NN2022100801/app/Rules/File.php

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;
use Illuminate\Support\Facades\Storage;

class File implements Rule
{
    /**
     * Create a new rule instance.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }

    /**
     * Determine if the validation rule passes.
     *
     * @param  string $attribute
     * @param  mixed $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        if (Storage::disk('api')->exists($value)) {
            return true;
        }
        return false;
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return '文件不存在';
    }
}