Receiving a Cannot POST error when attempting to post data in a rest client
Question
I am receiving this error when attempting to post a new entry into a database I have created, called Doctors.
My server.js looks like this:
const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const app = express();
const router = express.Router();
const MongoClient = require('mongodb').MongoClient;
const client = new MongoClient(uri, { useNewUrlParser: true });
const morgan = require('morgan');
var Doctor = require('./www/js/user.js');
app.use(bodyParser.json());
app.use(express.static('www'));
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({ 'extended': 'true' }));
app.use(bodyParser.json());
const mongoURL = 'mongodb://localhost:27017/app';
mongoose.connect(mongoURL, function (err) {
if (err) {
console.log('Not connected to the database:' + err);
} else {
console.log('Successfully connected to MongoDB');
}
});
app.post('/doctors', function (req, res) {
var doctor = new Doctor();
doctor.doctorID = req.body.doctorID;
doctor.password = req.body.password;
doctor.save();
res.send('doctor created');
});
// Configure port
const port = process.env.PORT || 8080;
// Listen to port
app.listen(port);
console.log(`Server is running on port: ${port}`);
app.get('*', function (req, res) {
res.sendfile('./www/index.html');
});
My user.js, which is my schema, looks like this:
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var bcrypt = require('bcrypt-nodejs');
var DoctorSchema = new Schema({
doctorID: {type: Number, required: true, unique: true},
password: {type: String, required: true}
});
//encrypt password
DoctorSchema.pre('save', function(next){
var doctor = this;
bcrypt.hash(doctor.password, null, null, function(err, hash){
if (err) return next(err);
doctor.password = hash;
next();
});
})
module.exports = mongoose.model('Doctor', DoctorSchema);
When attempting to post, I get this error.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>Cannot POST /doctors</pre>
</body>
</html>
I don't understand why I'm getting this particular error. I can get data from /doctors with no issues, I just can't post to it.
5 answers
solution1
0 2019-12-10 15:05:07
Please change your server.js to this:
const express = require('express');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
const app = express();
const MongoClient = require('mongodb').MongoClient;
const client = new MongoClient(uri, { useNewUrlParser: true });
const morgan = require('morgan');
var Doctor = require('./www/js/user.js');
app.use(bodyParser.json());
app.use(express.static('www'));
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({ 'extended': 'true' }));
app.use(bodyParser.json());
const mongoURL = 'mongodb://localhost:27017/app';
mongoose.connect(mongoURL, function (err) {
if (err) {
console.log('Not connected to the database:' + err);
} else {
console.log('Successfully connected to MongoDB');
}
});
app.post('/doctors', function (req, res) {
var doctor = new Doctor();
doctor.doctorID = req.body.doctorID;
doctor.password = req.body.password;
doctor.save();
res.send('doctor created');
});
// Configure port
const port = process.env.PORT || 8080;
app.get('*', function (req, res) {
res.sendfile('./www/index.html');
});
app.listen(port, function() {
console.log(
`Server listening on port ${port}!`
);
});
EDIT - Just correcting an issue in the .listen
solution2
0 2019-12-10 15:06:41
Cannot POST /doctors in express means that a particular route doesn't exist.
Can you show more code, on what port are you posting ?
solution3
0 2019-12-10 15:13:58
Did you set the right content type in the request?
Content-Type: application/json
Else, the req.body.doctorID will return undefined .
solution4
0 2019-12-10 15:19:22
I just tested this successfully.. It appears the issue is with your Mongo code..
Try this, if it works, you know the issue is with the Mongo section.
This is how I am sending the requests.. using Postman
This shows how I am able to receive the request:
const express = require('express');
const bodyParser = require('body-parser');
//const mongoose = require('mongoose');
const app = express();
const router = express.Router();
//const MongoClient = require('mongodb').MongoClient;
//const client = new MongoClient(uri, { useNewUrlParser: true });
//const morgan = require('morgan');
//var Doctor = require('./www/js/user.js');
app.use(bodyParser.json());
app.use(express.static('www'));
//app.use(morgan('dev'));
app.use(bodyParser.urlencoded({ 'extended': 'true' }));
app.use(bodyParser.json());
//const mongoURL = 'mongodb://localhost:27017/app';
/*
mongoose.connect(mongoURL, function (err) {
if (err) {
console.log('Not connected to the database:' + err);
} else {
console.log('Successfully connected to MongoDB');
}
});
*/
app.post('/doctors', function (req, res) {
console.log(req.body);
res.status(200).send();
/*
var doctor = new Doctor();
doctor.doctorID = req.body.doctorID;
doctor.password = req.body.password;
doctor.save();
res.send('doctor created');
*/
});
// Configure port
const port = process.env.PORT || 8080;
// Listen to port
app.listen(port);
console.log(`Server is running on port: ${port}`);
app.get('*', function (req, res) {
res.sendfile('./www/index.html');
});
To expand on this answer.. I usually configure Mongoose in the following manner..
Folder Structure:
root
|- database
|- index.js
|- models
|- someModel.js
In /root/database/index.js :
'use strict'
const mongoose = require('mongoose');
const mongoBaseUrl = `mongodb://server:27017/collection`;
const mongoDB = mongoose.createConnection(mongoBaseUrl, { useNewUrlParser: true, promiseLibrary: global.Promise });
mongoose.set('useCreateIndex', true) // needed to suppress errors
module.exports = mongoDB;
Then in /root/models/someModel.js :
'use strict'
const mongoose = require('mongoose');
const mongoConnection = require('../database');
const modelName = "SomeModel";
const collection = "SomeCollection";
const databaseName = "SomeDatabase";
const myDatabase = mongoConnection.useDb(databaseName);
const SomeSchema = new mongoose.Schema({
// Schema data here
})
module.exports = myDatabase.model(modelName, SomeSchema, collection) // (database, schema, collection)
Then to use it in your routes:
const Doctor = require('./models/someModel.js');
app.post('/route/', (req, res, next) => {
var doctor = new Doctor();
doctor.doctorID = req.body.doctorID;
doctor.password = req.body.password;
doctor.save();
res.send('doctor created');
});
Something to that effect. Hope this helps.
solution5
-1 2019-12-10 15:43:59
It turns out the issue was with neither, we had a duplicated server.js, and it was referencing the incorrect one. Thanks for the help anyway! Hope this thread helps someone else.
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