Registry / testing / class-validator-message-formatter

class-validator-message-formatter

library0.0.3jsnpmunverified

A lightweight utility for formatting class-validator validation errors into a cleaner, more readable structure. Version 0.0.3, no active release cadence. Key differentiator: transforms the complex ValidationError array from class-validator into a simple array of {field, message} objects, making it easier to display or process validation errors in applications.

testing

npm install class-validator-message-formatter

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · CLASS-VALIDATOR-ME

class-validator-message-formatter

testingjavascriptv0.0.3

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

MessageFormatter

✓ import { MessageFormatter } from 'class-validator-message-formatter'

ESM only; no CommonJS export.

ValidationError

✓ import { ValidationError } from 'class-validator'

✗ import { ValidationError } from 'class-validator-message-formatter'

ValidationError is from class-validator, not this package.

default import

✓ import { MessageFormatter } from 'class-validator-message-formatter'

✗ import MessageFormatter from 'class-validator-message-formatter'

Only named export exists.

Demonstrates formatting class-validator validation errors into simplified {field, message} array.

import { validateSync } from 'class-validator'; import { IsString } from 'class-validator'; import { MessageFormatter } from 'class-validator-message-formatter'; class User { @IsString() name: string; @IsString() address: string; constructor(name: string, address: string) { this.name = name; this.address = address; } } const user = new User(); const errors = validateSync(user); const formatted = MessageFormatter.format(errors); console.log(formatted); // Output: // [ { field: 'name', message: 'name must be a string' }, // { field: 'address', message: 'address must be a string' } ]

Debug

Known issues

gotchaMessageFormatter.format expects argument of type ValidationError[]; passing wrong type will cause runtime error.

fix

Ensure input is the array returned by validate or validateSync.

affects: >=0.0.1

gotchaPackage only works with class-validator, not standalone validation.

fix

This package is a helper for class-validator and does not replace it.

affects: >=0.0.1

Errors

Common errors & fixes

TypeError: MessageFormatter.format is not a function

Incorrect import: default import instead of named import.

fix

Use import { MessageFormatter } from 'class-validator-message-formatter' instead of import MessageFormatter from ...

Cannot find module 'class-validator-message-formatter'

Package not installed or typo in package name.

fix

Run npm install class-validator-message-formatter and ensure no typo.

Upgrade

Version history

0.0.3latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

14 hits · last 30 days

node

OpenAI (training)

Resources

githubhttps://github.com/loveloper44/class-validator-message-formatter ↗

packageclass-validator-message-formatter ↗

homepagehttps://github.com/loveloper44/class-validator-message-formatter#readme ↗