ([ENG-3758] better errors in state.py #3929)
• fix template fetch during init (fix template fetch during init #3932)
• Fix string color (Fix string color #3922)
• replace old var system with immutable one (replace old var system with immutable one #3916)
• Remove Pydantic from some classes (Remove Pydantic from some classes #3907)
• [REF-3562][REF-3563] Replace chakra usage ([REF-3562][REF-3563]Replace chakra usage #3872)

Release Notes

Breaking Changes

Drop support for python 3.8 and python3.9

• bump python>=3.10 for 0.6.0 (bump python>=3.10 for 0.6.0 #3956)

Remove Deprecated Features

• rx.input.root

• ... ⚠️

• [REF-3568][REF-3569]Remove deprecations by @ElijahAhianyo in [REF-3568][REF-3569]Remove deprecations #3852

• [REF-3570] Remove deprecated REDIS_URL syntax by @masenf in [REF-3570] Remove deprecated REDIS_URL syntax #3892

New Var System

A Var is a placeholder for a value which is sent to the frontend or rendered as Javascript code in the app. Most users of Reflex do not interact with the var system directly, but it becomes relevant for advanced users that are wrapping components or handling custom types.

• rx.Var.create now returns an ImmutableVar or LiteralVar subclass wrapping the provided value
• _var_is_local - removed, use rx.ivars.ImmutableVar.create
• _var_is_string - removed, passing a string will always create a StringVar
• Vars are not automatically cast as bool, when passing a non-bool var to a prop that expects a boolean, add .bool() after the var.

The new Var system brings a much more accurate translation of literal python values into javascript, especially of object and array types.

rx.chakra removed from main repo

First, pip install reflex-chakra. Then import reflex_chakra as rc. rx.chakra will still work until 0.7.0, but it is recommended to move now to avoid deprecation warning.

• Upper bound for reflex-chakra dependency by @masenf in Upper bound for reflex-chakra dependency #3824
• [REF-3566]Remove demo template by @ElijahAhianyo in [REF-3566]Remove demo template #3888

Var Shadowing Detection

When a dynamic route arg name conflicts with the name of an existing state Var, the framework will raise DynamicRouteArgShadowsStateVar. This is intended to avoid unexpected behavior wherein the dynamic var takes precedence over the state var, even in a substate. A fix for the underlying cause is forthcoming.

In the meantime, define any pages that use dynamic route arguments early, so the dynamic var is available for use in the page functions.

• Dynamic route vars silently shadow all other vars by @benedikt-bartscher in Dynamic route vars silently shadow all other vars #3805
• cleanup dead test code by @benedikt-bartscher in cleanup dead test code #3909

---

When a computed var name conflicts with the name of an existing state Var, the framework will raise ComputedVarShadowsStateVar. ⚠️ [ENG-3758]

• Forbid Computed var shadowing by @benedikt-bartscher in Forbid Computed var shadowing #3843
• remove reference to computed var by @adhami3310 in remove reference to computed var #3906

rx.progress is now Radix Themes Progress

The previous Radis Primitives progress is available as rx.radix.primitives.progress ⚠️ [ENG-3756]

• [REF-3592]Promote rx.progress from radix themes by @ElijahAhianyo in [REF-3592]Promote rx.progress from radix themes #3878

Watchfiles dependency removed

If you are upgrading reflex in an existing environment run pip uninstall watchfiles first to ensure the hot reload mechanism is properly ignoring the .web directory.

New Features

DiskStateManager - preserve state across hot reloads in dev mode

• implement disk state manager by @adhami3310 in implement disk state manager #3826
• Disk state manager don't use byref by @picklelo in Disk state manager don't use byref #3874
• delete states if it exists on run by @adhami3310 in delete states if it exists on run #3901

/_health endpoint

http://localhost:8000/_health

{"status":true,"db":true,"redis":false}

• /health endpoint for K8 Liveness and Readiness probes by @samarth9201 in /health endpoint for K8 Liveness and Readiness probes #3855

Improvements

• improve state hierarchy validation, drop old testing special case by @benedikt-bartscher in improve state hierarchy validation, drop old testing special case #3894
• fix var dependency dicts by @benedikt-bartscher in fix var dependency dicts #3842
• Update docker-example by @masenf in Update docker-example #3324

Var System

• fully migrate vars into new system by @adhami3310 in fully migrate vars into new system #3743
• guess_type: if the type is optional, treat it like it's "not None" by @masenf in guess_type: if the type is optional, treat it like it's "not None" #3839
• Fix double-quoting of defaultColorMode by @masenf in Fix double-quoting of defaultColorMode #3840
• ImmutableVar perf optimizations by @masenf in ImmutableVar perf optimizations #3814
• Get attribute access type fix by @benedikt-bartscher in Get attribute access type fix #3803
• fix var in bare by @adhami3310 in fix var in bare #3873
• add var_operation and move some operations to the new style by @adhami3310 in add var_operation and move some operations to the new style #3841
• Adding array to array pluck operation. by @abulvenz in Adding array to array pluck operation. #3868
• simplify ImmutableComputedVar.get by @benedikt-bartscher in simplify ImmutableComputedVar.__get__ #3902
• Use old serializer system in LiteralVar by @adhami3310 in Use old serializer system in LiteralVar #3875
• Fix type propagation in ToStringOperation by @abulvenz in Fix type propagation in ToStringOperation #3895

