Laravel使用闭包验证 [英] Laravel validation Using Closures

问题描述

使用Laravel 5.4开发我正在尝试Laravel文档中的示例:

Developing with Laravel 5.4 I am trying the example from Laravel documentation:

$validator = Validator::make($request->all(), [
'title' => [
    'required',
    'max:255',
    function($attribute, $value, $fail) {
        if ($value === 'foo') {
            return $fail($attribute.' is invalid.');
        }
    },
],

]);

我收到此错误:

关闭类的对象无法转换为字符串

Object of class Closure could not be converted to string

为什么?

推荐答案

在5.4中，如果您不希望使用闭包，则可以在验证规则之后通过它，如下所示:

In 5.4 if you wan't a closure you can pass it after the validation rules, like this:

$validator = Validator::make($request->all(), [
    'title' => ['required', 'max:255'],
]);

$validator->after(function ($validator) {
    if ($request->get('field') === 'foo') {
        $validator->errors()->add('field', 'Field is invalid.');
    }
});

if ($validator->fails()) {
    //
}

这篇关于Laravel使用闭包验证的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！