query interface on model

lib/model.js

@@ -31,16 +31,16 @@ module.exports = (function() {
     return this.__definition.QueryGenerator
   })
 
-  Model.prototype.getQueryInterface = function() {
-    var sequelize = this.__definition.modelManager.sequelize
-    return this.queryInterface = this.queryInterface || new QueryInterface(sequelize)
-  }
+  Model.prototype.__defineGetter__('QueryInterface', function() {
+    return this.__definition.modelManager.QueryInterface
+  })
 
   Model.prototype.save = function() {
     var attr = this.__options.underscored ? 'updated_at' : 'updatedAt'
 
     if(this.hasOwnProperty(attr))
       this[attr] = new Date()
+
     if(this.isNewRecord) {
       var self = this
       var eventEmitter = new Utils.CustomEventEmitter(function() {