Re: Django Channels 2.0.0 groups

[Ahmed Magdy]

Finally, I think reverting back to channels 1.x.x was much easier for you 
and me. ^^
Really appreciate what you did and the project, now I can implement the 
chatting functionality for my graduation project.

On Saturday, February 3, 2018 at 9:47:04 AM UTC+2, Andrew Godwin wrote:
>
> Ah, yes, it looks like aioredis requires at least 3.5.2. I will update the 
> channels_redis readme to make this clear.
>
> On Fri, Feb 2, 2018 at 11:44 PM, Ahmed Magdy  > wrote:
>
>> v3.5.1:37a07cee5969
>>
>> On Saturday, February 3, 2018 at 9:41:38 AM UTC+2, Andrew Godwin wrote:
>>>
>>> That looks like a problem with the version of Python you are running - 
>>> what version is it?
>>>
>>> Andrew
>>>
>>> On Fri, Feb 2, 2018 at 11:36 PM, Ahmed Magdy  wrote:
>>>
 Since you closed the issue, I'm posting here.
 Ok, so I've updated asgiref package to 2.1.1 and now getting different 
 exception.


 [2018/02/03 09:29:23] WebSocket HANDSHAKING /sessions/ [127.0.0.1:13235
> ]
> ERROR:root:Exception inside application: '_WindowsSelectorEventLoop' 
> object has no attribute 'create_future'
>   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 51, in __call__
> await await_many_dispatch([receive, self.channel_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 99, in inner
> return await async_func(*args, **kwargs)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>  
> line 79, 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 91, in thread_handler
> raise e
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>  
> line 89, 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\djangoChannels\djangoChannels\consumers.py",
>  
> line 7, in connect
> AsyncToSync(self.channel_layer.group_add)("chat", 
> self.channel_name)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>  
> line 45, in __call__
> call_result.result()
>   File "c:\python35\Lib\concurrent\futures\_base.py", line 405, in 
> result
> return self.__get_result()
>   File "c:\python35\Lib\concurrent\futures\_base.py", line 357, in 
> __get_result
> raise self._exception
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>  
> line 53, in main_wrap
> result = await self.awaitable(*args, **kwargs)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>  
> line 280, in group_add
> pool = await self.connection(self.consistent_hash(group))
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>  
> line 377, in connection
> self.pools[index] = await 
> aioredis.create_redis_pool(**self.hosts[index])
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\commands\__init__.py",
>  
> line 197, in create_redis_pool
> loop=loop)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py",
>  
> line 56, in create_pool
> await pool._fill_free(override_min=False)
>   File 
> 

Re: Django Channels 2.0.0 groups

[Andrew Godwin]

Ah, yes, it looks like aioredis requires at least 3.5.2. I will update the
channels_redis readme to make this clear.

On Fri, Feb 2, 2018 at 11:44 PM, Ahmed Magdy  wrote:

> v3.5.1:37a07cee5969
>
> On Saturday, February 3, 2018 at 9:41:38 AM UTC+2, Andrew Godwin wrote:
>>
>> That looks like a problem with the version of Python you are running -
>> what version is it?
>>
>> Andrew
>>
>> On Fri, Feb 2, 2018 at 11:36 PM, Ahmed Magdy  wrote:
>>
>>> Since you closed the issue, I'm posting here.
>>> Ok, so I've updated asgiref package to 2.1.1 and now getting different
>>> exception.
>>>
>>>
>>> [2018/02/03 09:29:23] WebSocket HANDSHAKING /sessions/ [127.0.0.1:13235]
 ERROR:root:Exception inside application: '_WindowsSelectorEventLoop'
 object has no attribute 'create_future'
   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 51, in __call__
 await await_many_dispatch([receive, self.channel_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 99, in inner
 return await async_func(*args, **kwargs)
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
 line 79, 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 91, in thread_handler
 raise e
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
 line 89, 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 7, in connect
 AsyncToSync(self.channel_layer.group_add)("chat",
 self.channel_name)
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
 line 45, in __call__
 call_result.result()
   File "c:\python35\Lib\concurrent\futures\_base.py", line 405, in
 result
 return self.__get_result()
   File "c:\python35\Lib\concurrent\futures\_base.py", line 357, in
 __get_result
 raise self._exception
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
 line 53, in main_wrap
 result = await self.awaitable(*args, **kwargs)
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
 line 280, in group_add
 pool = await self.connection(self.consistent_hash(group))
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
 line 377, in connection
 self.pools[index] = await aioredis.create_redis_pool(**s
 elf.hosts[index])
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\commands\__init__.py",
 line 197, in create_redis_pool
 loop=loop)
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py",
 line 56, in create_pool
 await pool._fill_free(override_min=False)
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py",
 line 388, in _fill_free
 conn = await self._create_new_connection(address)
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\connection.py",
 line 124, in create_connection
 loop=loop)
   File 
 "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\connection.py",
 line 163, in __init__
 self._close_waiter = loop.create_future()
   '_WindowsSelectorEventLoop' object has no attribute 'create_future'
 [2018/02/03 09:29:24] 

