I'm developing a node.js app with express and mongoDb and mongoose. The app saves the user in the code below with no problem, but in this code it always console error even if the process is success, and the user is saved.
I'm trying to make flash messages and validation but I can't go ahead with this problem.
Also, I'm not sure if I'm using the right post method or not(should I use res.status(500).send('error')) inside the post?
newUser.save().then(function (error) {
if (error) {
console.log('error') // always prints this
} else {
console.log('success')
}
})
the full code
var User = require('../models/User')
var router = require('express').Router()
router.route('/user/signup')
.get(function (request, response) {
// render the form
response.render('user/signup')
})
.post(function (request, response) {
var username = request.body.name
var password = request.body.password
var newUser = new User({
name: username,
password: password
})
newUser.save().then(function (error) {
if (error) {
console.log('error')
} else {
console.log('success')
}
})
response.redirect('/')
})
I think you want to pass the function directly to save() as the callback
newUser.save(function (err, user) {
if (err) ..
})
With the approach you're currently taking, I think you'll want to use catch
newUser.save().then(function (user) }})
.catch((err) => ...);
Source: mongoose docs
Related
I am using Typescript, Express, PostgresDB.
Here is my code for connecting to the database cluster.
import { Pool } from "pg";
const myPool = new Pool({
host: `${process.env.DATABASE_URL}`, //somedb.abc.us-east-1.rds.amazonaws.com
database: `${process.env.DATABASE_NAME}`, //dbName
user: `${process.env.DATABASE_USER}`, //dbUser
password: `${process.env.DATABASE_PASSWORD}`, //dbPassword
port: 5432
});
myPool.connect();
Here is my post route:
const router = express.Router();
router.post("/item/new", async (request, response) =>{
try{
const { itemTitle } = request.body;
const myItem = await myPool.query(`INSERT INTO items VALUES('${itemTitle}')`), (resp, err) =>{
if(err){
return err;
}
return resp;
});
return response.status(201).json({message: myItem});
}catch(err){
return response.status(400).json({message: `${err}`});
}
});
When I send the request, I get the following response with a 201 status code, but nothing
is inserted into the database:
{
"message": {}
}
It's because you're sending the callback function with the wrong argument's order. The first argument for the callback is error, not result.
It should be like this:
client.query('SELECT NOW() as now', (error, result) => {
if (error) {
console.log(error.stack)
} else {
console.log(result.rows[0])
}
})
documentation.
You can try to print the query that you are passing to find the error.
The reason is that you are concatenating a json object with string which is wrong, instead try this:
`INSERT INTO items(col1, col2) VALUES(${itemTitle.col1}, ${itemTitle.col2})`
I've been trying to make an express middleware that sends an email using Nodemailer after the previous middleware finishes. I've come up with a few different designs, but ultimately each different version has it's drawback.
Ultimately, I would like the middleware to have a response from the previous middleware. If it is a success, then send a success email, otherwise, send an error email.
I came up with a dual design where one variation pushes to an error middleware, and a success leads to the next middleware. This contains some slight issues of sending multiple headers, specifically on an the second middleware erroring. I could say, if the mail errors out, do nothing. But that doesn't seem right. If anyone has any suggestions on a good design, that would be great.
From what you described, I would suggest not to create different middleware for that, but to just create one generic email function that would handle different type of messages. Then, just use that function in the first middleware and pass different parameters based on use case (success/error).
email-controller.js
const nodemailer = require('nodemailer');
const transporter = nodemailer.createTransport({
host: process.env.EMAIL_HOST,
port: process.env.EMAIL_PORT,
secure: true,
auth: {
user: process.env.SMTP_USER,
pass: process.env.SMTP_PASSWORD,
},
});
exports.send_email_message = (send_to, subject, message) => {
return new Promise((resolve, reject) => {
const email_message = {
from: { name: process.env.EMAIL_FRIENDLY_NAME },
to: send_to,
subject: subject,
text: message
};
transporter.sendMail(email_message).then(() => {
resolve(true);
}).catch((error) => {
reject(false);
});
})
}
custom-router.js
const { send_email_message } = require('./email-controller');
const express = require('express');
const router = express.Router();
router.get('/custom-middleware', async (req, res, next) => {
try {
// You can calculate "success" variable based on your custom logic
if(success){
await send_email_message('example#gmail.com', 'Success', 'This is body of success message.');
return res.status(200).json({ success: true });
} else {
await send_email_message('example#gmail.com', 'Error', 'This is body of error message.');
return res.status(400).json({ success: false });
}
} catch(error) {
return res.status(400).json({ success: false });
}
});
module.exports = router;
The success function works perfectly fine when it comes to receiving data from the express backend server and manipulating it. I'm unable to handle error thrown by the backend properly. It is possible to get status code (400 or other) and the related text (Bad request, etc) but not the actual message which the express backend sends.
