TypeError：无法读取未定义的属性（ExpressJS / POST）

Question

我看过所有类似的问题，但没有一个对我有用。我有一个节点js应用程序，其中无法使用body-parser从表单打印输入文本。

我的index.ejs：

         <form id="demo-2" method = "POST" action="/search">
<input type="search" name = "searcher" placeholder="Search">
                    </form>

Index.js：

var cool = require('cool-ascii-faces');
var express = require('express');

var app = express();
var pg = require('pg');
var bodyParser = require('body-parser');
var env = require('node-env-file');

app.set('port', (process.env.PORT || 5000));
app.use(express.static(__dirname + '/views/'));

// views is directory for all template files
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');

//app.use(express.bodyParser());


//DIFFERENT APPS - tells them what to do

app.post('/search', function(request, response) {
    //var username = req.body;

    console.log("posted something"+ request.body.searcher);
    response.end("something was posted: "+ request.body.searcher);
});

app.get('/search', function(request, response) {
     response.send("skylarr");

});

尽管使用了输入的名称搜索器，但还是出现了错误： TypeError: Cannot read property 'searcher' of undefined

怎么了

Answer 1

body-parser不是快递的一部分。使用单独安装它npm install body-parser --save ，然后将其用作中间件。在注释express.bodyParser()中间件的行后检查代码

var cool = require('cool-ascii-faces');
var express = require('express');

var app = express();
var pg = require('pg');
var bodyParser = require('body-parser');
var env = require('node-env-file');

app.set('port', (process.env.PORT || 5000));
app.use(express.static(__dirname + '/views/'));

// views is directory for all template files
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');

//app.use(express.bodyParser());

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


//DIFFERENT APPS - tells them what to do

app.post('/search', function(request, response) {
    //var username = req.body;

    console.log("posted something"+ request.body.searcher);
    response.end("something was posted: "+ request.body.searcher);
});

app.get('/search', function(request, response) {
     response.send("skylarr");

});