laravel-admin如何上传图片以及出现的错误和解决办法

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'upload' => [
// Disk in `config/filesystem.php`.
'disk' => 'admin',
// Image and file upload path under the disk above.
'directory' => [
'image' => 'images',
'file'
=> 'files',
],
],

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/*
|--------------------------------------------------------------------------
| Filesystem Disks
|--------------------------------------------------------------------------
|
| Here you may configure as many filesystem "disks" as you wish, and you
| may even configure multiple disks of the same driver. Defaults have
| been setup for each driver as an example of the required options.
|
| Supported Drivers: "local", "ftp", "sftp", "s3", "rackspace"
|
*/
'disks' => [
'local' => [
'driver' => 'local',
'root' => storage_path('app'),
],
'public' => [
'driver' => 'local',
'root' => storage_path('app/public'),
'url' => env('APP_URL').'/storage',
'visibility' => 'public',
],
's3' => [
'driver' => 's3',
'key' => env('AWS_ACCESS_KEY_ID'),
'secret' => env('AWS_SECRET_ACCESS_KEY'),
'region' => env('AWS_DEFAULT_REGION'),
'bucket' => env('AWS_BUCKET'),
'url' => env('AWS_URL'),
],
'admin' => [
'driver'
=> 'local',
'root'
=> public_path('upload'),
'visibility' => 'public',
'url' => env('APP_URL').'/public/upload/',
],
],

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protected function form()
{
$form = new Form(new Brand());
//$form->number('row', __('Row'));
$form->text('brand_name', __('Brand name'));
$form->text('desc', __('Desc'));
//
$form->text('logo', __('Logo'));
$form->image('logo',__('封面图'))
->thumbnail('small', $width = 300, $height = 300)->removable();
$form->number('sort', __('Sort'))->default(1);
return $form;
}

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'providers' => [
InterventionImageImageServiceProvider::class,
],
'aliases' => [
'Image' => InterventionImageFacadesImage::class,
],