[SOLVED] How to change Laravel Validation message for max file size in MB instead of KB?

How to change Laravel Validation message for max file size in MB instead of KB?

Laravel comes with this validation message that shows file size in kilobytes:

file' => 'The :attribute may not be greater than :max kilobytes.',

I want to customize it in a way that it shows megabytes instead of kilobytes. So for the user it would look like:

"The document may not be greater than 10 megabytes."

How can I do that?

Solution

You can create your own rule, and use the same logic as existing rule, but without the conversion to KB.

To do that, add a call to Validator::extend method in your AppServiceProvider.php file, like:

<?php namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Symfony\Component\HttpFoundation\File\UploadedFile;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        Validator::extend('max_mb', function($attribute, $value, $parameters, $validator) {
            $this->requireParameterCount(1, $parameters, 'max_mb');

            if ($value instanceof UploadedFile && ! $value->isValid()) {
                return false;
            }

            // If call getSize()/1024/1024 on $value here it'll be numeric and not
            // get divided by 1024 once in the Validator::getSize() method.

            $megabytes = $value->getSize() / 1024 / 1024;

            return $this->getSize($attribute, $megabytes) <= $parameters[0];
        });
    }
}

Then to change the error message, you can just edit your validation lang file.