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Express Validator Methods

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Questions and Answers

What additional methods are available for the Sanitization Chain?

.isArray (correct)

.isObject

.isString

.bail

What is the purpose of the .bail() method?

To prevent a custom validator from running (correct)

To check for the existence of the current fields in the request

To customize the behavior of the validation chain

To add a validator to the current validation chain

What is the .exists() validator used for?

To prevent a custom validator from running

To check for the existence of the current fields in the request (correct)

To customize the behavior of the validation chain

To add a validator to the current validation chain

Study Notes

A validation chain is a subset of the Sanitization Chain, which means all standard sanitizers and its additional methods are available.
Additional methods include .isArray, .isObject, and .isString.
The .bail() method can be used to prevent a custom validator from running when you know it will fail.
You can add a validator to the current validation chain by calling .custom().
The .exists() validator checks for the existence of the current fields in the request.
You can customize this behavior by passing an object with the .if() and .withMessage() options.

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Description

Learn about the Express Validator methods including validation chain, standard sanitizers, additional methods, customization with .if() and .withMessage(), .bail() method, and adding a custom validator with .custom().