我在Laravel应用程序中创建了一组自定义验证规则。我首先在validators.php
目录中创建了一个App\Http
文件:
/**
* Require a certain number of parameters to be present.
*
* @param int $count
* @param array $parameters
* @param string $rule
* @return void
* @throws \InvalidArgumentException
*/
function requireParameterCount($count, $parameters, $rule) {
if (count($parameters) < $count):
throw new InvalidArgumentException("Validation rule $rule requires at least $count parameters.");
endif;
}
/**
* Validate the width of an image is less than the maximum value.
*
* @param string $attribute
* @param mixed $value
* @param array $parameters
* @return bool
*/
$validator->extend('image_width_max', function ($attribute, $value, $parameters) {
requireParameterCount(1, $parameters, 'image_width_max');
list($width, $height) = getimagesize($value);
if ($width >= $parameters[0]):
return false;
endif;
return true;
});
然后我在我的AppServiceProvider.php
文件中添加此内容(同时在此文件的顶部添加use Illuminate\Validation\Factory;
):
public function boot(Factory $validator) {
require_once app_path('Http/validators.php');
}
然后在我的表单请求文件中,我可以调用自定义验证规则,如下所示:
$rules = [
'image' => 'required|image|image_width:50,800',
];
然后在位于validation.php
目录的Laravel resources/lang/en
文件中,如果验证返回false并失败,我将向数组中添加另一个键/值以显示错误消息,如下所示:
'image_width' => 'The :attribute width must be between :min and :max pixels.',
一切正常,它会正确检查图像,如果失败则显示错误消息,但我不知道如何用表单请求文件中声明的值替换:min
和:max
(50,800),同样的方式:attribute
被替换为表单字段名称。所以目前显示:
The image width must be between :min and :max pixels.
我希望它像这样显示
The image width must be between 50 and 800 pixels.
我在主replace*
文件Validator.php
中看到了一些(vendor/laravel/framework/src/Illumiate/Validation/)
函数,但我似乎无法弄清楚如何使用我自己的自定义验证规则。
答案 0 :(得分:11)
我还没有以这种方式使用它,但你可以使用:
$validator->replacer('image_width_max',
function ($message, $attribute, $rule, $parameters) {
return str_replace([':min', ':max'], [$parameters[0], $parameters[1]], $message);
});
答案 1 :(得分:1)
这是我使用过的解决方案:
在composer.json中:
"autoload": {
"classmap": [
"app/Validators"
],
在App / Providers / AppServiceProvider.php中:
public function boot()
{
$this->app->validator->resolver(
function ($translator, $data, $rules, $messages) {
return new CustomValidator($translator, $data, $rules, $messages);
});
}
在App / Validators / CustomValidator.php中
namespace App\Validators;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\Validator as Validator;
class CustomValidator extends Validator
{
// This is my custom validator to check unique with
public function validateUniqueWith($attribute, $value, $parameters)
{
$this->requireParameterCount(4, $parameters, 'unique_with');
$parameters = array_map('trim', $parameters);
$parameters[1] = strtolower($parameters[1] == '' ? $attribute : $parameters[1]);
list($table, $column, $withColumn, $withValue) = $parameters;
return DB::table($table)->where($column, '=', $value)->where($withColumn, '=', $withValue)->count() == 0;
}
// All you have to do is create this function changing
// 'validate' to 'replace' in the function name
protected function replaceUniqueWith($message, $attribute, $rule, $parameters)
{
return str_replace([':name'], $parameters[4], $message);
}
}
:name替换为此replaceUniqueWith函数中的$ parameters [4]
在App / resources / lang / en / validation.php
中<?php
return [
'unique_with' => 'The :attribute has already been taken in the :name.',
];
在我的控制器中,我将这个验证器称为:
$organizationId = session('organization')['id'];
$this->validate($request, [
'product_short_title' => "uniqueWith:products,short_title,
organization_id,$organizationId,
Organization",
]);
这就是我的形式:)