Saving documents in xml

xml.rb

  desc "Salva arquivos em xml"
  task :export => :environment do
    require 'builder'
		docs = Document.all
    index = 1
    docsarray = []
    docs.each do |doc|
        docsarray.push(doc)
        if docsarray.size % 1000 == 0
            save_xml("documents-rkb-" + index.to_s, docsarray)
            docsarray = []
            index = index + 1 
        end
    end
    
    if docsarray.size > 0
       save_xml("documents-rkb-" + index.to_s, docsarray) 
    end
    
  end


  def save_xml(filename, docs)
		xml = Builder::XmlMarkup.new( :indent => 2 )
    xml.instruct! :xml, :encoding => "UTF-8"
    xml.documents do |documents|
     docs.each do |doc|
			documents.document do |document|
         document.title doc.title
         document.publisher doc.publisher
         document.description doc.description
         document.year doc.year
         document.path doc.attachment.path
         document.type doc.attachment_content_type
         document.size doc.attachment_file_size

         document.tags do |tag|
            doc.tags.each do |t|
               tag.tag t.name
            end	
         end

         document.authors do |author|
           doc.authors do |a|
              author.author a.name
           end	
         end	
        end  
      end
    end    
      filexml = File.new(filename + ".xml", "w", :encondig => "utf-8")
      filexml.write(xml.target!)
      filexml.close
  end