No, there is no in-memory channel layer any more, only Redis is available
at the moment. You must put something into the settings in order to make it
function.

Andrew

On Fri, Feb 2, 2018 at 8:42 PM, Ahmed Magdy <ahmedmgd...@gmail.com> wrote:

> I thought it uses in memory channel layer by default if it's empty? I
> didn't try setting a value, because only redis was available in v2.0.0 and
> I don't like using stuff I don't understand.
>
> On Saturday, February 3, 2018 at 6:08:02 AM UTC+2, Andrew Godwin wrote:
>>
>> It needs to contain a value to work - what value were you trying that was
>> not empty?
>>
>> Andrew
>>
>> On Fri, Feb 2, 2018 at 8:04 PM, Ahmed Magdy <ahmed...@gmail.com> wrote:
>>
>>> I tried not having CHANNEL_LAYERS or setting it to {}
>>> same exception
>>>
>>> On Saturday, February 3, 2018 at 3:36:43 AM UTC+2, Andrew Godwin wrote:
>>>>
>>>> Do you have a CHANNEL_LAYERS setting in your settings file? If so, what
>>>> is it set to?
>>>>
>>>> Andrew
>>>>
>>>> On Fri, Feb 2, 2018 at 5:17 PM, Ahmed Magdy <ahmed...@gmail.com> wrote:
>>>>
>>>>> That's what I did after reading the documentation here's how my
>>>>> channels files look like
>>>>>
>>>>> # settings.py
>>>>> # ...
>>>>> ASGI_APPLICATION = 'djangoChannels.routing.application'
>>>>> # ...
>>>>>
>>>>> # routing.py
>>>>> from django.conf.urls import url
>>>>>
>>>>> from channels.routing import ProtocolTypeRouter, URLRouter
>>>>> from channels.auth import AuthMiddlewareStack
>>>>>
>>>>> from .consumers import ChatConsumer
>>>>>
>>>>> application = ProtocolTypeRouter({
>>>>>    # Empty for now (http->django views is added by default)
>>>>>    'websocket': AuthMiddlewareStack(
>>>>>        URLRouter([
>>>>>            url('^sessions/$', ChatConsumer)
>>>>>        ])
>>>>>    )
>>>>> })
>>>>>
>>>>> # consumers.py
>>>>> from asgiref.sync import AsyncToSync
>>>>> from channels.generic.websocket import WebsocketConsumer
>>>>>
>>>>> class ChatConsumer(WebsocketConsumer):
>>>>>
>>>>>     def connect(self):
>>>>>        AsyncToSync(self.channel_layer.group_add)("chat", self
>>>>> .channel_name)
>>>>>
>>>>>     def disconnect(self):
>>>>>        AsyncToSync(self.channel_layer.group_discard)("chat", self
>>>>> .channel_name)
>>>>>
>>>>>
>>>>> After connecting with JS websocket to
>>>>>
>>>>> ws://127.0.0.1:8000/sessions/
>>>>>>
>>>>>
>>>>> Raises an exception
>>>>>
>>>>> Performing system checks...
>>>>>>
>>>>>> System check identified no issues (0 silenced).
>>>>>> February 03, 2018 - 03:14:29
>>>>>> Django version 2.0.2, using settings 'djangoChannels.settings'
>>>>>> Starting ASGI/Channels development server at http://127.0.0.1:8000/
>>>>>> Quit the server with CTRL-BREAK.
>>>>>> 2018-02-03 03:14:29,799 - INFO - server - HTTP/2 support not enabled
>>>>>> (install the http2 and tls Twisted extras)
>>>>>> 2018-02-03 03:14:29,800 - INFO - server - Listening on endpoint
>>>>>> tcp:port=8000:interface=127.0.0.1
>>>>>> [2018/02/03 03:14:32] WebSocket HANDSHAKING /sessions/ [
>>>>>> 127.0.0.1:8631]
>>>>>> ERROR:root:Exception inside application: 'NoneType' object has no
>>>>>> attribute 'group_add'
>>>>>>   File "c:\python35\Lib\asyncio\tasks.py", line 241, in _step
>>>>>>     result = coro.throw(exc)
>>>>>>   File 
>>>>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels\consumer.py",
>>>>>> line 53, in __call__
>>>>>>     await await_many_dispatch([receive], self.dispatch)
>>>>>>   File 
>>>>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels\utils.py",
