无法将符号转换为整数(TypeError)：仅在windows上使用bunny客户端使用bunny弹出队列时

Question

虽然我已经搜索了足够多，但无法获得解决此问题的帮助。我是Ruby的新手，所以如果我错过了一些非常基本的东西，请原谅我。

在windows上执行以下代码时，我收到error "C:/Users/shhashmi/workspace/rabbitmqSender/sender.rb:36:in []': can't convert Symbol into Integer (TypeError) from C:/Users/shhashmi/workspace/rabbitmqSender/sender.rb:36:ingetItem‘from C:/Users/shhashmi/workspace/rabbitmqSender/sender.rb:59:in `'“

然而，代码在CentOS上工作得很好。

require "bunny"
require "net/http"

# Rabbit MQ
@host = "test.host"
@queue = "test.queue"

#@host = "localhost"
#@queue = "TEST"


# Put your target machine here
@target = "http://localhost:3000/"

def getItem
b = Bunny.new(:host=>@host, :port=>5672,)
# start a communication session with the amqp server
                b.start

                # declare a queue
                q = b.queue(@queue, :auto_delete=>true)


                # declare default direct exchange which is bound to all queues
                e = b.exchange("")



                # publish a message to the exchange which then gets routed to the queue

                #e.publish("Hello, everybody! 211", :key => @queue)
                #e.publish("Hello, everybody! 311", :key => @queue)

                # get message from the queue
                msg = q.pop[:payload]

                puts "This is the message: " + msg + "\n\n"

                # close the connection
                b.stop
                return msg
end


getItem

Answer 1

我能够用你的代码重现这个错误。问题出在这一行：

msg = q.pop[:payload]

从队列中弹出消息后，Queue#pop方法返回一个包含3个项的数组。该方法应如下所示：

delivery_info, message_properties, msg = q.pop

现在，您应该在'msg‘变量中看到您的消息有效负载。您可以检查其他两个结果以收集任何有用的信息(例如，队列中剩余消息的数量)，或者如果您不需要它们，则完全忽略它们