Backend login code
router.post("/users/login", async (req, res) => {
try {
const user = await User.findByCredentails(
req.body.email,
req.body.password
);
const token = await user.generateAuthToken();
res.send({ user, token });
} catch (error) {
res.status(400).json({ error: error.message }); //error.message is thrown by the database (which logs perfectly fine in the backend when some error occurs)
}
});
Database code that sends the message (There is no error in this; putting this here just for the reference)
userSchema.statics.findByCredentails = async (email, password) => {
const user = await User.findOne({ email });
if (!user) throw new Error("Unable to find a user with the entered email");
const isMatch = await bcrypt.compare(password, user.password);
if (!isMatch) throw new Error("Incorrect password, try again");
return user;
};
Frontend code (which is working fine for success but not error)
function login() {
const data = {
email: $("#email-field").val(),
password: $("#password-field").val()
};
$.ajax({
url: "/users/login",
method: "POST",
data,
success: function(userData) {
console.log(userData); //works just fine
},
error: function(jqXHR) {
//how can I get that error message here. I'm able to get jqXHR.status and .textStatus but not the actual message that I want.
}
});
}
I am making a web application that allows Fortnite players to find other players to play with. Users should be able to register, login, post and comment. I have designed the frontend portion of the user login and registration features as well as the backend of the user registration but one of my requirements is that:
Before registration, the server should check whether the username provided is a real Fortnite username using the FortniteTracker API which provides user profiles using their very simple API.
Example Call: GET https://api.fortnitetracker.com/v1/profile/{platform}/{epic-nickname}
How do I verify the username exists before allowing the user to create the account?
I have tried creating a separate endpoint for the API call from the server side but I didn't know how to implement it into my /register endpoint
script.js
function registerRequest(username,password) {
$.ajax({
url: "http://localhost:8080/register",
type: 'POST',
data: JSON.stringify({username,password}),
contentType: "application/json",
error : function(err) {
console.log('Error here!', err)
},
success: function(data) {
console.log('Success!')
// What do I put here?
}
});
}
function handleRegisterSubmit(event) {
event.preventDefault();
const username = $(event.currentTarget).find('.username-register').val()
const password = $(event.currentTarget).find('.password-register').val()
const passwordConfirm = $(event.currentTarget).find('.password-confirm').val()
if (password === passwordConfirm) {
registerRequest(username,password)
}
else {
console.error("Passwords did not match")
}
}
$(function onLoad() {
displayRegisterPage()
$(`.js-content-section`).on('submit', '.js-register-form', handleRegisterSubmit)
}
})
server.js
app.post('/register', jsonParser, (req, res) => {
const requiredFields = ['username', 'password']
for (let i = 0; i < requiredFields.length; i++) {
const field = requiredFields[i]
if (!(field in req.body)) {
const message = `Missing \`${field}\` in request body`
console.error(message)
return res.status(400).send(message)
}
}
let username = req.body.username;
let password = req.body.password;
User.findOne({username})
.then(user => {
if (user) {
const message = `username is already taken`
console.error(message)
return res.status(400).send(message)
}
else {
User.create({username, password})
.then(user => {
const userRes = {
id: user._id,
username: user.username
}
res.status(201).json(userRes)
}
)
}
})
.catch(err => {
console.error(err)
res.status(500).json({ error: 'something went horribly wrong'})
})
})
app.get('/login', (req, res) => {
const usernameReq = User.findById(req.body.username);
if (usernameReq) {
console.log(usernameReq)
res.status(201).json(usernameReq)
}
})
schema.js
const UserSchema = new mongoose.Schema({
username: {
type: String,
unique: true,
required: true,
trim: true
},
password: {
type: String,
required: true,
}
});
const User = mongoose.model('User', UserSchema);
module.exports = User;
I expect that if I register with "ninja" as a username I should be able to register since that is a valid Fortnite username. The actual output currently allows users to register with any username that isnt already taken in the database.
You would need packages like axios, request, request-promise (Promise supported version of request) etc to make the external api call. You can try implementing within the register like.
const rp = require('request-promise');
app.post('/register', jsonParser, async (req, res) => {
...
let username = req.body.username;
let password = req.body.password;
const options = {
method : 'GET',
uri: 'https://api.fortnitetracker.com/v1/profile/{platform}/{epic-nickname}',
resolveWithFullResponse: true
}
const data = await rp(options)
// check if response code is 200 and check for the expected body
...
