Question

我在node.js中的注册表单中发帖时遇到麻烦。每次将表单发布到正文时，请求都有信息，但是正文为空。我是node和表达的新手，所以它可能很小，但我一生都无法解决。

这是我在ejs中的表格：

<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' });
});

以下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
不同路线
从头开始编写更简单的表单
可模仿而不是身体分析器

我现在很确定这是ejs表单的问题，因为请求中的body对象始终为空。

Answer 1

表单中的<input>元素必须具有name属性，而不仅仅是id。

Answer 2

另一个答案指出了您所缺少的内容，我更新了.ejs代码以向您显示发布html表单的正确方法：

<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" name="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" name="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" name="confirmPassword" class="form-control" id="confirmPassword" placeholder="Re-enter Password">
  </div>
  <button class="btn btn-dark mt-3" type="submit">Submit</button>
</form>

如果您要提交更复杂的表单或需要对字段进行某种验证，则可以执行上述操作或使用javascript / jquery处理提交。

查看此答案：Submit a form using jQuery

Answer 3

使用express时的另一个常见错误，请确保使用boyParser aria-hidden

i.e

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

3 个答案: