如何向每个连接发送消息

How to send a message to every single connection

我知道在 ActionCable 中,ping 是这样工作的:

def beat
  transmit type: ActionCable::INTERNAL[:message_types][:ping], message: Time.now.to_i
end

但是当我尝试在连接上传输时,只有一个连接收到我的消息 transmit 为什么?

def connect
  self.uuid = SecureRandom.uuid
  transmit({'title': 'players_online', 'message': 'A new user has been subscribed'})
end

其实很简单:

ActionCable.server.connections.each do |connection|
  connection.transmit({'title': 'players_online', 'message': ActionCable.server.connections.size})
end