[Question]RuntimeWarning: coroutine

[Klu1d]

Question

Hello. The code I've attached is working fine. Everything is displaying correctly. However, I'm encountering an error in the console. What could be the problem?

Code sample

import asyncio

import flet as ft

class BotSheet(ft.BottomSheet):
    def __init__(self):
        super().__init__()
        self.is_scroll_controlled=True

    def did_mount(self):
        self.open = True
        self.page.run_task(self.build)

    def will_unmount(self):
        self.open = False

    async def build(self):
        self.content = ft.Container(height=300, bgcolor='red')
        self.update()
        await asyncio.sleep(1)
          

def main(page: ft.Page):
    
    page.add(
        ft.OutlinedButton('Click',            
        on_click=lambda e: page.show_bottom_sheet(BotSheet())
      )
    )

ft.app(main)

Error message

RuntimeWarning: coroutine 'BotSheet.build' was never awaited innerCmds = ctrl._build_add_commands( RuntimeWarning: Enable tracemalloc to get the object allocation traceback

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• I have searched for answers to my question both in the issues and in previous discussions.

[ndonkoHenri]

The build method shouldn't be made async.

Read this: https://python.plainenglish.io/whats-new-in-flet-0-21-0-ca482ab4520b

[Klu1d]

Thank you for your article. With the update 0.21.0, UserControl is now considered deprecated. So, what does that make the 'def build()' method in the code I provided? I assumed it's now a method outside the UserControl context since I'm not inheriting from it anymore.

[FeodorFitsner]

Take a look at this, not yet published, article: https://github.com/flet-dev/website/blob/v2/docs/create/custom-controls.md

[GENRATECODE]

what did_mount also does not async