未使用NodeJS、ExpressJS和EJS保存到MongoDB数据库的数据

Question

我正在使用ExpressJS mongoose和EJS在NodeJS中创建一个日托管理web应用程序。其中有一个模块用于添加参与者，另一个模块用于跟踪参与者每天四次用餐的次数。我正在将Participant Schema引用到考勤模式。参与者集合在出勤页面上显示得很好，但是当我向出勤方案发送post请求时，它不会传递到数据库。由于我是新来的，我找不到我的错误。谁能帮帮我，我哪里弄错了？

模式：

const mongoose = require('mongoose')

const attendanceSchema = new mongoose.Schema({
    _id: {
        type: String,
        required: [true, 'Id is required']
    },
    mDate: {
        type: Date,
        unique: true,
        default:  Date.now,
        required: [true, 'Date is required'],
        aMeal: {
            Breakfast: {
                type: String,
                default: ''
            },
            Lunch: {
                type: String,
                default: ''
            },
            pmSnacks: {
                type: String,
                default: ''
            },
            Dinner: {
                type: String,
                default: ''
            }
        }
    },
    participant: {
        type: mongoose.Schema.Types.ObjectId,
        required: true,
        ref: 'Participant'
    }
}, { timestamps: true })

module.exports = mongoose.model('Attendance', attendanceSchema)

路由

const express = require('express')
const router = express.Router()
const Participant = require('../models/participants/new')
const Attendance = require('../models/attendance/new')

router.get('/', async (req, res) => {
    showattendance(res, new Attendance())
})

router.post('/', async (req, res) => {
    const attendance = new Attendance({
        pId: req.body.pId,
        Breakfast: req.body.Breakfast,
        Lunch: req.body.Lunch,
        PmSnacks: req.body.PmSnacks,
        Dinner: req.body.Dinner
    })
    try {
        const newAttendance = await attendance.save()
        res.redirect(`attendance`)
    } catch {
        showattendance(res, attendance, true)
    }
})

async function showattendance (res, attendance, hasError = false){
    try {
        const participants = await Participant.find({}).sort({ createdAt: 'desc' })
        const params = {
            participants: participants,
            attendance: attendance
        }
        if (hasError) params.Msg = 'Error updating attendance'
        res.render('attendance', params)
    } catch {
        res.redirect('/')
    }
}

module.exports = router

视图

<% if (participants.lenth !== 0) { participants.forEach(participant => { %>
    <div  class="flex bg-light">
        <div class="flex w-55 bt-white-1">
            <div class="w-20 p-5-10 br-white-1"><a href="/participant/edit"><%= participant._id %></a></div>
            <div class="w-35 p-5-10 br-white-1"><%= participant.fName %> <%= participant.lName %></div>
            <div class="w-15 p-5-10 br-white-1"><%= participant.Schedule %></div>
            <div class="w-30 p-5-10 br-white-1"><%= participant.Grade %></div>
        </div>
        <input type="hidden" name="pId" value="<%= participant._id %>">
        <div class="flex w-45 bt-white-1 text-center">
            <div class="w-25 p-5-10 br-white-1">
                <label for="Breakfast">
                    <% if (participant._id === attendance.participant && attendance.mDate.aMeal.Breakfast === 'Yes' ) { %>
                        <input type="checkbox" checked value="Yes" onChange=countChecked() name="Breakfast">
                    <% } else { %>
                        <input type="checkbox" value="Yes" onChange=countChecked() name="Breakfast">
                    <% } %>
                 </label>
             </div>
             <div class="w-25 p-5-10 br-white-1">
                 ...
             </div>
         </div>
     </div>
<% })} else { %>
    <div class="bg-theme">
        <h1 class="text-white text-center m-0">No record found!</h1>
    </div>
<% } %>

Answer 1

添加

app.use(express.json()) 

和

app.use(express.urlencoded({extended:false})); 

定义express的位置