404在Thinkster MEAN堆棧教程

Question

API調用我建設使用意味着reddit的式的Web應用程序如下this Thinkster tutorial。

教程指示使用curl創建一個新的職位。

C:\root>curl --data "title=test&link=http://test.com" http://localhost:3000/posts

不過，我得到這個錯誤響應：

<h1>Not Found</h1> 
<h2>404</h2> 
<pre>Error: Not Found 
    at C:\root\app.js:30:13 
    at Layer.handle [as handle_request] (C:\root\node_modules\express\lib\router\layer.js:95:5) 
    at trim_prefix (C:\root\node_modules\express\lib\router\index.js:312:13) 
    at C:\root\node_modules\express\lib\router\index.js:280:7 
    at Function.process_params (C:\root\node_modules\express\lib\router\index.js:330:12) 
    at next (C:\root\node_modules\express\lib\router\index.js:271:10) 
    at C:\root\node_modules\express\lib\router\index.js:618:15 
    at next (C:\root\node_modules\express\lib\router\index.js:256:14) 
    at Function.handle (C:\root\node_modules\express\lib\router\index.js:176:3) 
    at router (C:\root\node_modules\express\lib\router\index.js:46:12)</pre> 

我從這些文件看，但所有的引用都只是帶我發生了什麼錯誤.. 。

這是部分代碼

個

/routes/index.js：

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

/* GET home page. */ 
router.get('/', function(req, res, next) { 
    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); 
    }) 
}) 

/models/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); 

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

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(path.join(__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('/', index); 
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 handler 
app.use(function(err, req, res, next) { 
    // set locals, only providing error in development 
    res.locals.message = err.message; 
    res.locals.error = req.app.get('env') === 'development' ? err : {}; 

    // render the error page 
    res.status(err.status || 500); 
    res.render('error'); 
}); 

module.exports = app; 

var mongoose = require('mongoose'); 
require('./models/Posts'); 
require('./models/Comments'); 

mongoose.connect('mongod:localhost/news'); 

我覺得我所做的一切是正確的，除了我不確定將其他路線放在路線索引文件中的位置，以及類似的app.js。但是這對我來說似乎可以忽略不計。我進行了所有我能想到的調試，但都卡住了。

還應當指出的是，本教程可能不適合在Windows機器上使用。我必須安裝curl並做一些其他的事情，這些事情在Linux或Mac上可能不是必需的。我正在使用Windows 10.

Answer 1

您的module.exports在中過早地被調用routes/index.js。將module.exports = router;移至文件底部，回收您的服務，然後重試。

還有一些與app.js問題。請看下圖：

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'); 

// Notice the differences starting here 
var app = express(); 

var mongoose = require('mongoose'); 

// connect MongoDB 
mongoose.connect('mongodb://localhost/news', function(err,db){ 
    if (!err){ 
     console.log('Connected to /news!'); 
    } else{ 
     console.dir(err); //failed to connect 
    } 
}); 

require('./models/Posts'); 
require('./models/Comments'); 

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

// 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(path.join(__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('/', index); 
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 handler 
app.use(function(err, req, res, next) { 
    // set locals, only providing error in development 
    res.locals.message = err.message; 
    res.locals.error = req.app.get('env') === 'development' ? err : {}; 

    // render the error page 
    res.status(err.status || 500); 
    res.render('error'); 
}); 


module.exports = app; 

路線/ index.js：

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

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

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

     res.json(post); 
    }) 
}) 

module.exports = router;