注册不工作并抛出params错误

Question

我目前能够使用以前创建的用户凭据登录，并正常使用该应用程序，但无法创建新用户。我在客户端使用React.js，在后端使用Express api。我收到了猫鼬验证错误。所有的身份验证都附带了课程让我们使用的模板，我没有触及任何这些文件。我甚至回过头来比较提交历史树以确保没有任何改变。

这是我的用户架构和注册路由。我尝试从模型中消除唯一性，但这并没有影响它。我知道有很多潜在的地方可能会出错，但如果有人对潜在问题有任何建议，我将永远感激不尽！我在注册表中记录了req.body.credentials并且发送的数据看起来很好。

错误代码：422无法处理的实体服务器端错误：'收到的参数未通过Mongoose验证'

const mongoose = require('mongoose')
const { petSchema } = require('./pet.js')
const { pictureSchema } = require('./picture.js')

const userSchema = new mongoose.Schema({
  email: {
    type: String,
    required: true,
    unique: true
  },
  hashedPassword: {
    type: String,
    required: true
  },
  token: String,
  pets: [petSchema],
  pictures: [pictureSchema]
}, {
  timestamps: true,
  toObject: {
    // remove `hashedPassword` field when we call `.toObject`
    transform: (_doc, user) => {
      delete user.hashedPassword
      return user
    }
  }
})

module.exports = mongoose.model('User', userSchema)

// SIGN UP
// POST /sign-up
router.post('/sign-up', (req, res) => {
  // start a promise chain, so that any errors will pass to `handle`
  console.log(req.body.credentials)
  Promise.resolve(req.body.credentials)
    // reject any requests where `credentials.password` is not present, or where
    // the password is an empty string
    .then(credentials => {
      if (!credentials ||
          !credentials.password ||
          credentials.password !== credentials.password_confirmation) {
        throw new BadParamsError()
      }
    })
    // generate a hash from the provided password, returning a promise
    .then(() => bcrypt.hash(req.body.credentials.password, bcryptSaltRounds))
    .then(hash => {
      // return necessary params to create a user
      return {
        email: req.body.credentials.email,
        hashedPassword: hash
      }
    })
    // create user with provided email and hashed password
    .then(user => User.create(user))
    // send the new user object back with status 201, but `hashedPassword`
    // won't be sent because of the `transform` in the User model
    .then(user => res.status(201).json({ user: user.toObject() }))
    // pass any errors along to the error handler
    .catch(err => handle(err, res))
})