MEAN Stack，MongoDB 记录创建不起作用

Question

我正在开发一个 MEAN 堆栈应用程序。我正在尝试从表单中简单地在 MongoDB 中创建一条记录。我已经在调试器中验证了数据绑定在视图和控制器之间工作。在服务器端控制器代码中，在尝试保存记录之前检查 req.body 会返回“未定义”（参见下面的代码）。在 Angular 控制器中，我检查了在执行 notice.$save 函数时回调中的“结果”值，它显示了要填充的标题和详细信息值。但是，数据没有保存到数据库中，我收到以下错误：

{ [ValidationError: Announcement validation failed]
  message: 'Announcement validation failed',
  name: 'ValidationError',
  errors:
   { details:
      { [ValidatorError: Path `details` is required.]
        properties: [Object],
        message: 'Path `details` is required.',
        name: 'ValidatorError',
        kind: 'required',
        path: 'details',
        value: undefined },
     heading:
      { [ValidatorError: Path `heading` is required.]
        properties: [Object],
        message: 'Path `heading` is required.',
        name: 'ValidatorError',
        kind: 'required',
        path: 'heading',
        value: undefined } } }

我错过了什么？这是我的代码：

我的html文件中的表单：

  <form ng-submit="AnnouncementsVm.createAnnouncement()">
    <fieldset class="form-group">
      <label for="heading">Heading:</label>
      <textarea class="form-control" id="heading" rows="1"
        ng-model="AnnouncementsVm.announcementHeading"></textarea>
    </fieldset>
    <fieldset class="form-group">
      <label for="details">Details:</label>
      <textarea class="form-control" id="details" rows="3"
        ng-model="AnnouncementsVm.announcementDetails"></textarea>
    </fieldset>

    <p><input type="submit" value="Submit →"><p>
  </form>

此页面部分的角度路径定义为：

  $routeProvider.
    when('/announcements', {
      templateUrl: '/views/partials/announcements.html',
      controller: 'Announcements.Controller',
      controllerAs: 'AnnouncementsVm'
    });

这是我的控制器代码：

angular.module('app').
  controller('Announcements.Controller', AnnouncementsCtrl);

function AnnouncementsCtrl($log, $resource) {
  $log.debug('Executing AnnouncementsCtrl');
  var vm = this;
  var Announcement = $resource('/api/announcements');

  Announcement.query( function(results) {
    vm.announcements = results;
  });

  vm.announcements = [];

  vm.createAnnouncement = function() {
    var announcement = new Announcement({
      heading: vm.announcementHeading,
      details: vm.announcementDetails
    });
    announcement.$save( function(result) {
      vm.announcements.push(result);
      vm.announcementHeading = '';
      vm.announcementDetails = '';
    });
  };
}

REST API 路由定义为：

app.post('/api/announcements', announcementsController.create);

服务器端控制器（announcements-controller.js）：

'use strict';

var Announcement = require('../models/Announcement.js');

module.exports.create = function(req, res) {
  var announcement = new Announcement(req.body);
  console.log(req.body); // returns "undefined"
  announcement.save( function(err, result) {
    if (err) console.log(err);
    console.log('Save Announcement Result: ' + result);
    res.json(result);
  });
};

module.exports.list = function(req, res) {
  Announcement.find({}, function (err, results) {
    if (err) throw err;
    res.json(results);
  });
};

最后，我正在使用这个 Mongoose 模型 (Announcements.js)

'use strict';

var mongoose = require('mongoose');

var AnnouncementSchema = new mongoose.Schema({
  heading: {type: String, required: true},
  details: {type: String, required: true},
  image: {type: String, required: false}
});

module.exports = mongoose.model('Announcement', AnnouncementSchema);

Answer 1

如何在 Angular 中配置您的路由？您是否将控制器作为“AnnouncementsVm”传递？

您是否尝试过从控制器访问 ng-models 的announcementHeading 和announcementDetails 的值？

试着放

vm.createAnnouncement = function() {
 $log.log(vm.announcementHeading);
 $log.log(vm.announcementDetails);

});

};

并检查您是否得到正确的值

Answer 2

问题解决了。我没有为路由集成 body-parser，所以请求没有被正确填充。这是更新后的 ExpressJS 路由：

'use strict';

var bodyParser = require('body-parser');
var path = require('path');
var announcementsController = require('../controllers/announcements-controller.js');

module.exports = function(app) {

  // create application/json parser
  var jsonParser = bodyParser.json();

  // create application/x-www-form-urlencoded parser
  var urlencodedParser = bodyParser.urlencoded({ extended: false });

  app.get('/', function(req, res) {
    res.sendFile(path.join(__dirname, '../../client/views/index.html'));
  });

  // REST API
  app.get('/api/announcements', announcementsController.list);
  app.post('/api/announcements', jsonParser, announcementsController.create);
};