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希望这是一个简单的问题。

我有一个 Cakephp MVC 设置来上传图像并将其存储在数据库表中。索引、视图和添加按我的意愿工作。

但是，在“编辑”视图中，我如何指示该记录当前有一个上传的图像，我可以用它来保持更改。

我无法弄清楚在文件输入按钮的属性中设置什么来显示现有文件名。

<div class="imageEdit form">
<?php
    echo $this->Form->create('VwImage', array('action' => 'edit', 'type' => 'file') );
    echo $this->Form->input('image_category', array(
        'options' => $partCat,
        'selected' => $this->data['VwImage']['image_category'],
         'type'=>'select', 'empty' => '(Choose One)'));
    echo $this->Form->input('description');         
    echo $this->Form->input('image', array( 'value' => $this->data['VwImage']['file_name'],
                        'type' => 'file'));

    echo $this->Form->submit('Save');
    echo $this->Form->end();
?>

控制器代码编辑

    public function edit( $id = null) {

    $this->loadModel('VwPartsCategory');
    $partCat= $this->VwPartsCategory->find('list',
                array( 'order' => 'short_name ASC' )); // Get parts categories from the database
    $this->set('partCat', $partCat);

    if(!$id && empty($this->request->data)) {
        $this->Session->setFlash('Invalid Id for Image');
        $this->redirect(array('action' => 'index'));
    } 

    if (!empty($this->request->data) &&
        is_uploaded_file($this->request->data['VwImage']['image']['tmp_name'])) {

        $fileData = fread(fopen($this->request->data['VwImage']['image']['tmp_name'], "r"),
                $this->request->data['VwImage']['image']['size']);

        /** get image information **/
        $size = getimagesize($this->request->data['VwImage']['image']['tmp_name']);
        $image_width = $size[0];
        $image_height = $size[1];
        $image_size = $size[3];
        $image_type = $size['mime'];
        $image_thumb = null;

        /** Create a second variable for the thumbnail **/
        $thumb_data = $this->request->data['VwImage']['image']['tmp_name'];
        $aspect_ratio = (float) ($image_width / $image_height );
        $thumb_height = 100;
        $thumb_width = $thumb_height * $aspect_ratio;
        if($image_type == 'image/jpeg' ) {
            $src = ImageCreateFromjpeg($thumb_data);
            $destImage = ImageCreateTrueColor($thumb_width, $thumb_height);
            ImageCopyResampled($destImage, $src, 0,0,0,0, $thumb_width, $thumb_height, $image_width, $image_height);
            ob_start();
            imageJPEG($destImage);
            $image_thumb = ob_get_contents();
            ob_end_clean();
        }
        if($image_type == 'image/gif' ) {
            $src = ImageCreateFromgif($thumb_data);
            $destImage = ImageCreateTrueColor($thumb_width, $thumb_height);
            ImageCopyResampled($destImage, $src, 0,0,0,0, $thumb_width, $thumb_height, $image_width, $image_height);
            ob_start();
            imageJPEG($destImage);
            $image_thumb = ob_get_contents();
            ob_end_clean();
        }
        if($image_type == 'image/png' ) {
            $src = ImageCreateFrompng($thumb_data);
            $destImage = ImageCreateTrueColor($thumb_width, $thumb_height);
            ImageCopyResampled($destImage, $src, 0,0,0,0, $thumb_width, $thumb_height, $image_width, $image_height);
            ob_start();
            imageJPEG($destImage);
            $image_thumb = ob_get_contents();
            ob_end_clean();
        }


        $this->request->data['VwImage']['file_name'] = $this->request->data['VwImage']['image']['name'];
        $this->request->data['VwImage']['file_type'] = $this->request->data['VwImage']['image']['type'];
        $this->request->data['VwImage']['size'] = $this->request->data['VwImage']['image']['size'];                 
        $this->request->data['VwImage']['image'] = $fileData;
        $this->request->data['VwImage']['id'] = $id;

        if(!$image_thumb == null) {
            $this->request->data['VwImage']['image_thumb'] = $image_thumb;
            $this->request->data['VwImage']['thumb_height'] = $thumb_height;
            $this->request->data['VwImage']['thumb_width'] = $thumb_width;
            if ($this->VwImage->save($this->request->data)) {
                $this->Session->setFlash('This image has been save');
                $this->redirect(array('action' => 'index'));
            } else {
                $this->Session->setFlash('This Image could not be saved. Please try again.');
            }
        } else {

            $this->Session->setFlash('Unsupported Image Type could not be saved. Please try again.');
        }           
    }
    if (empty($this->request->data)) {
        $this->request->data = $this->VwImage->read(null, $id);
    /** pr($this->request->data); die; **/
    }
}

干杯迈克

4

1 回答 1

1

问题：

根据CakePHP 2.0 书：

由于 HTML 本身的限制，不可能将默认值放入“文件”类型的输入字段中。每次显示表单时，里面的值都会为空。

虽然我确定有办法破解它（使用 javascript），但尝试在该字段中设置默认值是非标准做法。当您通过“文件”输入选择文件时，它会插入本地文件的路径。你怎么知道那是什么路径？

解决方案：

相反，在上面或下面添加一行显示“上一个文件名”及其文件名，或者如果它是图像，则显示上一个文件的缩略图。

于 2015-06-09T13:50:59.683 回答