>>>>>> line 48, in await_many_dispatch
>>>>>>     await dispatch(result)
>>>>>>   File 
>>>>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>>>>>> line 84, in inner
>>>>>>     return await async_func(*args, **kwargs)
>>>>>>   File 
>>>>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>>>>>> line 67, in __call__
>>>>>>     return await asyncio.wait_for(future, timeout=None)
>>>>>>   File "c:\python35\Lib\asyncio\tasks.py", line 367, in wait_for
>>>>>>     return (yield from fut)
>>>>>>   File "c:\python35\Lib\asyncio\futures.py", line 358, in __iter__
>>>>>>     yield self  # This tells Task to wait for completion.
>>>>>>   File "c:\python35\Lib\asyncio\tasks.py", line 290, in _wakeup
>>>>>>     future.result()
>>>>>>   File "c:\python35\Lib\asyncio\futures.py", line 274, in result
>>>>>>     raise self._exception
>>>>>>   File "c:\python35\Lib\concurrent\futures\thread.py", line 55, in
>>>>>> run
>>>>>>     result = self.fn(*self.args, **self.kwargs)
>>>>>>   File 
>>>>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>>>>>> line 76, in thread_handler
>>>>>>     raise e
>>>>>>   File 
>>>>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>>>>>> line 74, in thread_handler
>>>>>>     self.func(*args, **kwargs)
>>>>>>   File 
>>>>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels\consumer.py",
>>>>>> line 93, in dispatch
>>>>>>     handler(message)
>>>>>>   File 
>>>>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels\generic\websocket.py",
>>>>>> line 19, in websocket_connect
>>>>>>     self.connect()
>>>>>>   File "D:\Programming\DjangoWebsite\HUWebsite\husite\djangoChannel
>>>>>> s\djangoChannels\consumers.py", line 8, in connect
>>>>>>     AsyncToSync(self.channel_layer.group_add)("chat",
>>>>>> self.channel_name)
>>>>>>   'NoneType' object has no attribute 'group_add'
>>>>>> [2018/02/03 03:14:32] WebSocket DISCONNECT /sessions/ [127.0.0.1:8631
>>>>>> ]
>>>>>>
>>>>>
>>>>>
>>>>> On Friday, February 2, 2018 at 7:37:36 PM UTC+2, Andrew Godwin wrote:
>>>>>>
>>>>>> Hi Ahmed,
>>>>>>
>>>>>> In the new release channel layers are optional - if you don't
>>>>>> configure them they will indeed come through as None. The settings format
>>>>>> changed slightly too - you can read more here:
>>>>>> http://channels.readthedocs.io/en/latest/topics/channel_layers.html
>>>>>>
>>>>>> Andrew
>>>>>>
>>>>>> On Fri, Feb 2, 2018 at 3:31 AM, Ahmed Magdy <ahmed...@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> I'm relatively new to channels and was using Channels v1.x.x groups
>>>>>>> easily, but after v2.0.0 update and reading the documentation
>>>>>>>
>>>>>>> # This example uses WebSocket consumer, which is synchronous, and so
>>>>>>> # needs the async channel layer functions to be converted.
>>>>>>> from asgiref.sync import AsyncToSync
>>>>>>>
>>>>>>> class ChatConsumer(WebsocketConsumer):
>>>>>>>
>>>>>>>     def connect(self):
>>>>>>>         AsyncToSync(self.channel_layer.group_add)("chat", 
>>>>>>> self.channel_name)
>>>>>>>
>>>>>>>     def disconnect(self):
>>>>>>>         AsyncToSync(self.channel_layer.group_discard)("chat", 
>>>>>>> self.channel_name)
>>>>>>>
>>>>>>> Enter code here...
>>>>>>>
>>>>>>> channel_layer, channel_name are always NoneType and exception occurs.
>>>>>>>
>>>>>>> Is that because I didn't configure channel layers? But in the old
>>>>>>> version I also used the in memory type and Groups were working well.
>>>>>>>
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