Action Cable Channel Callbacks

Action Cable Channel provides callback hooks that are invoked during the life cycle of a channel:

• before_subscribe

• after_subscribe (aliased as on_subscribe)

• before_unsubscribe

• after_unsubscribe (aliased as on_unsubscribe)

Example

class ChatChannel < ApplicationCable::Channel
  after_subscribe :send_welcome_message, unless: :subscription_rejected?
  after_subscribe :track_subscription

  private
    def send_welcome_message
      broadcast_to(...)
    end

    def track_subscription
      # ...
    end
end