use fromDb to deserialize data after save in Memory connector

Changes the after `save` callback in the memory connector to use the
`fromDb` method to deserialize the data passed back to upsert and
updateAttributes methods.

lib/connectors/memory.js

@@ -238,6 +238,7 @@ Memory.prototype.updateOrCreate = function (model, data, options, callback) {
 };
 
 Memory.prototype.save = function save(model, data, options, callback) {
+  var self = this;
   var id = this.getIdValue(model, data);
   var cachedModels = this.collection(model);
   var modelData = cachedModels && this.collection(model)[id];
@@ -247,7 +248,7 @@ Memory.prototype.save = function save(model, data, options, callback) {
   }
   this.collection(model)[id] = serialize(data);
   this.saveToFile(data, function(err) {
-    callback(err, data, { isNewInstance: !modelData });
+    callback(err, self.fromDb(model, data), { isNewInstance: !modelData });
   });
 };
 

test/memory.test.js

@@ -389,6 +389,19 @@ describe('Memory connector', function() {
         });
     });
 
+    it('should deserialize values after saving in upsert', function(done) {
+      User.findOne({where: {seq: 1}}, function(err, paul) {
+        User.updateOrCreate({id: paul.id, name: 'Sir Paul McCartney'},
+          function(err, sirpaul) {
+            should.not.exist(err);
+            sirpaul.birthday.should.be.instanceOf(Date);
+            sirpaul.order.should.be.instanceOf(Number);
+            sirpaul.vip.should.be.instanceOf(Boolean);
+            done();
+          });
+      });
+    });
+
     function seed(done) {
       var beatles = [
         {