Ruby ROXML - how to get an array to render its xml?

Posted by Brian D. on Stack Overflow See other posts from Stack Overflow or by Brian D.
Published on 2010-05-16T14:29:28Z Indexed on 2010/05/17 0:50 UTC
Read the original article Hit count: 304

Filed under:
|

I'm trying to create a Messages object that inherits Array. The messages will gather a group of Message objects. I'm trying to create an xml output with ROXML that looks like this:

<messages>
    <message>
        <type></type>
        <code></code>
        <body></body>
    </message>
    ...
</messages>

However, I can't figure out how to get the message objects in the Messages object to display in the xml. Here is the code I've been working with:

require 'roxml'

class Message
  include ROXML

  xml_accessor :type
  xml_accessor :code
  xml_accessor :body
end

class Messages < Array
  include ROXML

  # I think this is the problem - but how do I tell ROXML that
  # the messages are in this instance of array?
  xml_accessor :messages, :as => [Message]

  def add(message)
    self << message
  end

end


message = Message.new
message.type = "error"
message.code = "1234"
message.body = "This is a test message."

messages = Messages.new
messages.add message

puts messages.length
puts messages.to_xml

This outputs:

1
<messages/>

So, the message object I added to messages isn't getting displayed. Anyone have any ideas? Or am I going about this the wrong way?

Thanks for any help.

© Stack Overflow or respective owner

Related posts about ruby

Related posts about Xml