screen/application/admin/validate/Coupon.php

<?php

namespace app\admin\validate;

use think\Validate;

class Coupon extends Validate
{
    /**
     * 验证规则
     */
    protected $rule = [
        'amount|金额'=>['require'],
        'amount_full|满足金额'=>['require','requireIf:type,1'],
        'num|数量'=>['require','gt:0'],
        'time_start|开始时间'=>['require','gt:0'],
        'time_end|结束时间'=>['require','gt:0'],
    ];
}