contrast_ai/app/validate/DigitValidate.php

<?php

namespace app\validate;

use think\Validate;

class DigitValidate extends Validate
{
    protected $rule = [
        'name'  => 'require|max:25',
        'content' => 'require|max:2000',
        'role' => 'require|integer',
        'back' => 'require|integer',
        'audio' => 'require|integer',
        'stage' => 'require|float',
    ];

}