How add Custom Validation Rules when using Form Request Validation in Laravel 5

Question

I am using form request validation method for validating request in laravel 5.I would like to add my own validation rule with form request validation method.My request class

Answer 1

You don't need to extend the validator to validate array items, you can validate each item of a array with "*" as you can see in Array Validation

protected $rules = [
      'shipping_country' => ['max:60'],
      'items' => ['array'],
      'items.*' => 'integer'
];

Answer 2

Using Validator::extend() like you do is actually perfectly fine you just need to put that in a Service Provider like this:

<?php namespace App\Providers;

use Illuminate\Support\ServiceProvider;

class ValidatorServiceProvider extends ServiceProvider {

    public function boot()
    {
        $this->app['validator']->extend('numericarray', function ($attribute, $value, $parameters)
        {
            foreach ($value as $v) {
                if (!is_int($v)) {
                    return false;
                }
            }
            return true;
        });
    }

    public function register()
    {
        //
    }
}

Then register the provider by adding it to the list in config/app.php:

'providers' => [
    // Other Service Providers

    'App\Providers\ValidatorServiceProvider',
],

You now can use the numericarray validation rule everywhere you want

Answer 3

You need to override getValidatorInstance method in your Request class, for example this way:

protected function getValidatorInstance()
{
    $validator = parent::getValidatorInstance();
    $validator->addImplicitExtension('numericarray', function($attribute, $value, $parameters) {
        foreach ($value as $v) {
            if (!is_int($v)) {
                return false;
            }
        }
        return true;
    });

    return $validator;
}