由于外键,sequelize事务无法插入?

sequelize.transaction(function(t) {
                 return models.users.create({
                    userType: 'test',
                    username: 'alvin',
                }, {transaction: t}).then(function(user) {
                    return models.job.create({
                        jobType: 'jocker',
                        userId: user.userId // Take away this will work, it is a foreign key
                    });
                }, {transaction: t});
            }).then(function(result) {
                resolve(result);
            }).catch(function(err) {
                reject(err);
            });

为什么?从日志中我可以看到2 sql insert语句,但它没有运行 commit .