myc/app/validate/api/StoreCartValidate.php

<?php




namespace app\validate\api;

use think\Validate;

class StoreCartValidate extends Validate
{
    protected $failException = true;

    protected $rule = [
        'product_id|商品ID' => 'require',
        'product_attr_unique|SKU' => 'require',
        'cart_num|购买数量' => 'require|number|>:0',
    ];
}