Queries with includes with separate:true now add the source id to the attributes if it was missing

lib/model.js

@@ -610,6 +610,10 @@ validateIncludedElement = function(include, tableNames, options) {
     include.duplicating = false;
     include.duplicating = false;
   }
   }
 
 
+  if (include.separate === true && options.attributes && options.attributes.length && !_.includes(options.attributes, association.source.primaryKeyAttribute)) {
+    options.attributes.push(association.source.primaryKeyAttribute);
+  }
+
   // Validate child includes
   // Validate child includes
   if (include.hasOwnProperty('include')) {
   if (include.hasOwnProperty('include')) {
     validateIncludedElements.call(include.model, include, tableNames, options);
     validateIncludedElements.call(include.model, include, tableNames, options);

test/integration/include/seperate.test.js

@@ -6,6 +6,7 @@ var chai = require('chai')
   , sinon = require('sinon')
   , sinon = require('sinon')
   , Support = require(__dirname + '/../support')
   , Support = require(__dirname + '/../support')
   , Sequelize = require(__dirname + '/../../../index')
   , Sequelize = require(__dirname + '/../../../index')
+  , DataTypes = require(__dirname + '/../../../lib/data-types')
   , current = Support.sequelize
   , current = Support.sequelize
   , Promise = Sequelize.Promise
   , Promise = Sequelize.Promise
   , _ = require('lodash');
   , _ = require('lodash');
@@ -60,6 +61,44 @@ if (current.dialect.supports.groupedLimit) {
         });
         });
       });
       });
 
 
+      it('should work even if the id was not included', function () {
+        var User = this.sequelize.define('User', {
+            name: DataTypes.STRING
+          })
+          , Task = this.sequelize.define('Task', {})
+          , sqlSpy = sinon.spy();
+
+        User.Tasks = User.hasMany(Task, {as: 'tasks'});
+
+        return this.sequelize.sync({force: true}).then(function () {
+          return User.create({
+              id: 1,
+              tasks: [
+                {},
+                {},
+                {}
+              ]
+            }, {
+              include: [User.Tasks]
+            }).then(function () {
+              return User.findAll({
+                attributes: ['name'],
+                include: [
+                  {association: User.Tasks, separate: true}
+                ],
+                order: [
+                  ['id', 'ASC']
+                ],
+                logging: sqlSpy
+              });
+            }).then(function (users) {
+              expect(users[0].get('tasks')).to.be.ok;
+              expect(users[0].get('tasks').length).to.equal(3);
+              expect(sqlSpy).to.have.been.calledTwice;
+            });
+        });
+      });
+
       it('should not break a nested include with null values', function () {
       it('should not break a nested include with null values', function () {
         var User = this.sequelize.define('User', {})
         var User = this.sequelize.define('User', {})
           , Team = this.sequelize.define('Team', {})
           , Team = this.sequelize.define('Team', {})