Re: Django Channels 2.0.0 groups

[Ahmed Magdy]

v3.5.1:37a07cee5969

On Saturday, February 3, 2018 at 9:41:38 AM UTC+2, Andrew Godwin wrote:
>
> That looks like a problem with the version of Python you are running - 
> what version is it?
>
> Andrew
>
> On Fri, Feb 2, 2018 at 11:36 PM, Ahmed Magdy  > wrote:
>
>> Since you closed the issue, I'm posting here.
>> Ok, so I've updated asgiref package to 2.1.1 and now getting different 
>> exception.
>>
>>
>> [2018/02/03 09:29:23] WebSocket HANDSHAKING /sessions/ [127.0.0.1:13235]
>>> ERROR:root:Exception inside application: '_WindowsSelectorEventLoop' 
>>> object has no attribute 'create_future'
>>>   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 51, in __call__
>>> await await_many_dispatch([receive, self.channel_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 99, in inner
>>> return await async_func(*args, **kwargs)
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
>>> line 79, 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 91, in thread_handler
>>> raise e
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
>>> line 89, 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\djangoChannels\djangoChannels\consumers.py",
>>>  
>>> line 7, in connect
>>> AsyncToSync(self.channel_layer.group_add)("chat", self.channel_name)
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
>>> line 45, in __call__
>>> call_result.result()
>>>   File "c:\python35\Lib\concurrent\futures\_base.py", line 405, in result
>>> return self.__get_result()
>>>   File "c:\python35\Lib\concurrent\futures\_base.py", line 357, in 
>>> __get_result
>>> raise self._exception
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
>>> line 53, in main_wrap
>>> result = await self.awaitable(*args, **kwargs)
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>>>  
>>> line 280, in group_add
>>> pool = await self.connection(self.consistent_hash(group))
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>>>  
>>> line 377, in connection
>>> self.pools[index] = await 
>>> aioredis.create_redis_pool(**self.hosts[index])
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\commands\__init__.py",
>>>  
>>> line 197, in create_redis_pool
>>> loop=loop)
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py",
>>>  
>>> line 56, in create_pool
>>> await pool._fill_free(override_min=False)
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py",
>>>  
>>> line 388, in _fill_free
>>> conn = await self._create_new_connection(address)
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\connection.py",
>>>  
>>> line 124, in create_connection
>>> loop=loop)
>>>   File 
>>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\connection.py",
>>>  
>>> line 163, in __init__
>>> self._close_waiter = loop.create_future()
>>>   '_WindowsSelectorEventLoop' object has no attribute 'create_future'
>>> [2018/02/03 09:29:24] WebSocket DISCONNECT /sessions/ [127.0.0.1:13235]
>>> [2018/02/03 09:30:24] HTTP GET /sessions/ 503 [60.64, 127.0.0.1:13235]
>>> ERROR:asyncio:Task exception was never retrieved
>>> future: >> 

Re: Django Channels 2.0.0 groups

[Andrew Godwin]

That looks like a problem with the version of Python you are running - what
version is it?

