javascript - AngularJS 架构尚未注册型号 'Post'

Question

我正在尝试学习一点 MEAN 堆栈，并开始在 thinkster.io 上进行教程。 ，我已经到了需要使用服务器端的部分，老实说，我在一些概念上还遇到很多困难，其中一些我正在理解，但大多数我仍然有点迷失。所以我请求你们的帮助。

第一个文件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 routes = require('./routes/index');
var users = require('./routes/users');

var mongoose = require('mongoose');

mongoose.connect('mongodb://localhost/news');
require('./models/Posts');
require('./models/Comments');

var app = express();

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

// 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: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/users', users);

// 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: {}
    });
});


module.exports = app;

第二个文件:Index.js

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

/* GET home page. */
router.get('/', function(req, res) {
  res.render('index', { title: 'Express' });
});

module.exports = router;

var mongoose = require('mongoose');
var Post = mongoose.model('Post');
var Comment = mongoose.model('Comment');

router.get('/posts', function(req, res, next) {
  Post.find(function(err, posts){
    if(err){ return next(err); }

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

router.post('/posts', function(req, res, next){
    var post = new Post(req.body);
    post.save(function(err, post){
        if(err){return next(err);}

        res.json(post);
    });
});

第三个文件，我在其中创建了帖子和评论的模型:

Posts.js:

var mongoose = require('mongoose');

var PostSchema = new mongoose.Schema({
  title: String,
  link: String,
  upvotes: {type: Number, default: 0},
  comments: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Comment' }]
});

mongoose.model('Post', PostSchema);

评论.js:

var mongoose = require('mongoose');

var CommentSchema = new mongoose.Schema({
  body: String,
  author: String,
  upvotes: {type: Number, default: 0},
  post: { type: mongoose.Schema.Types.ObjectId, ref: 'Post' }
});

mongoose.model('Comment', CommentSchema);

当我执行 npm start 来运行网络时，它给出了架构尚未为模型“Post”注册的错误。你能帮助我吗？预先感谢您!

Answer 1

查看app.js文件中require的顺序，一定要有

require('./models/Posts');

行前

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

您需要它们的地方。