如何解析我在nodejs应用中收到的错误消息

Question

我正在用Reactjs前端和Node.js后端api制作一个应用程序，在某个地方我遇到类似这样的错误。

但是在这里，我只想得到此消息email: {message: "This email is already taken",，我尝试使用一些在线工具来解析此错误，但是当我尝试使用它们时，我从后端得到了错误。

这是使用errorparser后的错误

(node:14208) UnhandledPromiseRejectionWarning: ReferenceError: errors is not defined
    at exports.default (C:/projects/bookworm-practice/bookworm-api/src/utils/parseErrors.js:5:15)
    at C:/projects/bookworm-practice/bookworm-api/src/routes/users.js:14:54
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:14208) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:14208) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

  

这是我的parseError函数

import _ from 'lodash';

export default function () {
    const result = {};
    _.forEach(errors, (val, key) => {
        result[key] = val.message;
    });
    return result;
}

  

这是我使用parseError的用户功能

import express from 'express';
import User from '../models/User';
import parseErrors from '../utils/parseErrors';

const router = express.Router();

router.post('/', (req, res) => {
    const { email, password } = req.body.user;
    const user = new User({ email });
    user.setPassword(password);
    user.save()
        .then(user => res.json({ user: user.toAuthJSON() }))
        //.catch(err => res.json({ err })); // this is the default one
        .catch(err => res.status(400).json({ errors: parseErrors(err.errors) 
        //this is after adding parseErrors funtion 
    }))
})

export default router;

Answer 1

您的parseErrors函数不包含错误作为参数

import _ from 'lodash';

export default function (errors) {
    const result = {};
    _.forEach(errors, (val, key) => {
    result[key] = val.message;
    });
    return result;
}