Mongoose and node.js query two fields at once from mongodb

models.articles.find( { $or: [ {title: query}, {body: query}]}).limit(30).sort('-date').exec(function(err, data){
  if(err) { throw err; }
  res.render('results.jade', {
    locals: {
      page: 'results',
      results: data,
      query: query
    }
  });
});