// continue rest of the code
}
Or have another middleware to call the external endpoint and do the checks like:
async function checkUser (req, res, next) {
const options = {
method : 'GET',
uri: 'https://api.fortnitetracker.com/v1/profile/{platform}/{epic-nickname}',
resolveWithFullResponse: true
}
const data = await rp(options)
// check if response code is 200 and check for the expected body
if (checks ok)
// if all check ok go to next middleware
next()
else
// if checks did not succeed
// you could pass error to error handler like next(new Error("Hey you do not exist"))
// or render something here
}
Then mount it like:
app.post('/register', jsonParser, checkUser, (req, res) {
...
You can do it simply by sending the username to the API https://api.fortnitetracker.com/v1/profile/{platform}/{epic-nickname}
It will give you a response mentioning about the user exists or not. Based on the response you can make another AJAX request to register the user only if the user does not exist.
I use a Promise request to resolve, reject when someone enters their username. It is only called onClick. in your request you will be able to determine if the call was successfull or not with the username.
I have a ReactJS and Redux connected to MongoDB, Mongoose.
I have a Mongoose Schema (user.js) set up like so:
var UserSchema = new Schema({
email: {
type: String,
lowercase: true,
unique: true,
required: true
},
})
And a API controller that receives the email string request, and then if nothing is entered in the text field, it sends a 422 error, and inside User.findOne, if the email already exists in the database, then it throws a 422 error and if not, does user.save to save it in the database.
"use strict";
const User = require('../models/user')
exports.register = function(req, res, next) {
const email = req.body.email;
console.log('ERROR 1')
if(!email) {
return res.status(422).send({ error: 'You must enter an email address.'})
console.log('ERROR 1')
}
User.findOne({ email: email }, function(err, existingUser) {
if(err) { return next(err); }
console.log('ERROR 2')
if(existingUser) {
return res.status(422).send({ error: 'That email address is already in use.'})
}
console.log('ERROR 3')
let user = new User({
email: email,
})
console.log('ERROR 4')
user.save(function(err, user) {
if(err) { return next(err); }
console.log('ERROR 5')
res.status(201).json({
user: user,
})
})
})
console.log('ERROR 6')
}
And I am making a POST request as such:
export function registerUser({ email }) {
return function(dispatch) {
axios.post(`${API_URL}/auth/register`, { email })
.then(response => {
console.log('THIS IS TESTING PURPOSE')
console.log(response)
dispatch({ type: AUTH_USER });
})
.catch((error) => {
errorHandler(dispatch, error.response, AUTH_ERROR)
});
}
}
I made several POST requests and all get successful status back from API with sever config: {'database': 'mongodb://localhost/practicedb',
'port': process.env.PORT || 3000}, yet the data never gets saved and database (practicedb) doesn't show up on Terminal.
Everything seem to be set up correctly but why the problem? Could I be missing something? Any insight or guidance would be really appreciated.
Thank you in advance!
Here are some logs and what's OPTIONS request that I never made:
Tried registering with same email again:
Correct if i'm wrong but your bare save method is not async. Save method return a promise. See http://mongoosejs.com/docs/promises.html
EDIT
user.save().then(function(doc) {
if (!doc) { next(new Error('Error while persisting!')); }
console.log('ERROR 5');
res.status(201).json({
user: doc
});
});
You can also achieve this with any promised library (Q, bluebird) or use ES6 Promise. Alternatively use async.
Example with Q. NOT TESTED:
"use strict";
const User = require('../models/user');
const Q = require('Q'); //add https://github.com/kriskowal/q
exports.register = function(req, res, next) {
const email = req.body.email;
console.log('ERROR 1')
if(!email) {
return res.status(422).send({ error: 'You must enter an email address.'})
console.log('ERROR 1')
}
var deferred = Q.defer();
User.findOne({ email: email }, function(err, existingUser) {
if(err) { return next(err); }
console.log('ERROR 2')
if(existingUser) {
return res.status(422).send({ error: 'That email address is already in use.'})
}
console.log('ERROR 3')
let user = new User({
email: email,
})
console.log('ERROR 4')
user.save(function(err, user) {
if(err) {
deferred.reject(err);
return next(err);
}
console.log('ERROR 5')
deferred.resolve(user); //
});
res.status(201).json({
user: deferred.promise,
})
})
console.log('ERROR 6')
}