Questions tagged [express-validator]

A middleware library for validation and sanitization specifically designed for express.js.

Body function in Express Validator is malfunctioning

Currently, I'm facing an issue while validating data input from an API call using express-validator version 6.11.1. Every time I try to validate using either check or body, I encounter the error message shown below: TypeError: body(...).not(...).IsEmpty i ...

Validating email IDs in an array with express-validator

Consider this scenario where a post request is made with the following body: { "from":"<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="d5b8a7fbad95b0adb4b8a5b9b0fbb6bab8">[email protected]</a>&qu ...

Tips for retaining form data after validation failure in a node.js application

Currently, I am working on validating form data using express validator. To keep the form fields populated even after a validation failure, I have split my routes and controllers into separate files. The validation process is being handled by express valid ...

Why is it that instead of a callback, I am receiving an [Object Promise]?

I am facing an issue while setting up a registration page with express-validator. After upgrading the middleware to version 6.2, I started receiving an error when trying to run my app. It seems to be related to the Validator section, as it was working fine ...

Encountering a 400 error in Ajax following the execution of server-side validation by Express

I'm currently troubleshooting a form handler that consistently throws a 400 error post middleware validation. The middleware validation steps are as follows: const contactValidate = [ check('name') .exists() .trim() .escape() .not() ...

The body function in Express-validator is not working as expected

Despite following the example provided in the documentation, I am facing difficulties getting express-validator to work properly. The error message "uncaughtException: body is not a function" is appearing, even though I am using express-validator version 5 ...

Verifying an array of objects in NodeJS

Here is an example of the array I am working with: settings: [ { key: 'maxImageSize', value: '512' }, { key: 'maxFileSize', value: '2048' }, { key: 'searchResultsLimit', value: '10' ...

The validation function for email addresses in Express-validator seems to be malfunctioning

I've encountered an issue with the validation process in my code. Everything seems to be working fine except for the .isEmail method, which keeps flagging even valid email addresses as invalid. No matter how I adjust the validation rules, the problem per ...

What errors have been made on the router at localhost:4000/rooms/book/1?

const express = require("express"); const { body, validationResult } = require("express-validator"); const app = express(); const PORT = 4000; app.use(express.json()); const rooms = []; const booking = []; // creating room app.post( ...

Issue with express-validator returning undefined value on forms set to enctype='multipart/form-data'

Currently, I am developing a login authentication application using basic node.js+express. While extracting values (such as name, email, etc) from the registration page, I utilize express-validator for validation. However, I encounter an issue where all va ...

Validator Express: Left-hand Side Brackets

Can LHS Brackets be validated in express-validator for advanced filtering? Here is an example querystring: ?test[gt]=1 I have attempted the following validations: query("test.gt").isAlphanumeric() query("test[gt]").isAlphanumeric() I ...

What is the best way to verify and eliminate unnecessary attributes from a JSON request payload in a node.js application?

My goal is to verify the data in the request payload and eliminate any unknown attributes. Example of a request payload: { "firstname":"john", "lastname":"clinton", "age": 32 } Required attributes: firstname and lastname Optional a ...

Validation error from Express-validator may result in TypeScript error: the request.query object could potentially be undefined

Recently, as I was developing a Node.js app using express, I decided to enhance it with express-validator. Despite being new to express-validator, the warnings it generated perplexed me due to its lack of detailed documentation. To illustrate my point, he ...

Understanding the Flow of Parameters in Express Validator Functions

I am wondering about how the parameters are passed to the validator middleware. This snippet is extracted from express-validator. For instance, the parameter programming_language is passed to the check() function. const { check, oneOf, validationResult ...

How to use Express Validator to validate both email and username within a single field?

I am currently developing an application using the Express (Node.js framework) and I want to allow users to log in with either their email address or username. My question is, how can I implement validation for both types of input on the same field using e ...

What could be the reason for why get/post methods are causing Unauthorized (401) errors?

My project involves both a log-in and sign-up feature. For the sign-up part, I utilized Express-Validator, while for the log-in part, I integrated Passport.JS. However, when I added the passport JS declaration in app.js, it resulted in an Unauthorized erro ...

Is it better to use express-validator input sanitation within a middleware or router callback?

I'm exploring ways to enhance the security of my express app by incorporating the express-validator package. I found that there are two distinct methods in which I could utilize it. The first method involves using it within a middleware: const {check}=req ...

Ensuring data integrity with Express Validator - Restricting input to letters, numbers, and select

After successfully implementing JavaScript regex that allows letters, numbers, and some special characters on the front end, I am now faced with the challenge of replicating this validation process using express-validator on the backend. Currently, within ...

What distinguishes {key:" "} from {key:" "}, when it comes to JSON files?

I have been working on implementing validation using express Router. The issue I encountered is that when I pass {title:""}, the express-validator does not throw an error. However, when I pass {title:" "}, it works properly. exports.postValidatorCheck = [ ...

Utilizing the request body value within the .withMessage() function of the Express validator chain

I am looking to showcase my express validator errors with the specific value entered by the user. For instance, if a user types in an invalid username like "$@#" (using a regex that I will provide), I want to return my error message as follows : { "er ...

Validation for nested fields in objects using express-validator if the object exists

I am currently working on a Rest API Project using Express and NodeJs, with the addition of Express-Validator for request object validation. Within one of my services, the request body looks like this: { "name": "some value", " ...

How can I omit extra fields when using express-validator?

Currently, I am integrating express-validator into my express application and facing an issue with preventing extra fields from being included in POST requests. The main reason for this restriction is that I pass the value of req.body to my ORM for databas ...

The passport authentication process is currently stalled and failing to provide any results

The current authentication process is functioning properly app.post('/login', passport.authenticate('local-login', { successRedirect: '/home', failureRedirect: '/login', failureFlash: true }) ); Howev ...

Send a middleware out of a middleware function

I'm currently utilizing express-validator and I'm looking to implement varying checks based on a value in the request body. Although I've created a function for this purpose, it seems that I'm not receiving any responses back from express: validation/pro ...

Is it feasible to verify the request body in Node.js and Express without relying on a library?

After receiving feedback from a developer about the need to validate my request, I have consulted the code provided below: router.post('/dashboard', passport.authenticate('jwt', { session: false }), (req, res) => { try { ...

Is it advisable to clean user inputs in express js?

After utilizing express-validator's escape() function to sanitize user inputs and storing the escaped data in the database using parameterized queries, I encountered an issue when rendering the input from the database with the EJS view engine. The escape ...

How can I verify if the first character is a letter using express-validator?

case 'username': { return [ check( 'content.data.username', 'Username must contain at least one letter' ) // .matches('(?=.*[a-z])(?=.*[0-9])') .exists() ...

using an array as an argument in an express POST request

I am currently exploring express-validator, and I came across a specific example in the documentation that caught my attention. The example code snippet is as follows: const { check, validationResult } = require('express-validator/check'); app.post('/use ...

What is the proper way to invoke express-validator within a middleware function?

I am facing a challenge in invoking the express-validator function from a middleware function. Although I can see that the execution is happening within the express-validator, validation does not seem to occur. The code snippet is provided below: router.g ...