得到一个错误：slugify：预期的字符串参数

如何解决得到一个错误：slugify：预期的字符串参数

我尝试为电子商务项目创建类别，然后抛出错误 Postman - throws an error

这些是源代码

位置：电子商务后端\index.js

    const express = require('express')
    const env = require('dotenv')
    const app = express()
    const mongoose = require('mongoose')


    //routes
    const authRoutes = require('./routes/auth')
    const adminRoutes = require('./routes/admin/auth')
    const categoryRoutes = require('./routes/category')
    const productRoutes = require('./routes/product')
    const cartRoutes = require('./routes/cart')
    //environment variable or you can say constants
    env.config()

    //mongodb connection
    mongoose.connect(
        `mongodb+srv://${process.env.MONGO_DB_USERS}:${process.env.MONGO_DB_PASSWORD}@cluster0.nglbc.mongodb.net/${process.env.MONGO_DB_DATABASE}?retryWrites=true&w=majority`,{
            useNewUrlParser: true,useUnifiedTopology: true,useCreateIndex: true
        }
    ).then(() => {
        console.log('Database connected')
    });

    app.use(express.json())
    app.use('/api',authRoutes)
    app.use('/api',adminRoutes)
    app.use('/api',categoryRoutes)
    app.use('/api',cartRoutes)
    app.use('/api',productRoutes)

    app.listen(process.env.PORT,() => {
        console.log(`Server is running on port ${process.env.PORT}`)
    })

位置：电子商务后端\routes\category.js

    const express = require('express')
    const { requireSignin,adminMiddleware } = require('../common-middleware')
    const { addCategory,getCategories } = require('../controller/category')
    const router = express.Router()
    const path = require('path')
    const shortid = require('shortid')
    const multer = require('multer')

    const storage = multer.diskStorage({
        destination: function (req,file,cb) {
          cb(null,path.join(path.dirname(__dirname),'uploads'))
        },filename: function (req,shortid.generate() + '-' + file.originalname)
        }
      })

    const upload = multer({ storage })

    router.post('/category/create',requireSignin,adminMiddleware,upload.single('categoryImage'),addCategory)
    router.get('/category/getcategory',getCategories)

    module.exports = router

位置：电子商务后端\models\category.js

    const mongoose = require('mongoose')
    const categorySchema = new mongoose.Schema({

        name: {
            type: String,required: true,trim: true
        },slug: {
            type: String,unique: true
        },categoryImage: {
            type: String,},parentId: {
            type: String
        }

    },{ timestamps: true})

    module.exports = mongoose.model('Category',categorySchema)

位置：电子商务后端\控制器\category.js

const Category = require('../models/category')
const slugify = require('slugify')

function createCategories(categories,parentId = null){

    const categoryList = []
    let category
    if(parentId == null){
        category = categories.filter(cat => cat.parentId == undefined)
    }else{
        category = categories.filter(cat => cat.parentId == parentId)
    }

    for(let cate of category){
        categoryList.push({
            _id: cate._id,name: cate.name,slug: cate.slug,children: createCategories(categories,cate._id)
        })
    }

    return categoryList
}

exports.addCategory = (req,res) => {

    const categoryObj = {
        name: req.body.name,slug: slugify(req.body.name)
    }

    if(req.file){
            categoryObj.categoryImage = process.env.API + '/public/'+ req.file.filename
    }

    if(req.body.parentId){
        categoryObj.parentId = req.body.parentId
    }

    const cat = new Category(categoryObj)
    cat.save((error,category) => {
        if(error) return res.status(400).json({ error})
        if(category){
            return res.status(201).json({ category})
        }
    })
}

exports.getCategories = (req,res) => {
    Category.find({})
    .exec((error,categories) => {
        if(error) return res.status(400).json({error})

        if(categories){

            const categoryList = createCategories(categories)

            res.status(200).json({categoryList})
        }
    })
}

这是我在 ecommerce-backend\ .env 中的 .env 文件

PORT = 2000
MONGO_DB_USERS = mrzombit
MONGO_DB_PASSWORD = ********
MONGO_DB_DATABASE = ecommerce
JWT_SECRET = MERNSECRET
API = http://localhost:2000

我遇到了这个问题然后我无法弄清楚我的代码发生了什么 谢谢！

解决方法

确保您已更改邮递员标题部分中的“内容类型”。

Content-Type: multipart/form-data; boundary=<calculated when request is sent>

,

我只做以下步骤：

1. 从 package.json

   中删除 slugify 包

2. 重新安装 slugify 包：你会看到

   发现了 2 个高危漏洞 运行 npm audit fix 来修复它们，或运行 npm audit 了解详情

3. 运行npm audit fix

4. 打开新窗口！在邮递员和 从 /api/admin/create 复制令牌并将此令牌粘贴到新窗口中：/api/category/create in body,

   表单数据：

   名称（您的数据库中尚不存在）

   categoryImage（点击文件不是文本）