javascript - req.body 使用 MEAN Express 4.x 和 Node.js 未定义

Question

我完全是个菜鸟，希望培养 MEAN 堆栈技能。我有一个基本的 Node 设置，基本的 GET 路由工作正常，但 POST 和 DELETE 没有将数据传递给 mongo。

我已经调试过 req.body 是未定义的，但我不知道为什么 - 我已经:

检查我使用的是 bodyParser路由在配置之后声明

这是代码 app.js:

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var app = express();

var routes = require('./routes/index');
var todos = require('./routes/todos');

// set our port
var port = process.env.PORT || 3000; 

//Requires the mongoose connection 
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/todoApp', function(err) {
    if(err) {
        console.log('connection error', err);
    } else {
        console.log('connection successful');
    }
});

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/todos', todos);
app.use('/', routes);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});

// start app ===============================================
// startup our app at http://localhost:3080
app.listen(port);               

// shoutout to the user                     
console.log('Magic happens on port ' + port);

module.exports = app;

路线:

var express = require('express');
var router = express.Router();

var mongoose = require('mongoose');
var Todo = require('../models/Todo.js');

/* GET /todos listing. - THIS GUY IS WORKING OK */
router.get('/', function(req, res, next) {
  Todo.find(function (err, todos) {
    if (err) return next(err);
    res.json(todos);
  });
});

/* POST /todos listings */
router.post('/', function(req, res, next){
    console.log(req.body); // THIS GUY IS UNDEFINED

Todo.create(req.query, function(err, post){
    if (err) return next(err);
    res.json(post);
    });
});

module.exports = router

和架构/模型

var mongoose = require('mongoose');

var TodoSchema = new mongoose.Schema({
  name: String,
  completed: Boolean,
  note: String,
  updated_at: { type: Date, default: Date.now },
});
//note the declaration of the collection as the third argument to the model method

module.exports = mongoose.model('Todo', TodoSchema, 'todoApp');

请帮忙!!

Answer 1

当您对路由执行 POST 时，您需要将内容类型 header 指定为 application/json。

POST -H Content-type: 'application/json' /post/route

你用什么来测试你的 POST？