I am going through an issue to setup a file upload validator on callback.

I want to achieve this:

I have a form, where user choose the type of the file they are uploading and upload the file. So I want to set the validator to handle images in case they chose "img" as type, and pdf if they chose "pdf".

Moreover I want to specify the mime type and path and validatedFileClass according to the type.

I tried this.. but i can t get it to work

$this->validatorSchema->setPostValidator( new sfValidatorCallback(array( callback => array($this, validateUploadedFiles ))) );

the function:

      public function validateUploadedFiles($form_validator, $values){

    $this_year = date("Y");
    $this_month = date("m");

    $basic_validator = array(
     required  => true,
     path  => sfConfig::get( sf_upload_dir ). restaurant/media/ .$this_year. / .$this_month. / 
    );

    $doc_validator = $video_validator = $img_validator = $pdf_validator = $basic_validator;
    $pdf_validator[ mime_types ] = array ( application/pdf );
    $doc_validator[ mime_types ] = array ( application/msword ,  application/vnd.openxmlformats );
    $img_validator[ mime_types ] =  web_images ;
    //$img_validator[ validated_file_class ] =  imgHandling ;
    $video_validator[ mime_types ] = array( video/mpeg ,  video/3gpp ,  video/mp4 ,  video/quicktime );

    switch( $values[ type ] ):
       case  pdf  : $validator = $pdf_validator; break;
       case  img  : $validator = $img_validator; break;
       case  word  : $validator = $doc_validator; break;
       case  video  : $validator = $video_validator; break;
    endswitch; 


    //$form->getValidatorSchema()->offsetUnset( url ) ;
    //print_r($validator_fields);
    $validator = new sfValidatorFile( $validator );
    $validator_schema = new sfValidatorSchema();
    $validator_schema->offsetSet( url , $validator);
   //$validator_fields = $form->getValidatorSchema()->getFields();    


    $schema = parent::getValidatorSchema();
    $schema->offsetUnset( url ) ;
    $schema->offsetSet( url , $validator);


   // $path = sfConfig::get( sf_upload_dir ). restaurant/media/ .$this_year. / .$this_month. / ;
   // $values[ url ] = new sfValidatedFile( $values[ url ][ name ], $values[ url ][ type ], $values[ url ][ tmp_name ], $values[ url ][ size ] , $path);

     //TODO get this url value run through the new added validator
    //$values[ url ] = $validator_schema->clean(array(  url  => $values[ url ] ));

    return $values;

  }

the problem i am facing is that , this function receives the url value as array, and even if I update the validators schema, it s not validating the url and keeps on sending it as array to the object saving method. So how to make something like

url.validateFile() from inside this function