如何将 Laravel 验证消息更改为以 MB 为单位的最大文件大小而不是 KB？

Question

Laravel 带有这个验证消息，显示文件大小以千字节为单位：

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

我想以显示兆字节而不是千字节的方式对其进行自定义。 所以对于用户来说，它看起来像：

“文档不能超过 10 兆字节。”

我该怎么做？

Answer 1

将resources\lang\en\validation.php中的字符串改为

'file' => ':attribute 不能超过 10 兆字节。',

并将$rule 定义为

$rules = array(
   'file'=>'max:10000',
);

Answer 2

我们可能在不同的页面上，这就是我想说的。我希望这有帮助。干杯！

public function rules()
{
    return [
        'file' => 'max:10240',
     ];
}

public function messages()
{
    return [
        'file.max' => 'The document may not be greater than 10 megabytes'
    ];
}

Answer 3

您可以扩展验证器以添加您自己的规则并使用相同的逻辑而无需转换为 kb。您可以向您的 AppServiceProvider 添加对 Validator::extend 的调用。

<?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];
        });
    }
}

然后要添加错误消息，您只需将其添加到您的验证语言文件中即可。

See the section on custom validation rules in the manual

Answer 4

这就是我将如何使用带有自定义验证消息的请求进行验证，以 MB 而不是 KB：

1. 在 App\HTTP\Requests 文件夹中创建一个名为 StoreTrackRequest.php 的请求文件，内容如下

   <?php
   
   namespace App\Http\Requests;
   
   use App\Http\Requests\Request;
   
   class StoreTrackRequest extends Request
   {
       /**
        * Determine if the user is authorized to make this request.
        *
        * @return bool
        */
       public function authorize()
       {
           return true;
       }
   
       /**
        * Get the validation rules that apply to the request.
        *
        * @return array
        */
       public function rules()
       {
           return [
               "name" => "required",
               "preview_file" => "required|max:10240",
               "download_file" => "required|max:10240"
           ];
       }
   
       /**
        * Get the error messages that should be displayed if validation fails.
        *
        * @return array
        */
       public function messages()
       {
           return [
               'preview_file.max' => 'The preview file may not be greater than 10 megabytes.',
               'download_file.max' => 'The download file may not be greater than 10 megabytes.'
           ];
       }
   }
   

2. 在控制器内部确保通过 StoreTrackRequest 请求执行验证：

   public function store($artist_id, StoreTrackRequest $request)
   {
        // Your controller code
   }
   

Answer 5

文件： app/Providers/AppServiceProvider.php

public function boot()
{
    Validator::extend('max_mb', function ($attribute, $value, $parameters, $validator) {

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

        // SplFileInfo::getSize returns filesize in bytes
        $size = $value->getSize() / 1024 / 1024;

        return $size <= $parameters[0];

    });

    Validator::replacer('max_mb', function ($message, $attribute, $rule, $parameters) {
        return str_replace(':' . $rule, $parameters[0], $message);
    });
}

不要忘记导入正确的类。

---

文件： resources/lang/en/validation.php

'max_mb' => 'The :attribute may not be greater than :max_mb MB.',

'accepted'             => 'The :attribute must be accepted.',
'active_url'           => 'The :attribute is not a valid URL.',
...

相应地更改config('upload.max_size')。

Answer 6

这个功能有效

public function getSize()
{
    $mb = 1000 * 1024;

    if ($this->size > $mb)
        return @round($this->size / $mb, 2) . ' MB';
    return @round($this->size / 1000, 2) . ' KB';
}