AJAX post在集合中创建一个新条目,但不发送实际数据

时间:2015-12-30 23:00:13

标签: javascript ajax mongodb

以下是console.log(payload)的数据示例:

  

对象{title:“test post”,消息:“some message”,image:“cat.jpg”}

然而,这是我的mongo系列中出现的内容:

{
    "_id": "5684609f8d6ff91e159cef6d",
    "created_at": "2015-12-30T22:54:23.266Z",
    "updated_at": "2015-12-30T22:54:23.266Z",
    "__v": 0
  }

以下是代码:

console.log(payload); // what this returns is posted above!
var request = new XMLHttpRequest();
        request.open('POST', 'http://localhost:3000/api/v1/posts', true);
        request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        request.send(payload);

有人能帮助我吗?

以下是来自server.js的相关代码:

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/fluxible-posts');

var Post = require('./database/postModel');


// routes
var router = express.Router();
server.use('/api/v1/', router); 

router.use(function(req, res, next) {
    // do logging
    console.log('Something is happening.');
    next(); // make sure we go to the next routes and don't stop here
});

// test route 
router.get('/', function(req, res) {
    res.json({ message: 'hooray! welcome to our api!' });   
});

router.route('/posts')
    .post(function(req,res) {
        var post = new Post();
        post.title = req.body.title;
        post.message = req.body.message;
        post.image = req.body.image;

        post.save(function(err) {
            if(err) {
                res.send(err);
            }
            res.json({ message : 'New post created' });
        });
    })
    .get(function(req, res) {
        Post.find(function(err, posts) {
            if (err)
                res.send(err);

            res.json(posts);
        });
    });

router.route('/posts/:post_id')

    // get the post with that id
    .get(function(req, res) {
        Post.findById(req.params.post_id, function(err, post) {
            if (err)
                res.send(err);
            res.json(post);
        });
    })

    // update the post with this id
    .put(function(req, res) {
        Post.findById(req.params.post_id, function(err, post) {

            if (err)
                res.send(err);

            post.name = req.body.name;
            post.save(function(err) {
                if (err)
                    res.send(err);

                res.json({ message: 'Post updated!' });
            });

        });
    })

    // delete the post with this id
    .delete(function(req, res) {
        Post.remove({
            _id: req.params.post_id
        }, function(err, post) {
            if (err)
                res.send(err);

            res.json({ message: 'Successfully deleted' });
        });
    });

2 个答案:

答案 0 :(得分:1)

如果您添加request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');,您应该发送不在对象中的有效负载,但是作为POST数据字符串,如

title=test%20post&message=some%20message&image=cat.jpg

您可以使用Query-string encoding of a Javascript Object

中的序列化功能

<强>更新

正如我所见,您没有将POST数据解析器中间件添加到路由器中,因此您的req.body未定义。对于Content-Type: application/x-www-form-urlencoded,您应该使用body-parser模块。

您可以使用npm install body-parser进行安装,并将服务器代码更改为

var bodyParser = require('body-parser');

var router = express.Router();
router.use(bodyParser.urlencoded({ extended: true }));

server.use('/api/v1/', router); 

我的评论的第一部分仍然有效。

更新2:

或者,您可以使用Content-type: application/json。在这种情况下,您需要更新您的客户端代码,如下所示:

var payload = {test: "data"}
var request = new XMLHttpRequest(); 
request.open('POST', 'http://localhost:3005/api/v1/posts', true); 
request.setRequestHeader('Content-Type', 'application/json'); 
request.send(JSON.stringify(payload));

服务器端:

var bodyParser = require('body-parser');

var router = express.Router();
router.use(bodyParser.json());

server.use('/api/v1/', router);

答案 1 :(得分:1)

尝试以下代码

var request = new XMLHttpRequest();

xhttp.onreadystatechange = function() {
    if (request.readyState == 4 && request.status == 200) {
        console.log("success : " + request.responseText);
    } else {
        //This would print if something goes wrong along with the error message
        console.log("other status : " + request.status + " : " + request.responseText);
    }
};

request.open('POST', 'http://localhost:3000/api/v1/posts', true);
request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
//We need to serialize payload before sending it
request.send(JSON.stringify(payload));

您可以使用开发者工具下的Chrome网络标签来监控发送的网络请求。在那里,您将能够看到请求的主体是否已发送,或者标头是否已按设置发送以及响应是什么。

请参阅下面的图片

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