pls help noob with to_xml

my beginner's luck has vaporized on this one. new to rails; new to
ruby; but been around the block several times.

my model: (Category.rb)

class Category < ActiveRecord::Base
  self.to_xml(:only => [:id, :name], :include => [:entries] )
  has_many :entries
end

without the to_xml mod, everything works fine. With this line in place,
I get the following error:

undefined method 'to_xml' for class:0xb76bef9c

Application Trace:
/usr/lib/ruby/gems/activerecord-2.0.1/lib/active_record/base.rb:1459: in
'method_missing'

Please help!!!!!
should I switch to using rexml?

With that code above, you’re trying to call the class method #to_xml on Category. That method doesn’t exist. #to_xml is an instance method inherited from ActiveRecord::Base. If you want to customize #to_xml, do something like this:

class Category < ActiveRecord::Base
has_many :entries

def to_xml
# your changes here
end
end

Regards,
Craig

Craig Demyanovich wrote:

Yes, your controller would do something like this:

class CategoriesController < ApplicationController

def show
@category = Category.find(params[:id])

respond_to do |format|

  format.html # show.html.erb
  format.xml  { render :xml => @category.to_xml(:only => [:id, :name], :include => [:entries] ) }
end

end

end

Regards,
Craig

Craig Demyanovich wrote:

  def show
    @category = Category.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml { render :xml => @category.to_xml(:only => [:id,
:name], :include => [:entries] ) }

Perfect! Thanks so much for the help!