v0.7.9 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~=0.7.9a'

Schedule

2025-04-24 17:40 PST: 0.7.9a1 pre-release published for testing
2025-04-28 12:40 PST: 0.7.9a2 pre-release published for testing
2025-04-28: Planned Public release of 0.7.9

0.7.9a2

• delay api mounting until app finishes compile by @adhami3310 in delay api mounting until app finishes compile #5184
• add no interactive back by @adhami3310 in add no interactive back #5191
• fix for set_focus not binding this by @adhami3310 in fix for set_focus not binding this #5183
• restore get_decorated_pages behavior and deprecate it by @adhami3310 in restore get_decorated_pages behavior and deprecate it #5194

Release Notes

Improvements to Tailwind Config Wrapping

Thanks to @itsmeadarsh2008, the tailwind config got expanded:

plugins = [
    "@tailwindcss/forms",  # simple require
    {
        "name": "@heroui/theme",
        "import": {"name": "heroui", "from": "@heroui/theme"},
        "call": "heroui"
    },
    {
        "name": "tailwindcss-theme-variants",
        "import": {"name": "themeVariants", "from": "tailwindcss-theme-variants"},
        "call": "themeVariants",
        "args": {
            "themes": {
                "light": { "selector": ".light-theme" },
                "dark": { "selector": ".dark-theme" }
            }
        }
    }
]

• Support for importing functions from tailwind plugins by @itsmeadarsh2008 in Support for importing functions from tailwind plugins #5121

Enable Granian as default

We have had fixes going into Granian that should make the experience as good as it was on Uvicorn/Gunicorn and in some cases better. There are most certainly issues so feel free to report them and we will do our best to mitigate them.

• reattempt at granian as default by @adhami3310 in reattempt at granian as default #5165

Include all rx.memo components in the build

This saves us from doing another scan to discover them.

This also adds the ability to call memoized components from dynamic components!

class State(rx.State):
    name: str = "Bob"

    @rx.var
    def count(self) -> rx.Component:
        return counter(
            name=self.name,
        )


@rx.memo
def counter(name: str):
    return rx.hstack(
        rx.button(name),
        rx.button(f"Not {name}"),
    )


def index():
    return rx.vstack(rx.text("Who Are You?"), State.count)

• Track all rx.memo components by @masenf in Track all rx.memo components #5172

Deprecate .api in favor of api_transformer

If you were doing something like:

app = rx.App()

@app.api.get("/pong")
def pong():
    return {"message": "pong"}

You should instead do

fastapi_app = FastAPI()

@fastapi_app.get("/pong")
def pong():
    return {"message": "pong"}

app = rx.App(api_transformer=fastapi_app)

The api_transformer takes one or multiple (a list) of Starlette/FastAPI apps. It can also take a function that takes ASGIApp and returns a different ASGIApp that mounts the previous one. For example, the above code is equivalent to:

from reflex.utils.types import ASGIApp

fastapi_app = FastAPI()

@fastapi_app.get("/pong")
def pong():
    return {"message": "pong"}

def fastapi_transformer(app: ASGIApp):
    fastapi_app.mount("", app)
    return app

app = rx.App(api_transformer=fastapi_transformer)

• starlette over fastapi by @adhami3310 in starlette over fastapi #5069
• delay api mounting until app finishes compile by @adhami3310 in delay api mounting until app finishes compile #5184

Raise error when using @rx.event with events starting with an underscore.

Private events is not a thing and this can help to error earlier.

• raise error on private events by @adhami3310 in raise error on private events #5152

Replace typer with click

In our quest to cut down on dependencies we are simplifying our CI across reflex and reflex-hosting-cli to use click over typer (which what typer uses under the hood).

• click over typer by @adhami3310 in click over typer #5154
• add no interactive back by @adhami3310 in add no interactive back #5191

Misc

• output a slightly more helpful error message when we cannot download … by @adhami3310 in output a slightly more helpful error message when we cannot download … #5140
• treat small tuples different with figure out type by @adhami3310 in treat small tuples different with figure out type #5161
• bump frontend deps and bun by @adhami3310 in bump frontend deps and bun #5162

Bugfixes

• handle deocrated pages better by @adhami3310 in handle deocrated pages better #5159
• exit gracefully when set_focus is passed a nonexistent argument by @adhami3310 in exit gracefully when set_focus is passed a nonexistent argument #5149
• error when var is given something not a str by @adhami3310 in error when var is given something not a str #5164
• ignore env var set to empty string by @adhami3310 in ignore env var set to empty string #5167
• fix upload on drop by @adhami3310 in fix upload on drop #5160
• fix for set_focus not binding this by @adhami3310 in fix for set_focus not binding this #5183
• restore get_decorated_pages behavior and deprecate it by @adhami3310 in restore get_decorated_pages behavior and deprecate it #5194

Chores

• properly shutdown socketio and sqlalchemy async engine in AppHarness by @benedikt-bartscher in properly shutdown socketio and sqlalchemy async engine in AppHarness #5146
• bump to 0.7.9dev by @adhami3310 in bump to 0.7.9dev #5145
• remove distro by @adhami3310 in remove distro #5158
• remove minor version from ci by @adhami3310 in remove minor version from ci #5163
• uv lock by @adhami3310 in uv lock #5176

New Contributors

• @itsmeadarsh2008 made their first contribution in Support for importing functions from tailwind plugins #5121

Full Changelog: v0.7.8...release/reflex-0.7.9

[bertbarabas]

I get a new kind of exception with focus:

[adhami3310]

#5183

[bertbarabas]

I have another exception now that wasn't there with 0.7.8:

sqlalchemy.exc.InterfaceError: (psycopg.InterfaceError) Psycopg cannot use the 'ProactorEventLoop' to run in async mode. Please use a compatible event loop, for instance by setting 'asyncio.set_event_loop_policy(WindowsSelectorEventLoopPolicy())'

I do set the event loop policy in rxconfig.py and that worked before but now it doesn't...

[benedikt-bartscher]

you are running windows, right? haven't seen this on linux

[bertbarabas]

Correct.

I was getting this in earlier versions too which is why I added

asyncio.set_event_loop_policy(asyncio.WindowsSelectorEventLoopPolicy())

to rxconfig.py which solved it in 0.7.8 but now it's broken again in the 0.7.9

Maybe it's getting overridden now but wasn't before?

[adhami3310]

I do set the event loop policy in rxconfig.py

maybe you need to set it in the main app file?

[bertbarabas]

Seems to work in the main app!

[bertbarabas]

How should I fix this error that started being reported in 0.7.9?

Warning: Page login is being redefined with the same component.

[adhami3310]

you are redefining index twice, maybe you are using rx.page and add_page?

[bertbarabas]

exactly what I was doing! I didn't even realize I started doing both at some point. Nice error catch !