Documentation / Error Messages

• Add comments to DataList components by @elviskahoro in Add comments to DataList components #3827
• [REF-3589] raise EventHandlerArgMismatch when event handler args don't match spec by @masenf in [REF-3589] raise EventHandlerArgMismatch when event handler args don't match spec #3853

Other Changes

• Fix benchmark tests by @ElijahAhianyo in Fix benchmark tests #3822
• [REF-3416] [REF-3632] Update fastapi, gunicorn, watchdog deps by @masenf in [REF-3416] [REF-3632] Update fastapi, gunicorn, watchdog deps #3859
• Remove watchfiles and watchdog [REF-2133] [REF-3694] by @picklelo in Remove watchfiles and watchdog [REF-2133] [REF-3694] #3862

Bug Fixes

• [REF-3597]Type check Radio items by @ElijahAhianyo in [REF-3597]Type check Radio items #3856
• Bug fix rx.toast. Allow passing title kwarg by @TimChild in Bug fix rx.toast. Allow passing title kwarg  #3857
• Update find_replace by @samarth9201 in Update find_replace #3886
• Use correct flexgen backend URL by @masenf in Use correct flexgen backend URL #3891
• gitignore .web by @benedikt-bartscher in gitignore .web #3885
• [bugfix] Allow scroll in text_area when limited by max_height by @VishDev12 in [bugfix] Allow scroll in text_area when limited by max_height #3882
• Retain mutability inside async with self block by @masenf in Retain mutability inside async with self block #3884
• Include child imports in markdown component_map by @masenf in Include child imports in markdown component_map #3883
• mixin computed vars should only be applied to highest level state in … by @benedikt-bartscher in mixin computed vars should only be applied to highest level state in … #3833
• fix initial state without cv fallback by @benedikt-bartscher in fix initial state without cv fallback #3670
• add fragment to foreach by @adhami3310 in add fragment to foreach #3877

New Contributors

• @elviskahoro made their first contribution in Add comments to DataList components #3827
• @TimChild made their first contribution in Bug fix rx.toast. Allow passing title kwarg  #3857
• @samarth9201 made their first contribution in /health endpoint for K8 Liveness and Readiness probes #3855
• @VishDev12 made their first contribution in [bugfix] Allow scroll in text_area when limited by max_height #3882

Full Changelog: v0.5.10...reflex-0.6.0

[elviskahoro]

@elviskahoro made their first contribution in #3827

First of many!

[dentroai]

Tested it out on our chatapp that supports image upload and stores messages in the inbuilt reflex database.
Third party components are reflex-clerk and reflex-motion.

All seems to work fine!

[jq6l43d1]

I've tested 0.6.0a2 on my website and overall it's working great. The only wrapped component that doesn't work yet is reflex-audio-capture.

[masenf]

i just published a new version of reflex-audio-capture v0.0.6 that should be good with reflex v0.6.0a3

[masenf]

It's out! https://github.com/reflex-dev/reflex/releases/tag/v0.6.0 Go use it!

[Ernelene]

Hi I have quite a big app with nested states to keep things a bit more organised. I am having a problem with the File name being too long.
Any help would be appreciated.

File "/Users/.../Documents/Code/.../reflex_frontend/.venv/lib/python3.12/site-packages/reflex/state.py", line 2779, in set_state_for_substate await self.set_state_for_substate(client_token, substate_substate) File "/Users/.../Documents/Code/.../reflex_frontend/.venv/lib/python3.12/site-packages/reflex/state.py", line 2776, in set_state_for_substate self.token_path(substate_token).write_bytes(state_dilled) File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/pathlib.py", line 1037, in write_bytes with self.open(mode='wb') as f: ^^^^^^^^^^^^^^^^^^^^ File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/pathlib.py", line 1013, in open return io.open(self, mode, buffering, encoding, errors, newline) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ OSError: [Errno 63] File name too long: '/Users/.../Documents/Code/.../reflex_frontend/.web/states/83783768-0869-4424-cd2c-4cbabd5a11a5_reflex___state____state.frontend___pages___global_state____global_state.frontend___pages___setup___workspaces___workspace_state____workspace_state.frontend___pages___setup___workspaces___workspace_components___drawer___drawer_state____drawer_state.pkl'

[adhami3310]

a PR for this is up: #4000

I am having a problem with the File name being too long.