MongoDB Check for BSON _id based lookups

bson.js

function _checkForBSONId(queryObject){
  if (queryObject.hasOwnProperty('_id')){
    // If we're keying on an autogenned one, MongoDB expects an objectId to look like: ObjectId( "505cfee6d94d451252000001" ) not just ""
    if (queryObject._id.length === 24){
      var BSON = require('mongodb').BSONPure;
      queryObject._id = BSON.ObjectID.createFromHexString(queryObject._id);
    }
  }
  return queryObject;
}