Action Cable 的 Channel 的 Callbacks¶ ↑

Action Cable 的 Channel 在 channel 的生命周期中提供被调用的回调钩子

• before_subscribe

• after_subscribe (别名为 on_subscribe)

• before_unsubscribe

• after_unsubscribe (别名为 on_unsubscribe)

示例¶ ↑

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