表单 POST 请求正文为空 - Node.js / express / ejs / body-parser

Question

我在使用 Node.js 中的注册表单发布帖子时遇到问题。每次发布表单时，请求的正文都有信息，但正文是空的。我对节点和表达很陌生，所以这可能是小事，但我一生都无法弄清楚。

这是我在 ejs 中的表单：

<form class="form-signin" method="post" action="/users/register">
  <div class="form-group">
    <label class="sr-only" for="email">Email address</label>
    <input type="email" class="form-control" id="email" placeholder="Enter Email" autocomplete="off">
  </div>
  <div class="form-group">
    <label class="sr-only" for="password">Password</label>
    <input type="password" class="form-control" id="password" placeholder="Enter Password">
  </div>
  <div class="form-group">
    <label class="sr-only" for="confirmPassword">Confirm Password</label>
    <input type="password" class="form-control" id="confirmPassword" placeholder="Re-enter Password">
  </div>
  <button class="btn btn-dark mt-3" type="submit">Submit</button>
</form>

这是我在用户路由器中的路由器代码：

router.post('/register', function(request, response, next) {
  console.log(request);
  console.log(request.body)
  response.render('register', { 'title': 'Register' });
});

这是控制台上的相关输出：

console.log(request); output shortened this is just the tail.      
  _startAt: [ 299545, 483820242 ],
  _startTime: 2018-09-20T16:08:59.366Z,
  _remoteAddress: '::1',
  body: {},
  _body: true,
  length: undefined,
  read: [Function],
  secret: undefined,
  cookies: {},
  signedCookies: {},
  route:
   Route {
     path: '/register',
     stack: [ [Object] ],
     methods: { post: true } } }
{}
POST /users/register 200 21.906 ms - 2361

app.js代码：

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var bodyParser = require('body-parser');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var app = express();

app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

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

app.use('/', indexRouter);
app.use('/users', usersRouter);

app.use(function(request, response, next) {
  next(createError(404));
});

app.use(function(error, request, response, next) {
  response.locals.message = error.message;
  response.locals.error = request.app.get('env') === 'development' ? error : {};
  response.status(error.status || 500);
  response.render('error');
});

module.exports = app;

我尝试过的事情：

• 不同的浏览器
• 不同的路线
• 从头开始编写更简单的形式
• 强大而不是 body-parser

此时我非常确定这是 ejs 表单的问题，因为请求中的主体对象始终为空。

Answer 1

<input>表单中的元素必须定义一个属性name，而不仅仅是id.