queryinterface on sequelize

lib/sequelize.js

-var Utils        = require("./utils")
-  , ModelFactory = require("./model-factory")
-  , DataTypes    = require('./data-types')
-  , ModelManager = require("./model-manager")
-  , Migrator     = require("./migrator")
+var Utils          = require("./utils")
+  , ModelFactory   = require("./model-factory")
+  , DataTypes      = require('./data-types')
+  , ModelManager   = require("./model-manager")
+  , Migrator       = require("./migrator")
+  , QueryInterface = require("./query-interface")
 
 module.exports = (function() {
   var Sequelize = function(database, username, password, options) {
@@ -32,6 +33,11 @@ module.exports = (function() {
   Sequelize.Utils = Utils
   Sequelize.Utils._.map(DataTypes, function(sql, accessor) { Sequelize[accessor] = sql})
 
+  Sequelize.prototype.getQueryInterface = function() {
+    this.queryInterface = this.queryInterface || new QueryInterface(this)
+    return this.queryInterface
+  }
+
   Sequelize.prototype.define = function(modelName, attributes, options) {
     options = options || {}