Dingo API 中 Request 如果验证成功会执行两次，如何解决？

原因找到了。因为框架和插件都使用了
vendor/laravel/framework/src/Illuminate/Foundation/Providers/FormRequestServiceProvider.php
vendor/dingo/api/src/Provider/LaravelServiceProvider.php

$this->app->afterResolving(ValidatesWhenResolved::class, function ($resolved) {
    $resolved->validateResolved();
});

$this->app->resolving(FormRequest::class, function ($request, $app) {
    $request = FormRequest::createFrom($app['request'], $request);

    $request->setContainer($app)->setRedirector($app->make(Redirector::class));
});

方案一

回滚到2.2.3版本

方案二

app.php

// Illuminate\Foundation\Providers\FoundationServiceProvider::class,
App\Providers\FoundationServiceProvider::class,

app/providers/FoundationServiceProvider.php

namespace App\Providers;

use Illuminate\Foundation\Providers\FoundationServiceProvider as LaravelFoundationServiceProvider;

class FoundationServiceProvider extends LaravelFoundationServiceProvider
{
    /**
     * The provider class names.
     *
     * @var array
     */
    protected $providers = [
        // FormRequestServiceProvider::class,
    ];
}

回退了还是不行

方案二，不对呢， 会报 Call to a member function call() on null

我重新clone了dinggo/api 封装了一个包放到github上了，也同步到composer中了，去掉了，已经解决了，需要的可以clone 我的包 composer require jameskid/dingo-api-fix-twice v1.0.0， github 地址 https://github.com/JamesKid/dingo-api-fix-...， 需要的可以把composer.json里的包改成我这个。