Warning Messages creating rails app

[vhenry]

Hi,

I'm running ruby 1.8.7 and rails 2.1.0 on ubuntu linux 9.04. When I run the rails command to create a new application and also the ruby/script server command from the terminal window, I get the following message:

/usr/lib/ruby/1.8/xmlsimple.rb:275: warning: already initialized constant KNOWN_OPTIONS
/usr/lib/ruby/1.8/xmlsimple.rb:280: warning: already initialized constant DEF_KEY_ATTRIBUTES
/usr/lib/ruby/1.8/xmlsimple.rb:281: warning: already initialized constant DEF_ROOT_NAME
/usr/lib/ruby/1.8/xmlsimple.rb:282: warning: already initialized constant DEF_CONTENT_KEY
/usr/lib/ruby/1.8/xmlsimple.rb:283: warning: already initialized constant DEF_XML_DECLARATION
/usr/lib/ruby/1.8/xmlsimple.rb:284: warning: already initialized constant DEF_ANONYMOUS_TAG
/usr/lib/ruby/1.8/xmlsimple.rb:285: warning: already initialized constant DEF_FORCE_ARRAY
/usr/lib/ruby/1.8/xmlsimple.rb:286: warning: already initialized constant DEF_INDENTATION
/usr/lib/ruby/1.8/xmlsimple.rb:287: warning: already initialized constant DEF_KEY_TO_SYMBOL
=> Booting Mongrel (use 'script/server webrick' to force WEBrick)

Any idea what this means?

[Mittineague]

What it means?

I have Ruby 1.8 In my installation, xmlsimple.rb is in ruby/lib/ruby/gems/1.8/gems/activesupport-2.1.0/lib/active_support/vendor/xml-simple-1.0.11
The file is the XmlSimple class and has

  private
 
  # Declare options that are valid for xml_in and xml_out.
  KNOWN_OPTIONS = {
    'in'  => %w(
      keyattr keeproot forcecontent contentkey noattr
      searchpath forcearray suppressempty anonymoustag
      cache grouptags normalisespace normalizespace
      variables varattr keytosymbol
    ),
    'out' => %w(
 
      keyattr keeproot contentkey noattr rootname
      xmldeclaration outputfile noescape suppressempty
      anonymoustag indent grouptags noindent
    )
  }
 
  # Define some reasonable defaults.
  DEF_KEY_ATTRIBUTES  = []
  DEF_ROOT_NAME       = 'opt'
  DEF_CONTENT_KEY     = 'content'
  DEF_XML_DECLARATION = "<?xml version='1.0' standalone='yes'?>"
  DEF_ANONYMOUS_TAG   = 'anon'
  DEF_FORCE_ARRAY     = true
  DEF_INDENTATION     = '  '
  DEF_KEY_TO_SYMBOL   = false

If these constants are already initialized, then my guess is that either this file is being called twice, or there is more than one version of it and both are getting called.

The server message indicates that Mongrel is being used as the server, and if you want WEBrick to be the server to - use 'script/server webrick' - on the command line.

Sorry I don't know the exact "why" or "what to do", but I guess if it's running OK I wouldn't worry about it too much for now depending on what you're working on. That is, don't let it stop you from working with Ruby, but when you get a chance look into it some more.

[vhenry]

I'll keep going then (developing my very first rails app), just didn't want to continue if it was going to mean a headache for me down the road.

Thanks,

Veronica

[vhenry]

A possible solution here:

The following script worked for me:

#!/bin/sh

cd /usr/lib/ruby/1.8
if [ -h lib/xmlsimple.rb ]
then
mv lib/xmlsimple.rb lib/xmlsimple.rb.old
mv xmlsimple.rb lib/.
cat > xmlsimple.rb <<!
require 'lib/xmlsimple.rb'
!
else
echo `pwd`/lib/xmlsimple.rb is not a link. Exiting.
fi


haven't tried yet though, maybe in the morning...

[vhenry]

Resolved by updating rails and ruby to latest versions.