如何解决无法读取express js中未定义的属性“名称”？

Question

I'm not able to perform the routing with the parameter, I'm getting the error cant read property 'name' .我无法使用参数执行路由，我收到错误cant read property 'name' 。 I used the template engine twig .我使用了模板引擎twig 。 Here is my template,这是我的模板，

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>{{About}}</title>
</head>
<body>
   <P><h1>{{user}}</h1></P>
   <P><h2>{{text}}</h2></P>
</body>
</html>

this is my main 'js' file-这是我的主要“js”文件-

const express=require('express')
const app=express()

app.use('./static',express.static('twig templet'))
app.set('view engine', 'twig')
app.set('views','./twig templet/views')

app.get('/',(res,req)=>{
    req.render('index',{title:'EXPRESS',gred:'Hello-welcome to Express',mes:'This is twig file'})

})

app.get('/about/:name',(res,req)=>{
    res.render('about',{About:'User',user:req.params.name,text:'This is twig file'})
    console.log('user is:'+ req.params.name)
 
})

app.get('/calculation/:a-:b',(res,req)=>{
    res.render('calculator',
    {About1:'Calculation',
    add:parseInt(req.params.a) + parseInt(req.params.b),
    sub:parseInt(req.params.a) - parseInt(req.params.b),
    mul:parseInt(req.params.a) * parseInt(req.params.b),
    div:parseInt(req.params.a) / parseInt(req.params.b)})


    //console.log('user is:'+ res.params.Name)

})

app.listen(5000,()=>{
    console.log("server is running at 5000")
})

Answer 1

You have the callback values from the app.get() in the wrong order, it should be like this, you can omit the next though,你有来自 app.get() 的回调值顺序错误，应该是这样的，你可以省略next ，

app.get('/about/:name',(req, res, next) => {}

That's it.就是这样。

如何解决无法读取express js中未定义的属性“名称”？

问题描述

1 个解决方案

解决方案1
0 2020-11-07 05:33:24

如何解决无法读取express js中未定义的属性“名称”？

问题描述

1 个解决方案

解决方案1 0 2020-11-07 05:33:24

解决方案1
0 2020-11-07 05:33:24