TypeError: db.la collecte n'est pas une fonction, NE peut pas OBTENIR
je vais essayer d'obtenir certaines données de la apiRoutes.get('/resources/productinfo/:name') et j'ai cette erreur, je ne sais pas ce qui se passe mal... aussi le apiRoutes.get('/book/:title') ne semble fonctionner! je ne sais pas ce que je fais mal
Mise à JOUR:
> TypeError: Cannot read property 'findOne' of undefined <br> at Object.module.exports.findBookByTitle
> (/home/themis/firstapp/api/config/database.js:22:26) <br>
> at /home/themis/firstapp/api/server.js:109:22 <br>
> at Layer.handle [as handle_request]
> (/home/themis/firstapp/api/node_modules/express/lib/router/layer.js:82:5)
> <br> at next
> (/home/themis/firstapp/api/node_modules/express/lib/router/route.js:100:13)
> <br> at Route.dispatch
> (/home/themis/firstapp/api/node_modules/express/lib/router/route.js:81:3)
> <br> at Layer.handle [as handle_request]
> (/home/themis/firstapp/api/node_modules/express/lib/router/layer.js:82:5)
> <br> at
> /home/themis/firstapp/api/node_modules/express/lib/router/index.js:234:24
> <br> at param
> (/home/themis/firstapp/api/node_modules/express/lib/router/index.js:331:14)
> <br> at param
> (/home/themis/firstapp/api/node_modules/express/lib/router/index.js:347:14)
> <br> at Function.proto.process_params
> (/home/themis/firstapp/api/node_modules/express/lib/router/index.js:391:3)
> <br> at
> /home/themis/firstapp/api/node_modules/express/lib/router/index.js:228:12
> <br> at Function.match_layer
> (/home/themis/firstapp/api/node_modules/express/lib/router/index.js:295:3)
> <br> at next
> (/home/themis/firstapp/api/node_modules/express/lib/router/index.js:189:10)
> <br> at
> /home/themis/firstapp/api/node_modules/express/lib/router/index.js:191:16
> <br> at Function.match_layer
> (/home/themis/firstapp/api/node_modules/express/lib/router/index.js:295:3)
> <br> at next
> (/home/themis/firstapp/api/node_modules/express/lib/router/index.js:189:10)ici est la server.js
var express = require('express');
MongoClient = require('mongodb').MongoClient,
app = express(),
mongoUrl = 'mongodb://localhost:27017/firstapp';
var bodyParser = require('body-parser');
var morgan = require('morgan');
var mongoose = require('mongoose');
var passport = require('passport');
var redisClient = require('redis').createClient;
var redis = redisClient(6379, 'localhost');
var config = require('./config/database'); //get db config file
var User = require('./app/models/user'); //get the mongoose model
var Products = require('./app/models/products'); //get the mongoose model
var Makeissue = require('./app/models/makeissue'); //get the mongoose model
var port = process.env.PORT || 8080;
var jwt = require('jwt-simple');
var access = require('./config/database.js');
MongoClient.connect(mongoUrl, function(err, db) {
if (err) throw 'Error connecting to database - ' + err;
//get our request parameters
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
//log to console
app.use(morgan('dev'));
//Use the passport package in our application
app.use(passport.initialize());
//demo Route (GET http://localhost:8080)
app.get('/', function(req, res) {
res.send('The API is at http://localhost:' + port + '/api');
});
//connect to database
mongoose.connect(config.database);
//pass passport for configuration
require('./config/passport')(passport);
//bundle our routes
var apiRoutes = express.Router();
//create a new user account (POST http://localhost:8080/api/signup)
apiRoutes.post('/signup', function(req, res) {
if (!req.body.name || !req.body.password || !req.body.email) {
res.json({success: false, msg: 'Please pass name and password and email.'});
} else {
var newUser = new User({
name: req.body.name,
password: req.body.password,
email: req.body.email
});
//save the user
newUser.save(function(err) {
if (err) {
return res.json({success: false, msg: 'Username already exists.'});
}
res.json({success: true, msg: 'Successful created new user.'});
});
}
});
//route to authenticate a user (POST http://localhost:8080/api/authenticate)
apiRoutes.post('/authenticate', function(req, res) {
User.findOne({
name: req.body.name
}, function(err, user) {
if (err) throw err;
if (!user) {
res.send({success: false, msg: 'Authentication failed. User not found.'});
} else {
//check if password matches
user.comparePassword(req.body.password, function (err, isMatch) {
if (isMatch && !err) {
//if user is found and password is right create a token
var token = jwt.encode(user, config.secret);
//return the information including token as JSON
res.json({success: true, token: 'JWT ' + token});
} else {
res.send({success: false, msg: 'Authentication failed. Wrong password.'});
}
});
}
});
});
apiRoutes.post('/book', function (req, res) {
if (!req.body.title || !req.body.author) res.status(400).send("Please send a title and an author for the book");
else if (!req.body.text) res.status(400).send("Please send some text for the book");
else {
access.saveBook(db, req.body.title, req.body.author, req.body.text, function (err) {
if (err) res.status(500).send("Server error");
else res.status(201).send("Saved");
});
}
});
apiRoutes.get('/book/:title', function (req, res) {
if (!req.param('title')) res.status(400).send("Please send a proper title");
else {
access.findBookByTitle(db, req.param('title'), function (book) {
if (!req.body.text) res.status(500).send("Server error");
