SilverStripe UploadField文件自动重命名

Question

我已经做了一个表格在前端上传一些图片。我的想法是自动重命名所有文件上传到唯一的id。

我看过SilverStripe API，没有看到任何关于它的东西。UploadField API

这个是可能的吗？

Answer 1

下面是我的解决方案，在Silverstripe3.x中，我们必须用另一个类扩展UploadField。然后将‘saveTemporaryFile’函数复制到其中。

就在“尝试”之前，只需加上：

$ext = array_reverse(explode('.',$tmpFile['name'])); // explode filename into array, reverse array, first array key will then be file extension
$tmpFile['name'] = hash_hmac('sha256', $tmpFile['name'], '12345') . '.' . $ext[0];

结果：

class RandomNameUploadField extends UploadField {


protected function saveTemporaryFile($tmpFile, &$error = null) {

    // Determine container object
    $error = null;
    $fileObject = null;

    if (empty($tmpFile)) {
        $error = _t('UploadField.FIELDNOTSET', 'File information not found');
        return null;
    }

    if($tmpFile['error']) {
        $error = $tmpFile['error'];
        return null;
    }

    // Search for relations that can hold the uploaded files, but don't fallback
    // to default if there is no automatic relation
    if ($relationClass = $this->getRelationAutosetClass(null)) {
        // Create new object explicitly. Otherwise rely on Upload::load to choose the class.
        $fileObject = Object::create($relationClass);
    }

    $ext = array_reverse(explode('.',$tmpFile['name'])); // explode filename into array, reverse array, first array key will then be file extension
    $tmpFile['name'] = hash_hmac('sha256', $tmpFile['name'], '12345') . '.' . $ext[0];

    // Get the uploaded file into a new file object.
    try {
        $this->upload->loadIntoFile($tmpFile, $fileObject, $this->getFolderName());
    } catch (Exception $e) {
        // we shouldn't get an error here, but just in case
        $error = $e->getMessage();
        return null;
    }

    // Check if upload field has an error
    if ($this->upload->isError()) {
        $error = implode(' ' . PHP_EOL, $this->upload->getErrors());
        return null;
    }

    // return file
    return $this->upload->getFile();
}



}

谢谢@3 3dgoo给我的部分解决方案！

Answer 2

我现在并不是关于API的，但是有了一些代码，我就能够做到这一点。

你有两种可能性。

首先使用数据库。

第二，仅使用代码：

$directory = '/teste/www/fotos/';
$files = glob($directory . '*.jpg');

if ( $files !== false )
{
    $filecount = count( $files );
    $newid = $filecount+1;
    $new_name = "foto_".$newid;
    $target_file =  $directory."/".$new_name;
    move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file);

}
else
{
     $new_name = "foto_1";
     $target_file =  $directory."/".$new_name;
     move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file);
}

我的例子是jpeg，但是您可以查找hall类型。