Laravel请求验证正则表达式，无需 [英] Laravel Request Validation Regex without Required

问题描述

我对请求验证有疑问.一切正常，但只有一种模式.如果我不希望该字段为必填字段，但一旦填写完毕，我希望它匹配一个正则表达式.

I have a problem with Request validation. Everything works but one pattern. And its if I dont want the field to be required but once it is filled I want it to match a regex.

但是当我将该字段留空时，它将引发正则表达式错误.

But it throws regex error when I leave the field empty.

有关如何处理的任何提示? 顺便说一句:我做了一个自定义的Request类，负责验证工作，因此，如果解决方案也可以出现在Request中，而不是直接出现在Controller中，那就太好了.

Any tips on how I should handle it? BTW: I made a custom Request class where I take care of the validation so if the solution could be also in the Request and not directly in Controller that would be great.

return [
    'dic' => 'max:12|regex:/^[a-zA-Z]{2}[0-9]{8}[0-9]*$/',
];

推荐答案

return [
    'dic' => 'nullable|max:12|regex:/^[a-zA-Z]{2}[0-9]{8}[0-9]*$/',
];

nullable在该字段为空时不会检查其他规则.

nullable won't check the other rules when the field is empty.

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