Laravel model validation rules

This package is an alternative to the Laravel built-in validation rules exists and unique. It uses Eloquent models instead of directly querying the database.

Advantages

• The rule can be easily extended with the Eloquent builder. (scopes etc.)
• Soft deletes are working out of the box.
• Logic implemented into the models work in the validation as well. (multi tenancy system, etc.)

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Installation

You can install the package via composer with following command:

composer require korridor/laravel-model-validation-rules

If you want to use this package with older Laravel/PHP version please install the 2.1.* version.

composer require korridor/laravel-model-validation-rules "^2.1"

Requirements

This package is tested for the following Laravel and PHP versions:

• 10.* (PHP 8.1, 8.2, 8.3)
• 11.* (PHP 8.2, 8.3)

Usage examples

PostStoreRequest

use Korridor\LaravelModelValidationRules\Rules\UniqueEloquent;
use Korridor\LaravelModelValidationRules\Rules\ExistsEloquent;
// ...
public function rules(): array
{
    $postId = $this->post->id;
    
    return [
        'username' => [new UniqueEloquent(User::class, 'username')],
        'title' => ['string'],
        'content' => ['string'],
        'comments.*.id' => [
            'nullable',
            new ExistsEloquent(Comment::class, null, function (Builder $builder) use ($postId) {
                return $builder->where('post_id', $postId);
            }),
        ],
        'comments.*.content' => ['string']
    ];
}

PostUpdateRequest

use Korridor\LaravelModelValidationRules\Rules\UniqueEloquent;
use Korridor\LaravelModelValidationRules\Rules\ExistsEloquent;
// ...
public function rules(): array
{
    $postId = $this->post->id;
    
    return [
        'id' => [new ExistsEloquent(Post::class)],
        'username' => [(new UniqueEloquent(User::class, 'username'))->ignore($postId)],
        'title' => ['string'],
        'content' => ['string'],
        'comments.*.id' => [
            'nullable',
            new ExistsEloquent(Comment::class, null, function (Builder $builder) use ($postId) {
                return $builder->where('post_id', $postId);
            }),
        ],
        'comments.*.content' => ['string']
    ];
}

Custom validation message

If you want to change the validation message for one specific case, you can use the withMessage(...) function to add a custom validation message. With withCustomTranslation(...) you can set a custom translation key for the validation message. As described in detail in the next example (Customize default validation message), it is possible to use :attribute, :model and :value in the translation.

use Korridor\LaravelModelValidationRules\Rules\UniqueEloquent;
use Korridor\LaravelModelValidationRules\Rules\ExistsEloquent;
// ...
public function rules(): array
{
    $postId = $this->post->id;
    
    return [
        'id' => [(new ExistsEloquent(Post::class))->withMessage('The ID already exists.')],
        'username' => [
            (new UniqueEloquent(User::class, 'username'))
                ->ignore($postId)
                ->withCustomTranslation('validation.custom.username.unique_eloquent')
        ],
        'title' => ['string'],
        'content' => ['string'],
        'comments.*.id' => [
            'nullable',
            new ExistsEloquent(Comment::class, null, function (Builder $builder) use ($postId) {
                return $builder->where('post_id', $postId);
            }),
        ],
        'comments.*.content' => ['string']
    ];
}

Customize default validation message

If you want to customize the translations of the default validation errors you can publish the translations of the package to the resources/lang/vendor/modelValidationRules folder.

php artisan vendor:publish --provider="Korridor\LaravelModelValidationRules\ModelValidationServiceProvider"

You can use the following attributes in the validation message:

• attribute
• model
• value

return [
    'exists_model' => 'A :model with the :attribute ":value" does not exist.',
    'unique_model' => 'A :model with the :attribute ":value" already exists.',
];

Example outputs would be:

• A user with the id "2" does not exist.
• A user with the id "2" already exists.

Contributing

I am open for suggestions and contributions. Just create an issue or a pull request.

Local docker environment

The docker folder contains a local docker environment for development. The docker workspace has composer and xdebug installed.

docker-compose run workspace bash

Testing

The composer test command runs all tests with phpunit. The composer test-coverage command runs all tests with phpunit and creates a coverage report into the coverage folder.

Codeformatting/Linting

The composer fix command formats the code with php-cs-fixer. The composer lint command checks the code with phpcs.

Credits

The structure of the repository and the TestClass is inspired by the project laravel-validation-rules by spatie.

License

This package is licensed under the MIT License (MIT). Please see license file for more information.