Andrew

On Fri, Feb 2, 2018 at 11:36 PM, Ahmed Magdy  wrote:

> Since you closed the issue, I'm posting here.
> Ok, so I've updated asgiref package to 2.1.1 and now getting different
> exception.
>
>
> [2018/02/03 09:29:23] WebSocket HANDSHAKING /sessions/ [127.0.0.1:13235]
>> ERROR:root:Exception inside application: '_WindowsSelectorEventLoop'
>> object has no attribute 'create_future'
>>   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 51, in __call__
>> await await_many_dispatch([receive, self.channel_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 99, in inner
>> return await async_func(*args, **kwargs)
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>> line 79, 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 91, in thread_handler
>> raise e
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>> line 89, 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\
>> djangoChannels\djangoChannels\consumers.py", line 7, in connect
>> AsyncToSync(self.channel_layer.group_add)("chat", self.channel_name)
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>> line 45, in __call__
>> call_result.result()
>>   File "c:\python35\Lib\concurrent\futures\_base.py", line 405, in result
>> return self.__get_result()
>>   File "c:\python35\Lib\concurrent\futures\_base.py", line 357, in
>> __get_result
>> raise self._exception
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>> line 53, in main_wrap
>> result = await self.awaitable(*args, **kwargs)
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>> line 280, in group_add
>> pool = await self.connection(self.consistent_hash(group))
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>> line 377, in connection
>> self.pools[index] = await aioredis.create_redis_pool(**
>> self.hosts[index])
>>   File "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\
>> aioredis\commands\__init__.py", line 197, in create_redis_pool
>> loop=loop)
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py",
>> line 56, in create_pool
>> await pool._fill_free(override_min=False)
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py",
>> line 388, in _fill_free
>> conn = await self._create_new_connection(address)
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\connection.py",
>> line 124, in create_connection
>> loop=loop)
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\connection.py",
>> line 163, in __init__
>> self._close_waiter = loop.create_future()
>>   '_WindowsSelectorEventLoop' object has no attribute 'create_future'
>> [2018/02/03 09:29:24] WebSocket DISCONNECT /sessions/ [127.0.0.1:13235]
>> [2018/02/03 09:30:24] HTTP GET /sessions/ 503 [60.64, 127.0.0.1:13235]
>> ERROR:asyncio:Task exception was never retrieved
>> future: > D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py:137>
>> exception=AttributeError("'_WindowsSelectorEventLoop'
>> object has no attribute 'create_future'",)>
>> Traceback (most recent call last):
>>   File "c:\python35\Lib\asyncio\tasks.py", line 239, in _step
>> result = coro.send(None)
>>   File 
>> 

Re: Django Channels 2.0.0 groups

[Ahmed Magdy]

Since you closed the issue, I'm posting here.
Ok, so I've updated asgiref package to 2.1.1 and now getting different 
exception.


[2018/02/03 09:29:23] WebSocket HANDSHAKING /sessions/ [127.0.0.1:13235]
> ERROR:root:Exception inside application: '_WindowsSelectorEventLoop' 
> object has no attribute 'create_future'
>   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 51, in __call__
> await await_many_dispatch([receive, self.channel_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 99, in inner
> return await async_func(*args, **kwargs)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
> line 79, 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 91, in thread_handler
> raise e
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
> line 89, 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\djangoChannels\djangoChannels\consumers.py",
>  
> line 7, in connect
> AsyncToSync(self.channel_layer.group_add)("chat", self.channel_name)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
> line 45, in __call__
> call_result.result()
>   File "c:\python35\Lib\concurrent\futures\_base.py", line 405, in result
> return self.__get_result()
>   File "c:\python35\Lib\concurrent\futures\_base.py", line 357, in 
> __get_result
> raise self._exception
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
> line 53, in main_wrap
> result = await self.awaitable(*args, **kwargs)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>  
> line 280, in group_add
> pool = await self.connection(self.consistent_hash(group))
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>  
> line 377, in connection
> self.pools[index] = await 
> aioredis.create_redis_pool(**self.hosts[index])
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\commands\__init__.py",
>  
> line 197, in create_redis_pool
> loop=loop)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py", 
> line 56, in create_pool
> await pool._fill_free(override_min=False)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\pool.py", 
> line 388, in _fill_free
> conn = await self._create_new_connection(address)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\connection.py",
>  
> line 124, in create_connection
> loop=loop)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\aioredis\connection.py",
>  
> line 163, in __init__
> self._close_waiter = loop.create_future()
>   '_WindowsSelectorEventLoop' object has no attribute 'create_future'
> [2018/02/03 09:29:24] WebSocket DISCONNECT /sessions/ [127.0.0.1:13235]
> [2018/02/03 09:30:24] HTTP GET /sessions/ 503 [60.64, 127.0.0.1:13235]
> ERROR:asyncio:Task exception was never retrieved
> future:  D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py:137>
>  
> exception=AttributeError("'_WindowsSelectorEventLoop'
> object has no attribute 'create_future'",)>
> Traceback (most recent call last):
>   File "c:\python35\Lib\asyncio\tasks.py", line 239, in _step
> result = coro.send(None)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\channels_redis\core.py",
>  
> line 158, in receive
> return await self.receive_buffer_lpop(channel)
>   File 
> 

