Rails中的内部消息传递 [英] Internal messaging in Rails

问题描述

我正在使用本教程来获取内部消息，这些消息在我的网站上起作用: http://www .novawave.net/public/rails_messaging_tutorial.html

I'm using this tutorial to get internal messages working on my site: http://www.novawave.net/public/rails_messaging_tutorial.html

但是，自从我最新升级到Rails 3以来，我遇到了以下错误:

But, since my latest upgrade to Rails 3, I'm getting this error:

NoMethodError in MsgController#sendmsg
undefined method `each' for #<String:0xcc8acc0>

应用程序跟踪:

app/models/message.rb:16:in `prepare_copies'
app/controllers/msg_controller.rb:140:in `sendmsg'

消息模型:

class Message < ActiveRecord::Base
  belongs_to :author, :class_name => "User"
  has_many :message_copies
  has_many :recipients, :through => :message_copies
  before_create :prepare_copies

  attr_accessor  :to # array of people to send to
  attr_accessible :subject, :body, :to

  def prepare_copies
    return if to.blank?

    to.each do |recipient|
      recipient = User.find(recipient)
      message_copies.build(:recipient_id => recipient.id, :folder_id => recipient.inbox.id)
    end
  end
end

推荐答案

该教程似乎有些过时了.它使用Rails 2.0(可能还有一些同样古老的Ruby版本).

That tutorial seems a bit dated. It uses Rails 2.0 (and probably some equally old Ruby version).

您确定to拥有一个数组(如您的attr_accessor注释中所示)吗?错误消息似乎表明它是一个字符串.

Are you sure that to holds an Array (as indicated in your attr_accessor comment)? The error message seems to indicate that it is a String.

您以前是否已在Ruby 1.8(可能是Rails 2.3的版本)下运行此代码?

Did you previously have this code running under Ruby 1.8 (and, presumably, a version of Rails 2.3)?

在Ruby 1.8中，您可以将each发送到String实例，并且(默认情况下)它将在字符串的行上进行迭代(实际上，它将在$/上拆分并在结果上进行迭代).

In Ruby 1.8 you could send each to String instances and it would (by default) iterate on the lines of the string (actually it would split on $/ and iterate on the result).

在Ruby 1.9中，您需要使用each_line遍历字符串的行.

In Ruby 1.9 you need to use each_line to iterate over the lines of a string.

to.each_line do |recipient|
  …
end

这篇关于Rails中的内部消息传递的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！