node.js - 如何在 node.js 中为单独的路由文件和 api 文件更正我的代码

Question

目前，我有这个用户模块的 3 个文件

1. routers/user.js（到目前为止，所有路由器功能都驻留在此文件中，我想在 userServiceAPI.js 中将它们分开）
2. 模型/user.js
3. userserviceAPI.js（我需要帮助）

这是我的路由器/user.js

const express = require('express')
const User = require('../models/user')
const userModel=require('../models/user')
const router = new express.Router()
const multer = require('multer')
const userApi = require('../services/userservice.api')
//const sharp = require('sharp')
const auth = require('../db/auth')

//My trial code for separate API file
router.post('/addUser',userApi.addUser)


router.post('/users', async (req, res) => {
    const user = new User(req.body)

    try {
        await user.save()
        const token = await user.generateAuthToken()
        res.status(201).send({ user, token })
    } catch (e) {
        res.status(400).send(e)
    }
})

router.post('/users/login', async (req, res) => {
    try {
        const user = await User.findByCredentials(req.body.email, req.body.password)
        const token = await user.generateAuthToken()
        res.send({ user, token })
    } catch (e) {
        res.status(400).send()
    }
})

router.post('/users/logout', auth, async (req, res) => {
    try {
        req.user.tokens = req.user.tokens.filter((token) => {
            return token.token !== req.token
        })
        await req.user.save()

        res.send()
    } catch (e) {
        res.status(500).send()
    }
})

router.post('/users/logoutAll', auth, async (req, res) => {
    try {
        req.user.tokens = []
        await req.user.save()
        res.send()
    } catch (e) {
        res.status(500).send()
    }
})

router.get('/users/me', auth, async (req, res) => {
    res.send(req.user)
})

router.patch('/users/me', auth, async (req, res) => {
    const updates = Object.keys(req.body)
    const allowedUpdates = ['name', 'email', 'password', 'age']
    const isValidOperation = updates.every((update) => allowedUpdates.includes(update))

    if (!isValidOperation) {
        return res.status(400).send({ error: 'Invalid updates!' })
    }

    try {
        updates.forEach((update) => req.user[update] = req.body[update])
        await req.user.save()
        res.send(req.user)
    } catch (e) {
        res.status(400).send(e)
    }
})

router.delete('/users/me', auth, async (req, res) => {
    try {
        await req.user.remove()
        res.send(req.user)
    } catch (e) {
        res.status(500).send()
    }
})

const upload = multer({
    limits: {
        fileSize: 1000000
    },
    fileFilter(req, file, cb) {
        if (!file.originalname.match(/\.(jpg|jpeg|png)$/)) {
            return cb(new Error('Please upload an image'))
        }

        cb(undefined, true)
    }
})

router.post('/users/me/avatar', auth, upload.single('avatar'), async (req, res) => {
    const buffer = await sharp(req.file.buffer).resize({ width: 250, height: 250 }).png().toBuffer()
    req.user.avatar = buffer
    await req.user.save()
    res.send()
}, (error, req, res, next) => {
    res.status(400).send({ error: error.message })
})

router.delete('/users/me/avatar', auth, async (req, res) => {
    req.user.avatar = undefined
    await req.user.save()
    res.send()
})

router.get('/users/:id/avatar', async (req, res) => {
    try {
        const user = await User.findById(req.params.id)

        if (!user || !user.avatar) {
            throw new Error()
        }

        res.set('Content-Type', 'image/png')
        res.send(user.avatar)
    } catch (e) {
        res.status(404).send()
    }
})

module.exports = router 

这是我的userserviceAPI.js

const express = require('express')
const userModel = require('../models/user')
const router = new express.Router()
const multer = require('multer')
const auth = require('../db/auth')

const addUser = (req, res, next) => {
    const user = new userModel(req.body)
    const token = user.generateAuthToken()
    userModel.create(req.body, (err, result) => {
        if (err) return res.status(400).json({ message: 'Please enter correct information.' }) 
        if (result) {
            return res.status(200).send({ user, token }).json({result : result})
        }
    })
}

module.exports = {
    addUser
}

这是完美执行我能够从邮递员添加数据我的数据成功显示在 Robo 3T 中，但在可视终端中出现以下错误消息：

(node:819) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.
Server is up on port 3000
events.js:187
      throw er; // Unhandled 'error' event
      ^

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
    at ServerResponse.setHeader (_http_outgoing.js:485:11)
    at ServerResponse.header (/Users/ruksz/Desktop/E-comm/node_modules/express/lib/response.js:771:10)
    at ServerResponse.send (/Users/ruksz/Desktop/E-comm/node_modules/express/lib/response.js:170:12)
    at ServerResponse.json (/Users/ruksz/Desktop/E-comm/node_modules/express/lib/response.js:267:15)
    at /Users/ruksz/Desktop/E-comm/services/userservice.api.js:13:58
    at /Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/helpers/promiseOrCallback.js:24:16
    at Function.<anonymous> (/Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:4855:21)
    at _done (/Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:3071:12)
    at /Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:3080:18
    at callbackWrapper (/Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:3036:11)
    at /Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:4832:16
    at /Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/helpers/promiseOrCallback.js:24:16
    at /Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:4855:21
    at model.<anonymous> (/Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:496:7)
    at /Users/ruksz/Desktop/E-comm/node_modules/kareem/index.js:315:21
    at next (/Users/ruksz/Desktop/E-comm/node_modules/kareem/index.js:209:27)
Emitted 'error' event on Function instance at:
    at /Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:4834:13
    at /Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/helpers/promiseOrCallback.js:24:16
    at /Users/ruksz/Desktop/E-comm/node_modules/mongoose/lib/model.js:4855:21
    [... lines matching original stack trace ...]
    at next (/Users/ruksz/Desktop/E-comm/node_modules/kareem/index.js:209:27)
    at /Users/ruksz/Desktop/E-comm/node_modules/kareem/index.js:182:9
    at /Users/ruksz/Desktop/E-comm/node_modules/kareem/index.js:507:38
    at processTicksAndRejections (internal/process/task_queues.js:75:11)
[nodemon] app crashed - waiting for file changes before starting...

我要做的就是将此路由器 API 分离到另一个文件中。提前致谢。

标签： node.jsexpressmean-stack

Answer 1

所以这里有两个问题：

1. 将您的行替换userModel.create(req.body, (err, result) => {为return userModel.create(req.body, (err, result) => {

2. 您在电子邮件 ID 上有一个唯一键，并且您正在尝试插入重复的电子邮件，这就是您收到email_1 dup key: { email: "[e-mail]" }错误的原因。添加检查以查找重复的电子邮件 ID。