Re: Django Channels 2.0.0 groups

[Andrew Godwin]

Yup, that looks like a genuine bug, I have opened a GitHub issue to track
it: https://github.com/django/channels/issues/848

Andrew

On Fri, Feb 2, 2018 at 10:35 PM, Ahmed Magdy  wrote:

> I even made sure to read the docs multiple times before posting. :/
>
> I've been reading about Redis, and since I got windows OS, I installed the
> port for Windows based redis ,
> tested the server and client they are working ok
> .
>
> # settings.py
> # ...
> ASGI_APPLICATION = 'djangoChannels.routing.application'
>
> CHANNEL_LAYERS = {
>"default": {
>"BACKEND": "channels_redis.core.RedisChannelLayer",
>"CONFIG": {
>"hosts": [("localhost", 6379)],
>},
>},
> }
>
>
> # 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)
>
> raises an exception
>
> [2018/02/03 08:30:19] WebSocket HANDSHAKING /sessions/ [127.0.0.1:12778]
>> ERROR:root:Exception inside application: There is no current event loop
>> in thread 'Thread-3'.
>>   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 51, in __call__
>> await await_many_dispatch([receive, self.channel_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\
>> djangoChannels\djangoChannels\consumers.py", line 7, in connect
>> AsyncToSync(self.channel_layer.group_add)("chat", self.channel_name)
>>   File 
>> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py",
>> line 17, in __init__
>> self.main_event_loop = asyncio.get_event_loop()
>>   File "c:\python35\Lib\asyncio\events.py", line 626, in get_event_loop
>> return get_event_loop_policy().get_event_loop()
>>   File "c:\python35\Lib\asyncio\events.py", line 572, in get_event_loop
>> % threading.current_thread().name)
>>   There is no current event loop in thread 'Thread-3'.
>>
>
> Thanks for what you did so far!
>
> On Saturday, February 3, 2018 at 6:58:56 AM UTC+2, Andrew Godwin wrote:
>>
>> The docs do mention this in a big callout at the top of the Channel
>> Layers page :) http://channels.readthedocs.io/en/latest/topics/channel_
>> layers.html
>>
>> Andrew
>>
>> On Fri, Feb 2, 2018 at 8:52 PM, Ahmed Magdy  wrote:
>>
>>> Aha thanks for making it clear, I will read more about redis then.
>>> Shouldn't the docs mention that though?
>>>
>>> On Saturday, February 3, 2018 at 6:47:47 AM UTC+2, Andrew Godwin wrote:

 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  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 

Re: Django Channels 2.0.0 groups

[Ahmed Magdy]

I even made sure to read the docs multiple times before posting. :/

I've been reading about Redis, and since I got windows OS, I installed the 
port for Windows based redis , 
tested the server and client they are working ok 
.

