node.js - 无法使用 Express 从 MongoDB 中使用 ID 检索数据

问题描述

我使用 NodeJS、Express 和 MongoDB 创建了一个 rest API。我可以使用 MongoDB Compass 成功创建数据并在数据库中查看它们，但无法使用生成的 Id 获取单个数据。每当我尝试时，它都会给我一个 404 错误。

这是我的代码：

bootcamps.js（控制器）

 const Bootcamp = require('../models/Bootcamp')

 exports.getBootcamps = async (req, res, next) =>
 {
     try {
         const bootcamps = await Bootcamp.find()

         res.status(200).json({success: true, count: bootcamps.length, data: bootcamps})
     } catch (error) {
         res.status(400).json({success: false})
     }
 }




 exports.getBootcamp = async (req, res, next) =>
 {
     try {
         const bootcamp = await Bootcamp.findById({_id: req.params.id})

         if (!bootcamp)
         {
             return res.status(400).json({success: false})
         }


         res.status(200).json({success: true, data: bootcamp})
     } catch (error) {
         res.status(400).json({success: false})
     }

 }


 exports.createBootcamps = async (req, res, next) =>
 {
     try
     {
         const bootcamp = await Bootcamp.create(req.body)

         res.status(201).json({
             success: true,
             data: bootcamp,
             msg: 'Bootcamp created'
         })


     } catch (error)
     {
         console.log(error)
        res.status(400).json({success: false})
    }
 }


 exports.updateBootcamp = async (req, res, next) =>
 {
    try {
     const bootcamp = await Bootcamp.findByIdAndUpdate(req.params.id, req.body, {
         new: true,
         runValidators: true
     });

     if (!bootcamp)
     {
         return res.statuc(400).json({success: false})
     }

     res.status(200).json({ success: true, data: bootcamp })
    } catch (error) {
     return res.statuc(400).json({success: false})
    }

 }


 exports.deleteBootcamp = async (req, res, next) =>
 {
     try {
         const bootcamp = await Bootcamp.findByIdAndDelete(req.params.id);

         if (!bootcamp)
         {
             return res.statuc(400).json({success: false})
         }

         res.status(200).json({ success: true, data: {} })
        } catch (error) {
         return res.statuc(400).json({success: false})
        }

 }

Bootcamp.js（模型）

     const mongoose = require('mongoose')


     const BootcampSchema = new mongoose.Schema({
 name: {
     type: String,
     required: [true, 'Please add a name'],
     unique: true,
     trim: true,
     maxlength: [50, 'Name can not be more than 50 characters']
 },
 slug: String,
 description: {
     type: String,
     required: [true, 'Please add a description'],
     maxlength: [500, 'Name can not be more than 50 characters']
 },
 website: {
     type: String,
     match: [
         /https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)/,
         "Please use a valid URL with HTTP or HTTPS"
     ]
 },
 phone: {
     type: String,
     maxlength: [20, 'Phone number can not be longer than 20 characters']
 },
 email: {
     type: String,
     match: [
         /^\w+([\.-]?\w+)+@\w+([\.:]?\w+)+(\.[a-zA-Z0-9]{2,3})+$/,
         'Please add a valid email address'
     ]
 },
 address: {
     type: String,
     required: [true, 'Please add an address']
 },
 location: {
     type: {
         type: String,
         enum: ['Point'],
         required: false
     },
     coordinates: {
         type: [Number],
         required: false,
         index: '2dsphere'
     }
 },
 formattedAddress: String,
 street: String,
 city: String,
 state: String,
 zipcode: String,
 country: String,
 careers: {
     type: [String],
     required: true,
     enum: [
         'Web Development',
         'Mobile Development',
         'UI/UX',
         'Data Science',
         'Business',
         'Other'
     ]
 },
 averageRating: {
     type: Number,
     min: [1, 'Rating must be at least 1'],
     max: [10, 'Rating can not be more than 10']
 },
 averageCost: Number,
 photo: {
     type: String,
     default: 'no-photo.jpg'
 },
 housing: {
     type: Boolean,
     default: false
 },
 jobAssistance: {
     type: Boolean,
     default: false
 },
 jobGuarantee: {
     type: Boolean,
     default: false
 },
 acceptGi: {
     type: Boolean,
     default: false
 },
 createdAt: {
     type: Date,
     default: Date.now
 }
});

module.exports = mongoose.model('Bootcamp', BootcampSchema)

bootcamps.js（路线）

 const express = require('express')
 const { getBootcamp, getBootcamps, createBootcamps, updateBootcamp, deleteBootcamp } = require('../controllers/bootcamps')


 const router = express.Router()


 router.route('/').get(getBootcamps).post(createBootcamps)


  router.route(':id').put(updateBootcamp).delete(deleteBootcamp).get(getBootcamp)


 module.exports = router

index.js（入口文件）

 const express = require('express')
 const dotenv = require('dotenv')
 const morgan = require('morgan')
 const connectDB = require('./config/db')
 const colors = require('colors')

 dotenv.config({ path: './config/config.env' })

 connectDB()


 const bootcamps = require('./routes/bootcamps')

 const app = express();


 app.use(express.json())

 if (process.env.NODE_ENV === 'development')
 {
     app.use(morgan('dev'))
 }

 app.use('/api/v1/bootcamps', bootcamps)

 const PORT = process.env.PORT || 5000


 const server = app.listen(PORT, console.log(`Server is running in 
${process.env.NODE_ENV} mode on port ${PORT}`.yellow.bold))


 process.on(`unhandledRejection`, (err, promise) =>
 {
     console.log(`Error: ${err.message}`.red)
     server.close(() => process.exit(1))
 })

标签： node.jsmongodbexpressmongoose

node.js - 无法使用 Express 从 MongoDB 中使用 ID 检索数据

问题描述

解决方案

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