Action Cable Channel Callbacks

Action Cable Channel 提供在通道生命週期中呼叫的回呼掛勾

• before_subscribe

• after_subscribe（別名為 on_subscribe）

• before_unsubscribe

• after_unsubscribe（別名為 on_unsubscribe）

範例

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