使用Pug和ExpressJS渲染列表时出错

时间:2018-11-15 02:42:44

标签: node.js express pug

你好,我对Node,Expression和Pug还是陌生的,我正在尝试将对象渲染到视图中,但是我收到一个Pug错误,或者至少我认为这是Pug错误。我正在使用pugcli,当它尝试呈现html时出现错误。

pugcli错误在终端上显示为:

无法读取未定义的属性“长度”

这很奇怪,因为即使pug cli显示错误,当我尝试在浏览器中查看它时,浏览器也会显示一个列表,但所有<li>元素都为空。

我希望bin/www public javascripts stylesheets routes index.js views index.pug layout.pug ... app.js 显示对象的ID,名称和年龄

我知道在pug中,为了渲染对象,您必须使用某种for循环遍历该对象。我已经在pug文件中编写了该文件,但是对象未渲染。

如果我在代码中缺少什么,或者如果我完全弄乱了代码,我将不胜感激?

我的设置如下

extends layout
block content
  h1= title
  p Welcome to #{appHeading}
  div
    ul
      for user, i in users
        li= users.name +" - "+ users.id
      li=number

我的index.pug是:

var express = require('express');
var router = express.Router();
var users = [
  {
    id: 0,
    name: 'Glenn',
    age: 40
  },
  {
    id: 1,
    name: 'Jeff',
    age: 37
  },
  {
    id: 2,
    name: 'Sara',
    age: 22
  },
  {
    id: 3,
    name: 'Bill',
    age: 41
  },
  {
    id: 4,
    name: 'Mary',
    age: 29
  },

];
var appHeading = 'my object render app ' 
var number = 42;
/* GET home page. */
router.get('/', function(req, res, next) {

  //res.json(users);
  //res.send('Is this working?')
  res.render('index', { 
    title: 'This is my app to render objects in pug',
    users,
    number,
    appHeading
  });
});
module.exports = router;

这是我的index.js:

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

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

const app = express();

/*const logging = function(req, res, next){
  console.log('Logging....')
  next();
}
*/
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

app.use(logger('dev'));
//Body Parser middleware
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended : false}));
//app.use(express.json());
//app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
//app.use(logging);
app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});


app.listen(port=3000 , function(){
  console.log('Server started on port '+ port);
})
module.exports = app;

我的app.js是:

{{1}}

1 个答案:

答案 0 :(得分:0)

似乎毕竟是错字:

extends layout
block content
  h1= title
  p Welcome to #{appHeading}
  div
    ul
      for user, i in users
        li= user.name +" - "+ user.id
      li=number

这将起作用。发生的事情是您正在访问users(数组)而不是user(迭代对象)。我已经在机器上尝试过该代码,并且可以正常工作。