删除前的模型回调

我试图在使用级联模型删除这些图像的容器时删除图像::delete

级联工作正常，但我无法在删除后回调模型以正常工作，因此我可以在删除时删除实际的图像文件。

function beforeDelete() {
    $containerId = $this->id;
    $numberOfImages = $this->RelatedImage->find('count', array('conditions' => array('RelatedImage.container_id' => 'containerId')));
    if ($numberOfImages > 0){   
        $relatedImages = $this->RelatedImage->find('all', array('conditions' => array('RelatedImage.container_id' => 'containerId')));
        foreach ($relatedImages as $image) {
            $myFile = WWW_ROOT . 'image' . $containerId . '_i' . $image['RelatedImage']['id']  . '.jpg';
            unlink($myFile);
            $myThumb = WWW_ROOT . 'img/' . $image['RelatedImage']['thumbnail'];
            unlink($myThumb);
        }
        return true;
    } else{
        return false;
    }
}

即使我知道表中有图像，if 语句每次都会失败。如果我能让 if 语句至少执行，我将在取消链接上添加进一步的验证。

我会这样做：

在beforeDelete中获取图像数据

function beforeDelete(){
  $relatedImages = $this->RelatedImage->find('all', array('conditions' => array('RelatedImage.container_id' => 'containerId')));
  $this->relatedImages = $relatedImages;
  $this->currentId = $this->id; //I am not sure if this is necessary
  return true;
}

然后按照奥斯卡的建议在 afterDelete() 中实际删除图像：

function afterDelete(){
  $relatedImages = $this->relatedImages;
  $containerId = $this->currentId; //probably this could be just $this->id;
  foreach ($relatedImages as $image) {
        $myFile = WWW_ROOT . 'image' . $containerId . '_i' . $image['RelatedImage']['id']  . '.jpg';
        unlink($myFile);
        $myThumb = WWW_ROOT . 'img/' . $image['RelatedImage']['thumbnail'];
        unlink($myThumb);
    }
}

这样你就可以保存，即使模型无法删除记录，只有在实际发生删除的情况下，你才会删除图像。

HTH