How to handle data validation in node using validatorjs?
The validator function which extends the library’s validator constructor (as seen in src/helpers/validate.js above) accepts four arguments — data to be validated, the validation rule, custom error messages (if any), and a callback method. To apply validation rules to our request body (i.e req.body), object key names have to be the same.
How to have path alias in Node.js?
There is an npm package called module-alias that may do what you are looking for. Updated answer for 2021. This allows for you to add the following to package.json The best way to approach this would be to use a global (config) container.
Why do we need validation middleware in node?
This will help simplify our code when writing multiple validation middlewares. In the snippet above, we’re defining a signup function that contains our validation rules.
What happens if form does not match Validation rule?
Your input values do not match the validation rule then It will display an error message otherwise it will allow you to submit the form. Here I have taken a simple form to validate their input data.
How to validate data using express-validator module in…?
Validation in node.js can be easily done by using the express-validator module. This module is popular for data validation. There are other modules available in market like hapi/joi, etc but express-validator is widely used and popular among them. You can install this package by using this command.
Why is validation important in a Backend API?
Nkere-Awaji Inwan Follow Full-stack/GitOps engineer at Mercurie. GCP fanboy. I write code and about code. Building backend APIs comes with many hassles. One of which is user input validation. It’s important to add an extra layer of validation to incoming data because you can never rely on the users’ input alone.