Error: Class Does not exist in Laravel

Error: Class Does not exist in Laravel

我遇到以下错误

InvalidArgumentExceptionFormBuilder.php 第 39 行: 名称为 App\Http\Controllers\App\Forms\SongForm 的表单 class 不存在。

于 Laravel、

SongsController.php class

<?php

namespace App\Http\Controllers;

use Illuminate\Routing\Controller as BaseController;
use Kris\LaravelFormBuilder\FormBuilder;

class SongsController extends BaseController {

    public function create(FormBuilder $formBuilder)
    {
        $form = $formBuilder->create(App\Forms\SongForm::class, [
            'method' => 'POST',
            'url' => route('song.store')
        ]);

        return view('song.create', compact('form'));
    }

    public function store(FormBuilder $formBuilder)
    {
        $form = $formBuilder->create(App\Forms\SongForm::class);

        if (!$form->isValid()) {
            return redirect()->back()->withErrors($form->getErrors())->withInput();
        }

        // Do saving and other things...
    }
}

SongForm.php

<?php

namespace App\Forms;

use Kris\LaravelFormBuilder\Form;

class SongForm extends Form
{
    public function buildForm()
    {
        $this
            ->add('name', 'text', [
                'rules' => 'required|min:5'
            ])
            ->add('lyrics', 'textarea', [
                'rules' => 'max:5000'
            ])
            ->add('publish', 'checkbox');
    }
}

routes.php

Route::get('songs/create', [
    'uses' => 'SongsController@create',
    'as' => 'song.create'
]);

Route::post('songs', [
    'uses' => 'SongsController@store',
    'as' => 'song.store'
]);

而且我不知道问题出在哪里,因为该文件存在于项目文件夹中。

错误解释

这里:

$form = $formBuilder->create(App\Forms\SongForm::class, [
        'method' => 'POST',
        'url' => route('song.store')
   ]);

您正在使用相对于当前命名空间的命名空间指定 class 名称:

App\Forms\SongForm::class

完整的 class 名称将从当前命名空间相对构建,即:

namespace App\Http\Controllers;

因此,您作为参数传递的 class 变为:

App\Http\Controllers\App\Forms\SongForm::class

class 不存在,所以你得到错误

如何解决

解决,可以指定绝对命名空间。改变这个:

App\Forms\SongForm::class

对此:

\App\Forms\SongForm::class

它应该可以工作