Laravel 自定义校验规则 - Rule Objects

更新日期: 2019-01-11 阅读次数: 8714 分类: Laravel

需求

在使用 laravel backpack table 组件时,需要对几个自定义规格字段做校验。例如:

  • 名称、销售价格、成本价为必填
  • 价格确认为数字

而这个是用 laravel 自带的校验规则无法满足的。

Laravel 自定义校验规则 - Rule Objects

自定义校验规则

新建一个 Rule Objects

php artisan make:rule SpecFieldRequired

此时,会发现多了一个文件 app/Rules/SpecFieldRequired.php

模拟的输入数据

local.INFO: [{"name":"1斤装","price":"50","cost_price":"40","original_price":"60"},{"name":"2斤装","price":"100"},{"name":"3斤装","price":"150","cost_price":"120","original_price":"180"}]
local.INFO: [{"name":"1斤装","price":"50","cost_price":"40","original_price":"60"},{"name":"2斤装","price":"100"},{"name":"","price":"150","cost_price":"120","original_price":"180"}]
local.INFO: [{"name":"1斤装","price":"50","cost_price":"40","original_price":"60"},{"name":"2斤装","price":"100"},{"name":"","price":"150","cost_price":"120","original_price":"180"},{"price":"11"}]

app/Rules/SpecFieldRequired.php

public function passes($attribute, $value)
{
    $specs = json_decode($value);

    foreach ($specs as $spec) {
        if (array_key_exists('price', $spec)) {
            if (!is_numeric($spec->price)) {
                return false;
            }
        } else {
            return false;
        }

        if (array_key_exists('name', $spec)) {
            if (!trim($spec->name)) {
                return false;
            }
        } else {
            return false;
        }

        if (array_key_exists('cost_price', $spec)) {
            if (!is_numeric($spec->cost_price)) {
                return false;
            }
        } else {
            return false;
        }
    }

    return true;
}

public function message()
{
    return '规格设置不正确!请确认规格名称、价格及成本价设置正确。';
}

app/Http/Requests/ProductRequest.php

use App\Rules\SpecFieldRequired;

public function rules()
{
    return [
        'specifications'  => ['required', new SpecFieldRequired],
    ];
}

用户体验更好的一种方式

我一直觉得校验是最后一道防线,但不是最好的体验。最好的体验应该是直观地告诉用户,让用户明白哪些是需要注意的。所以,增加提示信息是必要的。

'columns' => [
    'name'  => '名称 (必填)',
    'price' => '销售价格(元) (必填)',
    'cost_price' => '成本价 (必填)',
    'original_price' => '原价 (选填)',
],
"hint" => "提示:1. 请至少添加一个默认规格。2. 名称,销售价格,成本价为必填项;原价为选填。",

Laravel 数据校验系列

参考

https://laravel.com/docs/5.5/validation#custom-validation-rules

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