how convert a rails3 model to json for most jquery plugins

gistfile1.txt

#http://asciicasts.com/episodes/258-token-fields

@authors = Author.all   
respond_to do |format|   
  format.html   
  format.json { render :json => @authors.map(&:attributes) }   
end

or (jqgrid)

Menu.include_root_in_json = false
json_data = @menus.to_json(:methods => [ :level, :is_leaf ])
#json_data = @menus.to_json()
Menu.include_root_in_json = true
respond_to do |format|
      format.json {
        render :text => '{
         "totalpages" : "1",.
          "currpage" : "1",
          "totalrecords" : ' + @menus.size.to_s + ',
          "menudata" : ' + json_data +'}'
      }
      format.html # index.html.erb
      format.xml  { render :xml => @menus }
    end