Yii2：结合Kartik的FileInput和Kartik的DetailView

Question

我正在尝试使用Kartik的FileInput上传单文件。

通过标准创建表单执行此操作时一切正常，因为以下内容返回非空：

$filedata = UploadedFile::getInstance($model, 'filedata'); 

但是，当以编辑模式进入Kartik的详细视图并尝试更新文件时，它总是返回null。

view.php我有：

[
    'attribute' => 'filedata',
    'visible' => Yii::$app->user->can('doIt'),
    'type' => DetailView::INPUT_FILEINPUT,
    'rowOptions' => ['class' => 'kv-view-hidden'],
    'widgetOptions' => ['options' => ['accept' => 'application/pdf'],
    'pluginOptions' => [
        'showUpload' => false,
        'allowedFileExtensions' => ['pdf'],
        'initialCaption' => $model->filename,
    ],
    'pluginEvents' => [
        'filecleared' => <whatever>,
        'fileloaded'  => <whatever>,
    ],
  ],
],   

在_form.php（确实有效）中：

<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]); ?>
    <?= $form->field($model, 'filedata')->widget(FileInput::classname(), [
        'options' => ['accept' => 'application/pdf'],
        'pluginOptions' => [
            'showUpload' => false,
            'allowedFileExtensions' => ['pdf'],
            'initialCaption' => $model->getOldAttribute('filename'),
        ],
        'pluginEvents' => [
            'filecleared' => <whatever>,
            'fileloaded'  => <whatever>,
        ],
    ]) 
?>

有什么想法吗？（顺便说一句，不知道'multipart/form-data'是否需要view.php，因为它在_form.php中，所以任何确认这一点并提供一些细节的人都应该受到欢迎）。

Answer 1

当然，在_form.php和view.php中也需要多部分/表单数据，如下所示：

'formOptions' => ['options' => ['enctype' => 'multipart/form-data']],
'attributes' => [
...
[
    'attribute' => 'filedata',
    'visible' => Yii::$app->user->can('doIt'),
    'type' => DetailView::INPUT_FILEINPUT,
    'rowOptions' => ['class' => 'kv-view-hidden'],
    'widgetOptions' => ['options' => ['accept' => 'application/pdf'],
    'pluginOptions' => [
        'showUpload' => false,
        'allowedFileExtensions' => ['pdf'],
        'initialCaption' => $model->filename,
    ],
    'pluginEvents' => [
        'filecleared' => <whatever>,
        'fileloaded'  => <whatever>,
    ],
  ],
],
....
]