DJE-031 Critical Configuration

Missing CHANNEL_LAYERS configuration

Error message

InvalidChannelLayerError: No channel layer configured

djust uses Django Channels for WebSocket communication. Without a properly configured CHANNEL_LAYERS setting, LiveViews cannot broadcast updates to connected clients, and features like push_to_view() will fail.

channels config redis

Affected versions: >=0.2.0

Solution

Before (problematic)

# settings.py
# No CHANNEL_LAYERS defined

After (fixed)

# settings.py — Development
CHANNEL_LAYERS = {
    "default": {
        "BACKEND": "channels.layers.InMemoryChannelLayer"
    }
}

# settings.py — Production
# CHANNEL_LAYERS = {
#     "default": {
#         "BACKEND": "channels_redis.core.RedisChannelLayer",
#         "CONFIG": {
#             "hosts": [("127.0.0.1", 6379)],
#         },
#     }
# }

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