Implemented hasOne update()

lib/relation-definition.js

@@ -1353,6 +1353,8 @@ RelationDefinition.hasOne = function (modelFrom, modelTo, params) {
       var relationMethod = relation.related.bind(relation)
       relationMethod.create = relation.create.bind(relation);
       relationMethod.build = relation.build.bind(relation);
+      relationMethod.update = relation.update.bind(relation);
+      relationMethod.destroy = relation.destroy.bind(relation);
       relationMethod._targetClass = definition.modelTo.modelName;
       return relationMethod;
     }
@@ -1416,6 +1418,23 @@ HasOne.prototype.create = function (targetModelData, cb) {
   });
 };
 
+HasOne.prototype.update = function (targetModelData, cb) {
+  var definition = this.definition;
+  this.fetch(function(err, inst) {
+    if (inst instanceof ModelBaseClass) {
+      inst.updateAttributes(targetModelData, cb);
+    } else {
+      cb(new Error('HasOne relation ' + definition.name
+        + ' is empty'));
+    }
+  });
+};
+
+HasOne.prototype.destroy = function (cb) {
+  
+
+};
+
 /**
  * Create a target model instance
  * @param {Object} targetModelData The target model data

test/relations.test.js

@@ -1206,6 +1206,7 @@ describe('relations', function () {
 
   describe('hasOne', function () {
     var Supplier, Account;
+    var supplierId;
 
     before(function () {
       db = getSchema();
@@ -1220,9 +1221,9 @@ describe('relations', function () {
     });
 
     it('can be used to query data', function (done) {
-      // Supplier.hasOne(Account);
       db.automigrate(function () {
         Supplier.create({name: 'Supplier 1'}, function (e, supplier) {
+          supplierId = supplier.id;
           should.not.exist(e);
           should.exist(supplier);
           supplier.account.create({accountNo: 'a01'}, function (err, account) {
@@ -1242,6 +1243,32 @@ describe('relations', function () {
     it('should set targetClass on scope property', function() {
       should.equal(Supplier.prototype.account._targetClass, 'Account');
     });
+    
+    it('should update the related item on scope', function(done) {
+      Supplier.findById(supplierId, function(e, supplier) {
+        should.not.exist(e);
+        should.exist(supplier);
+        supplier.account.update({supplierName: 'Supplier A'}, function(err, act) {
+          should.not.exist(e);
+          act.supplierName.should.equal('Supplier A');
+          done();
+        });
+      });
+    });
+    
+    it('should get the related item on scope', function(done) {
+      Supplier.findById(supplierId, function(e, supplier) {
+        should.not.exist(e);
+        should.exist(supplier);
+        supplier.account(function(err, act) {
+          should.not.exist(e);
+          should.exist(act);
+          act.supplierName.should.equal('Supplier A');
+          done();
+        });
+      });
+    });
+    
   });
 
   describe('hasAndBelongsToMany', function () {