Express Validator 的值无效答案

【问题标题】：Invalid Value with Express ValidatorExpress Validator 的值无效
【发布时间】：2021-08-20 08:33:21
【问题描述】：

我对 Sequelize 有点陌生，目前遇到了一些问题，我似乎无法找到究竟是什么问题。

当前使用 express-validator 执行自定义验证，如果电子邮件存在，但无论结果如何，它总是会返回一个错误，说电子邮件已经存在于日志中，但在我的邮递员上，它显示无效值，即使它很明显，电子邮件不存在。以下是我的查询

const { check, body, validationResult } = require('express-validator')
const bcrypt = require('bcrypt')
const db = require('../app/models')
const MerchantTemp = db.rest.models.MerchantTemp

const signupValidation = () => {
    return [
        body('firstname')
            .not().isEmpty().trim().withMessage('Firstname field is required'),
        body('lastname')
            .not().isEmpty().trim().withMessage('Lastname field is required'),
        body('phone')
            .not().isEmpty().trim().withMessage('Phone Number field is required')
            .isNumeric().withMessage('Phone Number field can only contain Numbers')
            .isLength({min: 11, max: 13}).withMessage('Phone Number field can only contain minimum of 11 and max of 13 digits respectively'),
        body('email')
            .not().isEmpty().trim().withMessage('Email Address field is required')
            .isEmail().withMessage('Email field is not a valid format').normalizeEmail()
            .custom((value, { req }) => {
/**
** HAVING DIFFICULTY HERE
**/
                MerchantTemp.findOne({ where: { email: req.body.email } })
                    .then((result) => {
                        if (result != null){
                            throw new Error('Email address is already in use.Please try another one!');
                        }
                    }).catch(error => {
                        throw new Error(error);
                    })
            }),
        body('password')
            .not().isEmpty().trim().withMessage('Password field is required')
            .isStrongPassword(
                {
                    minLength: 6, 
                    minLowercase: 1, 
                    minUppercase: 1, 
                    minSymbols: 1
                }).withMessage('Password is too weak. Field must contain min. of 6 characters, 1 lowercase and uppercase character and a symbol')
    ]
}

const validate = (req, res, next) => {
    const errors = validationResult(req)
    if (errors.isEmpty()) {
        return next()
    }
    const extractedErrors = []
    errors.array().map(err => extractedErrors.push({ msg: err.msg }))

    // console.log(errors.array());

    res.status(200).json({
        statusCode: 400,
        errors: extractedErrors
    })
}

module.exports = {
    signupValidation,
    validate
}

对邮递员的回应

{
  "statusCode": 400,
  "errors": [
    {
      "msg": "Invalid value"
    }
  ]
}

【问题讨论】：

这里的任何帮助将不胜感激

标签： node.js express orm sequelize.js

【解决方案1】：

我在这里找到了解决方案https://express-validator.github.io/docs/custom-error-messages.html

我所做的是替换电子邮件正文的自定义验证中的代码，如下所示

return MerchantTemp.findOne({ where: { email: req.body.email } }).then(user => {
                    if (user) {
                        return Promise.reject('E-mail already in use');
                    }
                });

【讨论】：