title: Update multiple documents by id set. Mongoose
body: <p>I wonder if mongoose has some method to update multiple documents by id set. For example:</p>
  
  <pre><code>for (var i = 0, l = ids.length; i &lt; l; i++) {
      Element.update({'_id': ids[i]}, {'visibility': visibility} ,function(err, records){
          if (err) {
              return false;
          } else {
              return true;
          };
      });
  };
  </code></pre>
  
  <p>What i want to know, that if mongoose can do something like this:</p>
  
  <pre><code>Element.update({'_id': ids}, {'visibility': visibility}, {multi: true} ,function(err, records){
      if (err) {
          return false;
      }
  });
  </code></pre>
  
  <p>where ids is an array of ids, like ['id1', 'id2', 'id3'] - sample array.
  Same question for find.</p>