如何将这三个值一起转换为年龄？

Question

我们有 3 个值，分别是birthdaybirthmonth 和birthyear，因为在前端每个输入都是独立的。在我使用 node js 的后端，我们希望从这 3 个细节中获取年龄。我们在这里找到了 moment js 的这种用法：moment().diff(moment('20170507', 'YYYYMMDD'), 'years') 但是我的代码使用这样的结果有点不同。

module.exports = {
  async CreateUser(req, res) {
    const schema = Joi.object().keys({
      username: Joi.string()
        .required(),
      email: Joi.string()
        .email()
        .required(),
      password: Joi.string()
        .required(),
        birthday: Joi.number().integer()
        .required().min(2).max(2),
        birthmonth: Joi.number().integer()
        .required().min(2).max(2),
        birthyear: Joi.number().integer()
        .required() 
    });

    const { error, value } = Joi.validate(req.body, schema);
    if (error && error.details) {
      return res.status(HttpStatus.BAD_REQUEST).json({ msg: error.details })
    }

    const userEmail = await User.findOne({
      email: Helpers.lowerCase(req.body.email)
    });
    if (userEmail) {
      return res
        .status(HttpStatus.CONFLICT)
        .json({ message: 'Email already exist' });
    }

    const userName = await User.findOne({
      username: Helpers.firstUpper(req.body.username)
    });
    if (userName) {
      return res
        .status(HttpStatus.CONFLICT)
        .json({ message: 'Username already exist' });
    }

    return bcrypt.hash(value.password, 10, (err, hash) => {
      if (err) {
        return res
          .status(HttpStatus.BAD_REQUEST)
          .json({ message: 'Error hashing password' });
      }
     const age = moment().diff(moment([year, month - 1, day]), 'years');
      const body = {
        username: Helpers.firstUpper(value.username),
        email: Helpers.lowerCase(value.email),
        birthday: (value.bday),
         birthmonth: (value.month),
       birthyear: (value.month),
        password: hash,
       age:age
      };
      User.create(body)
        .then(user => {
          const token = jwt.sign({ data: user }, dbConfig.secret, {
            expiresIn: '5h'
          });
          res.cookie('auth', token);
          res
            .status(HttpStatus.CREATED)
            .json({ message: 'User created successfully', user, token });
        })
        .catch(err => {
          res
            .status(HttpStatus.INTERNAL_SERVER_ERROR)
            .json({ message: 'Error occured' });
        });
    });
  },

对于上述特殊情况，我们如何使用 moment 将这 3 个值转换为年龄？

Answer 1

试试

const age = moment().diff(moment([year, month - 1, day]), 'years');