如何在Laravel中手动返回或引发验证错误/异常? [英] How can I manually return or throw a validation error/exception in Laravel?

问题描述

具有将CSV数据导入数据库的方法.我使用

Have a method that's importing CSV-data into a Database. I do some basic validation using

class CsvImportController extends Controller
{
    public function import(Request $request)
    {   
        $this->validate($request, [
            'csv_file' => 'required|mimes:csv,txt',
        ]);

但是在那之后，由于更复杂的原因，事情可能会出错，在兔子洞的更深处，这会引发某种异常.我无法在此处编写与validate方法一起使用的正确的验证内容，但是，我真的很喜欢验证失败时Laravel的工作方式，以及将错误嵌入到刀片视图中的难易程度，等等. ..

But after that things can go wrong for more complex reasons, further down the rabbit hole, that throws exceptions of some sort. I can't write proper validation stuff to use with the validate method here, but, I really like how Laravel works when the validation fails and how easy it is to embed the error(s) into the blade view etc, so...

是否有一种(最好是干净的)方式来手动 告诉Laravel:我知道我现在没有使用您的validate方法，但是我真的很希望您公开此错误好像我做到了吗?"有什么我可以返回的东西，可以包装的异常之类的东西吗?

Is there a (preferably clean) way to manually tell Laravel that "I know I didn't use your validate method right now, but I'd really like you to expose this error here as if I did"? Is there something I can return, an exception I can wrap things with, or something?

try
{
    // Call the rabbit hole of an import method
}
catch(\Exception $e)
{
    // Can I return/throw something that to Laravel looks 
    // like a validation error and acts accordingly here?
}

推荐答案

从laravel 5.5开始，

As of laravel 5.5, the ValidationException class has a static method withMessages that you can use:

$error = \Illuminate\Validation\ValidationException::withMessages([
   'field_name_1' => ['Validation Message #1'],
   'field_name_2' => ['Validation Message #2'],
]);
throw $error;

我还没有测试过，但是应该可以.

I haven't tested this, but it should work.

更新

消息不必包装在数组中.您也可以这样做:

The message does not have to be wrapped in an array. You can also do:

use Illuminate\Validation\ValidationException;

throw ValidationException::withMessages(['field_name' => 'This value is incorrect']);

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