2

我试图在创建和更新时验证模型中具有有效扩展名的 cakephp 中的文件字段尝试仅在字段不为空时验证文件。在创建验证工作正常，但在更新时它验证 if 字段为空。我想仅在字段不为空时验证扩展这是我在模型验证数组中的验证规则

'image' => array(
        'rule1'=>array(
            'rule' => array('extension',array('jpeg','jpg','png','gif')),
            'required' => 'create',
            'allowEmpty' => true,
            'message' => 'Select Valid Image',
            'on' => 'create',
            'last'=>true
        ),
        'rule2'=>array(
            'rule' => array('extension',array('jpeg','jpg','png','gif')),
            //'required' => 'create',
            'allowEmpty' => true,
            'message' => 'Select Valid Image',
            'on' => 'update',
        ),
    ),
4

2 回答 2

4

这是验证创建时需要的图像字段的正确方法，并且可以在更新图像字段时允许为空

图像字段验证数组

'image' => array(
    'rule1'=>array(
        'rule' => array('extension',array('jpeg','jpg','png','gif')),
        'required' => 'create',
        'allowEmpty' => true,
        'message' => 'Select Valid Image',
        'on' => 'create',
        'last'=>true
    ),
    'rule2'=>array(
        'rule' => array('extension',array('jpeg','jpg','png','gif')),
        'message' => 'Select Valid Image',
        'on' => 'update',
    ),
),

并在更新操作的 beforevalidation 中取消设置 image 字段

function beforeValidate($options = array()){
    if(empty($this->data[$this->alias]['id']))
    {
        return true;
    }
    else
    {
        if(empty($this->data[$this->alias]["image"]["name"])){
        unset($this->data[$this->alias]["image"]);
        }
        return true; //this is required, otherwise validation will always fail
    }
}
于 2013-05-31T06:54:27.533 回答
1

我们可以通过自定义验证来做到这一点，如下所示

public $validate =array(
    'image' => array(
        'rule' => array('checkValidImage'),
        )
    );


 public function checkValidImage($field)
      {

        $extension = array('image/gif', 'image/jpeg', 'image/pjpeg', 'image/x-png', 'image/png', 'image/jpg');
        $isValidFile = in_array($field['new_image']['type'], $extension);
        $errors = array();
        $editMethod = false;
        if(!empty($this->data['ModelName']['id'])) // It will work for Update Method
        {
          if(!empty($this->data['ModelName']['image']['name'] ))
          {
            if (($field['image']['error'] == 1)) 
            {
                $errors [] = "Please upload jpg,png or gif files with size 2 MB.";
            }
            else if (empty($field['image']['name']))
            {
                $errors [] = "Please upload image";
            } 
            else if ($field['image']['size'] >= 2097152) {
                $errors [] = "Please upload jpg,png or gif files with size 2 MB.";
            }
            else if ($isValidFile !=1)
            {

                $errors [] = "Please select file in gif,jpeg,png format.";
            }

          }else
                {
                    $errors [] = "Please select file in gif,jpeg,png format.";
                }

        }
        else
        {
            if(!empty($this->data['ModelName']['image']['name'] )) // It will work for Create Method
            {
                if (($field['image']['error'] == 1)) 
                {
                    $errors [] = "Please upload jpg,png or gif files with size 2 MB.";
                }
                else if (empty($field['ModelName']['name']))
                {
                    $errors [] = "Please upload image";
                } 
                else if ($field['ModelName']['size'] >= 2097152) {
                    $errors [] = "Please upload jpg,png or gif files with size 2 MB.";
                }
                else if (!(in_array($field['image']['type'], $extension)))
                {
                    $errors [] = "Please select file in gif,jpeg,png format.";
                }

            }



        }

        if (!empty($errors))
        {
            return implode("\n", $errors);
        }
        return true;
    }
于 2013-05-16T12:55:26.000 回答