Express.js: Kann nicht POST/Benutzerfehler

Question

Ich versuche, den MEAN-Stack zu lernen, indem ich diesem Tutorial folge und ich habe einen Fehler bekommen. Leider kann ich nicht genau herausfinden, wo ich genau gescheitert bin.

Ich habe versucht, Routen in Postman zu testen, indem Sie einen Benutzer erstellen, aber ich bekam immer wieder 'Can not POST/users'.

Kann mir hier jemand helfen? Danke im Voraus!

routes.js

// Dependencies 
var mongoose  = require('mongoose'); 
var User   = require('./model.js'); 

// Opens App Routes 
module.exports = function(app) { 

    // GET Routes 
    // -------------------------------------------------------- 
    // Retrieve records for all users in the db 
    app.get('/users', function(req, res){ 

     // Uses Mongoose schema to run the search (empty conditions) 
     var query = User.find({}); 
     query.exec(function(err, users){ 
      if(err) 
       res.send(err); 

      // If no errors are found, it responds with a JSON of all users 
      res.json(users); 
     }); 
    }); 

    // POST Routes 
    // -------------------------------------------------------- 
    // Provides method for saving new users in the db 
    app.post('/users', function(req, res){ 

     // Creates a new User based on the Mongoose schema and the post bo.dy 
     var newuser = new User(req.body); 

     // New User is saved in the db. 
     newuser.save(function(err){ 
      if(err) 
       res.send(err); 

      // If no errors are found, it responds with a JSON of the new user 
      res.json(req.body); 
     }); 
    }); 
}; 

model.js

// Pulls Mongoose dependency for creating schemas 
var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 

// Creates a User Schema. Defines how user data is stored to db 
var UserSchema = new Schema({ 
    username  : {type: String, required: true}, 
    gender   : {type: String, required: true}, 
    age    : {type: Number, required: true}, 
    favlang   : {type: String, required: true}, 
    location  : {type: [Number], required: true}, //[Long, Lat] 
    htmlverified : String, 
    created_at  : {type: Date, default: Date.now}, 
    updated_at  : {type: Date, default: Date.now} 
}); 

// Sets the created_at parameter equal to the current time 
UserSchema.pre('save', function(next){ 
    now = new Date(); 
    this.updated_at = now; 
    if(!this.created_at){ 
     this.created_at = now 
    } 
    next(); 
}); 

// Indexes this schema in 2dsphere format (critical for running proximity searches) 
UserSchema.index({location: '2dsphere'}); 

// Exports the UserSchema for use elsewhere. Sets the MongoDB collection to be used as: 
module.exports = mongoose.model('scotch-user', UserSchema); 

server.js

// Dependencies 
// ----------------------------------------------------- 
var express   = require('express'); 
var mongoose  = require('mongoose'); 
var port   = process.env.PORT || 3000; 
var morgan   = require('morgan'); 
var bodyParser  = require('body-parser'); 
var methodOverride = require('method-override'); 
var app    = express(); 

// Express Configuration 
// ----------------------------------------------------- 
// Sets the connection to MongoDB 
mongoose.connect("mongodb://localhost/MeanMapApp"); 

// Logging and Parsing 
app.use(express.static(__dirname + '/public'));     // sets the static files location to public 
app.use('/bower_components', express.static(__dirname + '/bower_components')); // Use BowerComponents 
app.use(morgan('dev'));           // log with Morgan 
app.use(bodyParser.json());          // parse application/json 
app.use(bodyParser.urlencoded({extended: true}));    // parse application/x-www-form-urlencoded 
app.use(bodyParser.text());          // allows bodyParser to look at raw text 
app.use(bodyParser.json({ type: 'application/vnd.api+json'})); // parse application/vnd.api+json as json 
app.use(methodOverride()); 

// Routes 
// ------------------------------------------------------ 
require('./app/routes.js')(app); 

// Listen 
// ------------------------------------------------------- 
app.listen(port); 
console.log('App listening on port ' + port); 

Answer 1

Ich glaube, das ist, wo Ihre Fehler.

Statt: module.exports = mongoose.model('scotch-user', UserSchema);

Versuchen: module.exports = mongoose.model('User', UserSchema);

Schauen Sie auch in Express.js für Ihre Routen verwenden. Überprüfen Sie beim Testen auf Postman, ob Sie alle "erforderlichen" Teile für Ihr MongoDB-Schema eingeben.

Answer 2

Ich habe nur Ihre Skripte kopiert und ich habe überhaupt keine Probleme!
Stellen Sie sicher, dass Sie die richtigen Methoden und Routen im Postboten verwenden.
Kleiner Tipp: Mongoose behandelt seine eigenen Schemas, so dass sie nicht exportiert werden müssen.

können Sie einfach die folgenden Schritte aus

app.js

// Dependencies 
// ----------------------------------------------------- 
var express   = require('express'); 
var mongoose  = require('mongoose'); 
var port   = process.env.PORT || 3000; 
var morgan   = require('morgan'); 
var bodyParser  = require('body-parser'); 
var methodOverride = require('method-override'); 
var app    = express(); 

// Load all models 
require('./app/model'); 


// Express Configuration 

model.js

// remove module.exports in the last line 
mongoose.model('User', UserSchema); 

routes.js

// Dependencies 
var mongoose  = require('mongoose'); 
var User   = mongoose.model('User');