[channels 2] Send to a single channel from sync code

channel_layer.send seems to be an async function. So how would I call it from sync code? Should asgiref.sync.async_to_sync be used in such case? Also docs don’t mention it being async.

[andriilahuta]

I’ve got another problem. Wrapping with AsyncToSync works only if we are somewhere in asgi app. If I call wrapped function from another process (management command for example) then it fails with Cannot call async functions without an event loop running. If I call it from another process which has its own asyncio loop then it just hangs.

As example, I have the following function:

def send_email(recipient, subject, text):
    channel_layer = get_channel_layer()
    AsyncToSync(channel_layer.send)(
        'email.dispatcher',
        dict(type='dispatch', email=dict(recipient=recipient, subject=subject, text=text))
    )

I’d like it to be multipurpose, and avoid writing 3 different versions of this function. Can something be done about this?

[andrewgodwin]

I’ll try and clean that up if I can replicate the environment it happens in (I already fixed one hanging issue yesterday, but it makes my brain hurt a bit so I need a short break)