patchEntity()为什么会剪切图像信息?(CakePHP3)

在修补/创建实体时,数据将根据相应的列数据类型进行编组,如您可以看到的其他属性,如 price ,它从字符串转换为浮点。

你的 img 列可能是字符串类型,导致封送拆收器相应地转换数据(请参见 \Cake\Database\Type\StringType::marshal() ).

有多种方法可以避免这种情况,例如使用不映射到现有列的不同属性名,如 img_upload ,然后在移动上载后,手动将生成的文件系统路径设置为 img公司 属性并保存该属性。

这也可以在 beforeMarshal 您的 ProductsTable 类,以便视图模板可以继续使用 img公司 属性:

public function beforeMarshal(
    \Cake\Event\Event $event,
    \ArrayObject $data,
    \ArrayObject $options
) {
    if (isset($data['img'])) {
        $data['img_upload'] = $data['img'];
        unset($data['img']);
    }
}

您还可以为 img公司 列,它不会将数据封送到字符串,而只是将其传递:

namespace App\Database\Type;

use Cake\Database\Type;

class FileType extends Type
{
    public function marshal($value)
    {
        return $value;
    }
}

无论如何,您都必须分配文件系统路径,基本上只需避免使用单独的/临时属性即可。

另请参见

• Cookbook > Database Access & ORM > Saving Data > Modifying Request Data Before Building Entities
• Cookbook > Database Access & ORM > Database Basics > Adding Custom Types

我不知道这在多大程度上是正确的,但最终我做到了以下几点,一切都按照我的需要进行:

产品内控制器 :

 public function add()
{
    $product = $this->Products->newEntity();

    if ($this->request->is('post')) {
        $data = $this->request->getData();

        $product = $this->Products->patchEntity($product, $data);

        // If there is a picture that we checked (by the method of validationDefault, when calling patchEntity) and have already uploaded to the server in a temporary folder, then
        if($product->img_upload['name']){
            // We call the user method of processing the downloaded image
            $product = $this->_customUploadImg($product);
            // Leave only the name of the new file, adding it to the new property, with the name corresponding to the name of the table in the database
            $product->img = $product->img_upload['name'];
        }
        // Delete an unnecessary property
        unset($product->img_upload);

        if ($this->Products->save($product)) {
            // ...
        }
    // ...
}

在产品中。php:

    class Product extends Entity{
    protected $_accessible = [
        'category_id' => true,
        'title' => true,
        'body' => true,
        'price' => true,
        'is_new' => true,
        'created' => true,
        'modified' => true,
        'category' => true,

        // 'img' => true,
        // Here we specify not 'img' as in the database table, but 'img_upload', in order for ProductsController not to delete our data file about the uploaded file when patchEntity was called.
        'img_upload' => true,
    ];
}

在ProductsTable中。php :

public function validationDefault(Validator $validator)
{
    //...

     $validator
        ->allowEmpty('img_upload', 'create')
        ->add('img_upload', [
            'uploadError' => [
                'rule' => 'uploadError',
                'message' => 'Error loading picture'
            ],
            'mimeType' => [
                'rule' => ['mimeType', ['image/jpeg', 'image/jpg', 'image/png', 'image/gif']],
                'message' => 'Only image files are allowed to be uploaded: JPG, PNG и GIF'
            ],
            'fileSize' => [
                'rule' => ['fileSize', '<=', '2MB'],
                'message' => 'The maximum file size should be no more than 2 MB'
            ]
        ]);

    //...
}

添加中。ctp公司 :

echo $this->Form->create($product, ['type' => 'file']) ?>
// ...
echo $this->Form->control('img_upload', ['type' => 'file', 'label'=>'Product photo']);
//...

感谢“ndm”和“mark”!