transaction support for destroy

lib/dao.js

@@ -327,7 +327,7 @@ module.exports = (function() {
     this.isDirty = isDirty
   }
 
-  DAO.prototype.destroy = function() {
+  DAO.prototype.destroy = function(options) {
     var self  = this
       , query = null
 
@@ -340,10 +340,10 @@ module.exports = (function() {
         if (self.__options.timestamps && self.__options.paranoid) {
           var attr = Utils._.underscoredIf(self.__options.deletedAt, self.__options.underscored)
           self.dataValues[attr] = new Date()
-          query = self.save()
+          query = self.save(options)
         } else {
           var identifier = self.__options.hasPrimaryKeys ? self.primaryKeyValues : { id: self.id };
-          query = self.QueryInterface.delete(self, self.QueryInterface.QueryGenerator.addSchema(self.__factory.tableName, self.__factory.options.schema), identifier)
+          query = self.QueryInterface.delete(self, self.QueryInterface.QueryGenerator.addSchema(self.__factory.tableName, self.__factory.options.schema), identifier, options)
         }
 
         query.on('sql', function(sql) {

lib/query-interface.js

@@ -524,7 +524,7 @@ module.exports = (function() {
     }).run()
   }
 
-  QueryInterface.prototype.delete = function(dao, tableName, identifier) {
+  QueryInterface.prototype.delete = function(dao, tableName, identifier, options) {
     var self      = this
       , restrict  = false
       , cascades  = []
@@ -593,7 +593,7 @@ module.exports = (function() {
 
         var chainer = new Utils.QueryChainer()
 
-        chainer.add(self, 'queryAndEmit', [[sql, dao], 'delete'])
+        chainer.add(self, 'queryAndEmit', [[sql, dao, options], 'delete'])
 
         chainer.runSerially()
         .success(function(results){

test/dao.test.js

@@ -1448,6 +1448,28 @@ describe(Support.getTestDialectTeaser("DAO"), function () {
   })
 
   describe('destroy', function() {
+    it('supports transactions', function(done) {
+      Support.prepareTransactionTest(dialect, this.sequelize, function(sequelize) {
+        var User = sequelize.define('User', { username: Support.Sequelize.STRING })
+
+        User.sync({ force: true }).success(function() {
+          User.create({ username: 'foo' }).success(function(user) {
+            sequelize.transaction(function(t) {
+              user.destroy({ transaction: t }).success(function() {
+                User.count().success(function(count1) {
+                  User.count({ transaction: t }).success(function(count2) {
+                    expect(count1).to.equal(1)
+                    expect(count2).to.equal(0)
+                    t.rollback().success(function() { done() })
+                  })
+                })
+              })
+            })
+          })
+        })
+      })
+    })
+
     it('deletes a record from the database if dao is not paranoid', function(done) {
       var UserDestroy = this.sequelize.define('UserDestroy', {
           name: Support.Sequelize.STRING,