README

This package provides JsonApiError and JsonApiErrorResponse classses to conveniently handle errors following the JSON:API specification.

The JsonApiErrorResponse extends the JsonResponse from symfony/http-foundation, so this package is meant to be used in projects using that.

Table of contents:

• Install
• Usage
  • Return a simple error response
  • Return multiple errors
  • Build response from JsonApiError objects
• Local Development
• Credits

Install

Install this package via composer:

composer require wunderwerkio/jsonapi-error

Usage

Return a simple error response

<?php

use Symfony\Component\HttpFoundation\Response;
use Wunderwerk\JsonApiError\JsonApiErrorResponse;

function someRequestHandler(): Response {
  return JsonApiErrorResponse::fromArray([
    'code' => 'application_error_code',
    'title' => 'An error occured!',
    'status' => 500,
  ]);
}

The above code would result in a JSON response with the following payload:

{
  "errors": [{
    "status": 500,
    "code": "application_error_code",
    "title": "An error occured!"
  }]
}

Return multiple errors

<?php

use Symfony\Component\HttpFoundation\Response;
use Wunderwerk\JsonApiError\JsonApiErrorResponse;

function someRequestHandler(): Response {
  return JsonApiErrorResponse::fromArrayMultiple([
    [
      'status' => 422,
      'code' => 'validation_failed',
      'title' => 'Invalid request payload',
      'detail' => 'The "name" field is required.',
      'source' => [
        'pointer' => '/data/name'
      ]
    ],
    [
      'status' => 422,
      'code' => 'validation_failed',
      'title' => 'Invalid request payload',
      'detail' => 'The "description" field is required.',
      'source' => [
        'pointer' => '/data/description'
      ]
    ],
  ]);
}

The above code would result in a JSON response with the following payload:

{
  "errors": [{
    "status": 422,
    "code": "validation_failed",
    "title": "Invalid request payload",
    "detail": "The \"name\" field is required.",
    "source": {
      "pointer": "/data/name"
    }
  }, {
    "status": 422,
    "code": "validation_failed",
    "title": "Invalid request payload",
    "detail": "The \"description\" field is required.",
    "source": {
      "pointer": "/data/description"
    }
  }]
}

Build response from JsonApiError objects

To ease building a response with multiple errors, the response can also be created by constricting it by passing an array of JsonApiError objects.

<?php

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Response;
use Wunderwerk\JsonApiError\JsonApiError;
use Wunderwerk\JsonApiError\JsonApiErrorResponse;

function someRequestHandler(Request $request): Response {
  /** @var JsonApiError[] $errors */
  $errors = [];

  $payload = $request->getContent();
  $entity = json_decode($payload, TRUE);

  // Make sure 'name' field is set.
  if (!array_key_exists('name', $entity['data'])) {
    $errors[] = JsonApiError::fromArray([
      'status' => 422,
      'code' => 'validation_failed',
      'title' => 'Invalid request payload',
      'detail' => 'The "name" field is required.',
      'source' => [
        'pointer' => '/data/name',
      ],
    ]);
  }

  // Make sure 'description' field is set.
  if (!array_key_exists('description', $entity['data'])) {
    $errors[] = JsonApiError::fromArray([
      'status' => 422,
      'code' => 'validation_failed',
      'title' => 'Invalid request payload',
      'detail' => 'The "description" field is required.',
      'source' => [
        'pointer' => '/data/description',
      ],
    ]);
  }

  if (!empty($errors)) {
    return new JsonApiErrorResponse($errors);
  }

  return new JsonResponse([
    'status' => 'success',
  ]);
}

Local Development

A local dev environment can be created using nix:

# For PHP 8.1
nix develop '#.php81'
# For PHP 8.2
nix develop '#.php82'
# For PHP 8.3
nix develop '#.php83'

Run tests

composer test

Lint with PHPStan

composer analyze

Credits

This project took inspiration from the following awesome projects:

• SineMah/json-api-error