# settings.py
# ...
ASGI_APPLICATION = 'djangoChannels.routing.application'

CHANNEL_LAYERS = {
   "default": {
   "BACKEND": "channels_redis.core.RedisChannelLayer",
   "CONFIG": {
   "hosts": [("localhost", 6379)],
   },
   },
}


# 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)

raises an exception

[2018/02/03 08:30:19] WebSocket HANDSHAKING /sessions/ [127.0.0.1:12778]
> ERROR:root:Exception inside application: There is no current event loop in 
> thread 'Thread-3'.
>   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 51, in __call__
> await await_many_dispatch([receive, self.channel_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\djangoChannels\djangoChannels\consumers.py",
>  
> line 7, in connect
> AsyncToSync(self.channel_layer.group_add)("chat", self.channel_name)
>   File 
> "D:\Programming\DjangoWebsite\HUWebsite\lib\site-packages\asgiref\sync.py", 
> line 17, in __init__
> self.main_event_loop = asyncio.get_event_loop()
>   File "c:\python35\Lib\asyncio\events.py", line 626, in get_event_loop
> return get_event_loop_policy().get_event_loop()
>   File "c:\python35\Lib\asyncio\events.py", line 572, in get_event_loop
> % threading.current_thread().name)
>   There is no current event loop in thread 'Thread-3'.
>

Thanks for what you did so far!

On Saturday, February 3, 2018 at 6:58:56 AM UTC+2, Andrew Godwin wrote:
>
> The docs do mention this in a big callout at the top of the Channel Layers 
> page :) 
> http://channels.readthedocs.io/en/latest/topics/channel_layers.html
>
> Andrew
>
> On Fri, Feb 2, 2018 at 8:52 PM, Ahmed Magdy  > wrote:
>
>> Aha thanks for making it clear, I will read more about redis then. 
>> Shouldn't the docs mention that though?
>>
>> On Saturday, February 3, 2018 at 6:47:47 AM UTC+2, Andrew Godwin wrote:
>>>
>>> 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  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  

Re: Django Channels 2.0.0 groups

[Andrew Godwin]

The docs do mention this in a big callout at the top of the Channel Layers
page :) http://channels.readthedocs.io/en/latest/topics/channel_layers.html

Andrew

On Fri, Feb 2, 2018 at 8:52 PM, Ahmed Magdy  wrote:

> Aha thanks for making it clear, I will read more about redis then.
> Shouldn't the docs mention that though?
>
> On Saturday, February 3, 2018 at 6:47:47 AM UTC+2, Andrew Godwin wrote:
>>
>> 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  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  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 
>> 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 

Re: Django Channels 2.0.0 groups

[Ahmed Magdy]

Aha thanks for making it clear, I will read more about redis then. 
Shouldn't the docs mention that though?

On Saturday, February 3, 2018 at 6:47:47 AM UTC+2, Andrew Godwin wrote:
>
> 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  > 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  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  
> 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 
>>> 

Re: Django Channels 2.0.0 groups

[Andrew Godwin]

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  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  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  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
>> 

Re: Django Channels 2.0.0 groups

[Ahmed Magdy]

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  > 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  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\djangoChannels\djangoChannels\consumers.py",
>  

Re: Django Channels 2.0.0 groups

[Andrew Godwin]

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  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  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 

Re: Django Channels 2.0.0 groups

[Ahmed Magdy]

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  > 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\djangoChannels\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  wrote:
>>>
 I'm relatively new to 

Re: Django Channels 2.0.0 groups

[Andrew Godwin]

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  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\
>> djangoChannels\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.readthed
>> ocs.io/en/latest/topics/channel_layers.html
>>
>> Andrew
>>
>> On Fri, Feb 2, 2018 at 3:31 AM, Ahmed Magdy  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 

Re: Django Channels 2.0.0 groups

[Ahmed Magdy]

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\djangoChannels\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  > 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 

Re: Django Channels 2.0.0 groups

[Andrew Godwin]

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  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.
>
> --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to django-users+unsubscr...@googlegroups.com.
> To post to this group, send email to django-users@googlegroups.com.
> Visit this group at https://groups.google.com/group/django-users.
> To view this discussion on the web visit https://groups.google.com/d/
> msgid/django-users/fff84d59-da69-47d5-a7c3-ee0221680642%40googlegroups.com
> 
> .
> For more options, visit https://groups.google.com/d/optout.
>

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/CAFwN1uqxVR%2BU%3DJFnOnmuBW7CR23A626uqiGuR98%2B9%3DYUi%3DWVCA%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

Django Channels 2.0.0 groups

[Ahmed Magdy]

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.

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/fff84d59-da69-47d5-a7c3-ee0221680642%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.