bug(scopes) Fix addscope when model does not have any inital scopes. Closes #4243

changelog.md

 # Next
 # Next
 - [FIXED] Map column names with `.field` in scopes with includes. [#4210](https://github.com/sequelize/sequelize/issues/4210)
 - [FIXED] Map column names with `.field` in scopes with includes. [#4210](https://github.com/sequelize/sequelize/issues/4210)
+- [FIXED] `addScope` when the model does not have any initial scopes [#4243](https://github.com/sequelize/sequelize/issues/4243)
 
 
 # 3.5.1
 # 3.5.1
 - [FIXED] Fix bug with nested includes where a middle include results in a null value which breaks $findSeperate.
 - [FIXED] Fix bug with nested includes where a middle include results in a null value which breaks $findSeperate.

lib/model.js

@@ -36,7 +36,7 @@ var Model = function(name, attributes, options) {
     schema: null,
     schema: null,
     schemaDelimiter: '',
     schemaDelimiter: '',
     defaultScope: null,
     defaultScope: null,
-    scopes: null,
+    scopes: [],
     hooks: {},
     hooks: {},
     indexes: []
     indexes: []
   }, options || {});
   }, options || {});
@@ -1342,7 +1342,7 @@ Model.$findSeperate = function(results, options) {
 
 
   var original = results;
   var original = results;
   if (options.plain) results = [results];
   if (options.plain) results = [results];
-  
+
   if (!results.length) return original;
   if (!results.length) return original;
 
 
   return Promise.map(options.include, function (include) {
   return Promise.map(options.include, function (include) {

test/unit/model/scope.test.js

@@ -158,6 +158,14 @@ describe(Support.getTestDialectTeaser('Model'), function() {
   });
   });
 
 
   describe('addScope', function () {
   describe('addScope', function () {
+    it('works if the model does not have any initial scopes', function () {
+      var Model = current.define('model');
+
+      expect(function () {
+        Model.addScope('anything', {});
+      }).not.to.throw();
+    });
+
     it('allows me to add a new scope', function ()  {
     it('allows me to add a new scope', function ()  {
       expect(function () {
       expect(function () {
         Company.scope('newScope');
         Company.scope('newScope');