cakePHP可选验证文件上传 [英] cakePHP optional validation for file upload

问题描述

如何将文件上传为可选的验证？
即使我没有选择任何文件，下面的代码也会验证。
我想检查扩展名，只有当我选择了该文件。
如果我不选择任何文件，它不应该返回任何验证错误。

  class Catalog extends AppModel {
 var $ name ='Catalog'; 
 var $ validate = array（
'name'=> array（
'rule'=>'/ ^ [a-z0-9] {0，} $ / i' ，
'allowEmpty'=> false，
'message'=>'无效的目录名称'
），
'imageupload'=& 'rule'=> array（'extension'，array（'jpeg'，'jpg'，'png'，'gif'）），
'required'=> false，
'allowEmpty '=> true，
'message'=>'无效的文件'
），
）;提前感谢

  

$ b html]'[$''''= $ this-> data'''''''''''' imageupload'] ['name'];

所以当你保存数据数组时， ：

  array（
'image'=>'foobar'，
'imageupload'=> ; array（
'name'=>'foobar'，
'size'=> 1234567，
'error'=> 0，
 ... 
 
）
  

这意味着 imageupload 验证规则正在尝试处理此数据：

 数组（
'name'=> ;'foobar'，
'size'=> 1234567，
'error'=> 0，
 ... 
）
  

它试图验证的值是一个数组的东西，而不只是一个字符串。这不太可能通过指定的验证规则。它也可能永远不是空。

您可以创建一个可以处理此数组的自定义验证规则，或者您需要在尝试之前在控制器中进行一些更多的处理以验证它。

How to make file uploading as optional with validation? The code below validates even if i didn't selected any file. I want to check the extension only if i selected the the file. If i am not selecting any file it should not return any validation error.

class Catalog extends AppModel{
    var $name = 'Catalog';
    var $validate = array(
        'name' => array(
            'rule' => '/^[a-z0-9 ]{0,}$/i',
            'allowEmpty' => false,
            'message' => 'Invalid Catalog name'
        ),
        'imageupload' => array(
            'rule' => array('extension',array('jpeg','jpg','png','gif')),
            'required' => false,
            'allowEmpty' => true,
            'message' => 'Invalid file'
        ),
       );
}

thanks in advance

解决方案

"I assign $this->data['Catalog']['image'] = $this->data['Catalog']['imageupload']['name'];"

So by the time you save your data array, it looks something like this I assume:

array(
    'image' => 'foobar',
    'imageupload' => array(
        'name' => 'foobar',
        'size' => 1234567,
        'error' => 0,
        ...
     )
)

Which means, the imageupload validation rule is trying to work on this data:

array(
    'name' => 'foobar',
    'size' => 1234567,
    'error' => 0,
    ...
 )

I.e. the value it's trying to validate is an array of stuff, not just a string. And that is unlikely to pass the specified validation rule. It's also probably never "empty".

Either you create a custom validation rule that can handle this array, or you need to do some more processing in the controller before you try to validate it.

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