how to perform transaction with sequelize
return sequelize.transaction().then(function (t) {
return User.create({
firstName: 'Homer',
lastName: 'Simpson'
}, {transaction: t}).then(function (user) {
return user.addSibling({
firstName: 'Lisa',
lastName: 'Simpson'
}, {transaction: t});
}).then(function () {
return t.commit();
}).catch(function (err) {
return t.rollback();
});
});