else res.status(200).send(book);
});
}
});
apiRoutes.get('/productinfo' , function(req, res, next) {
Products.find( function (err, result) {
if (err) return console.error(err);
res.json(result);
});
});
apiRoutes.get('/resources/productinfo/:name' , function(req, res) {
if (!req.param('name')) res.status(400).send("Please send a proper name");
else{
access.findProductsByName(Products, req.param('name'), function(Products) {
if (!products) res.status(500).send("server error");
});
}
});
//create a new Product (POST http://localhost:8080/api/productsignup)
apiRoutes.post('/resources/productsignup', function(req, res) {
if (!req.body.name || !req.body.serialnumber) {
res.json({success: false, msg: 'Please pass name and serial number.'});
} else {
var newProducts = new Products({
name: req.body.name,
serialnumber: req.body.serialnumber
});
//save the Product
newProducts.save(function(err) {
if (err) {
return res.json({success: false, msg: 'Product already exists.'});
}
res.json({success: true, msg: 'Successful created new Product.'});
});
}
});
apiRoutes.post('/resources/createpost', function(req, res) {
if (!req.body.issue) {
res.json({success: false, msg: 'Please pass a issue.'});
} else {
var newMakeissue = new Makeissue({
issue: req.body.issue
});
//save the Product
newMakeissue.save(function(err) {
if (err) {
return res.json({success: false, msg: 'Post already exists.'});
}
res.json({success: true, msg: 'Successful created new post.'});
});
}
});
//route to a restricted info (GET http://localhost:8080/api/memberinfo)
apiRoutes.get('/memberinfo', passport.authenticate('jwt', { session: false}), function(req, res) {
var token = getToken(req.headers);
if (token) {
var decoded = jwt.decode(token, config.secret);
User.findOne({
name: decoded.name
}, function(err, user) {
if (err) throw err;
if (!user) {
return res.status(403).send({success: false, msg: 'Authentication failed. User not found.'});
} else {
res.json({success: true, msg: 'Welcome in the member area ' + user.name + '!'});
}
});
} else {
return res.status(403).send({success: false, msg: 'No token provided.'});
}
});
getToken = function (headers) {
if (headers && headers.authorization) {
var parted = headers.authorization.split(' ');
if (parted.length === 2) {
return parted[1];
} else {
return null;
}
} else {
return null;
}
};
//connect the api routes under /api/*
app.use('/api', apiRoutes);
module.exports = apiRoutes;
app.listen(8080, function() {
console.log('listening on port 8080');
});
});et la database.js
module.exports = {
'secret': 'di.ionio.gr',
'database': 'mongodb://localhost/firstapp'
};
module.exports.saveBook = function (db, title, author, text, callback) {
db.collection['text'].save({
title: title,
author: author,
text: text
}, callback);
};
module.exports.findBookByTitle = function (db, title, callback) {
db.collection['text'].findOne({
title: title
}, function (err, doc) {
if (err || !doc) callback(null);
else callback(doc.text);
});
};
module.exports.findProductsByName = function (db, name, callback) {
db.collection['products'].findOne({
name: name
}, function (err, doc) {
if (err || !doc) callback(null);
else callback(doc.products);
});
};et de l'emballage.json
{
"name": "firstapp",
"main": "server.js",
"dependencies": {
"bcrypt": "^0.8.5",
"body-parser": "~1.9.2",
"express": "~4.9.8",
"jwt-simple": "^0.3.1",
"mongoose": "~4.2.4",
"mongodb" : "~1.2.5",
"morgan": "~1.5.0",
"passport": "^0.3.0",
"passport-jwt": "^1.2.1",
"redis": "~0.10.1"
}
}
Ajouter un nouveau journal des erreurs, pls
mis à jour le post
j'ai mis à jour ma réponse
Le codage d'un serveur nodejs est une vilaine tâche
mis à jour le post
j'ai mis à jour ma réponse
Le codage d'un serveur nodejs est une vilaine tâche
OriginalL'auteur Themistoklis Bogiatzoglou | 2016-01-16
Vous devez vous connecter pour publier un commentaire.
incorect syntaxe, vous devez lire la propriété de db.collection, mais vous l'appelez. Exemple:
Par exemple
var objet = {
'some_value': 'valeur',
'some_methid': function(){ return 'méthode'}
}
Vous pouvez lire et définir la propriété "some_value', par exemple:
//ÉTAPE 2
Ok, dans vos méthodes de database.js vous passez db variable, mais ce n'est pas de db d'instance, c'est la mangouste modèle, et vous devez écrire comme ceci:
Vous devez replate db.collection (les "produits") à la db.collection['products'] ou db.collection.produits. Lorsque vous utilisez db.collection (les "produits") vous appelez de la collection, mais la collecte n'est pas une fonction!
écrire à la question, nous ne pouvons pas essayer de résoudre ensemble
ok! je vais le poster à la question, mais le résultat est le suivant : TypeError: Cannot read property 'findOne' undefined BTW ty pour votre aide
Sera mieux si vous mettez à jour votre question-post avec plein d'erreur
OriginalL'auteur siavolt
Vous ne pouvez déclarer module.les exportations fois dans un fichier, de sorte que vous devrait changer:
Dans votre database.js fichier:
à
et ainsi de suite
Prendre un coup d'oeil à ceci: https://www.sitepoint.com/understanding-module-exports-exports-node-js/
OriginalL'auteur Jordi Flores
dans le paquet.json dossier trouver mongodb à l'intérieur de dépendances et de mise à jour avec ces valeur:
Puis Exécutez
de nouveau. Qui permettra de résoudre votre problème.
OriginalL'auteur SUBHASIS MONDAL