ActionCable.server.broadcast from the console

The default behavior for ActionCable in development mode is to use the async adapter, which operates within the same process only. For inter-process broadcasting, you will need to switch to the redis adapter.

To enable redis in development mode, you will need to edit config/cable.yml:

redis: &redis
  adapter: redis
  url: redis://localhost:6379/1

production: *redis
development: *redis
test: *redis