Action Cable Connection Callbacks

在向客户端发送命令时，例如订阅、取消订阅或执行操作，将调用 before_command、after_command 和 around_command 回调。

示例

module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :user

    around_command :set_current_account

    private

    def set_current_account
      # Now all channels could use Current.account
      Current.set(account: user.account) { yield }
    end
  end
end