file upload validation in kohana 3.1 not working

I am stuck with file upload validation in Kohana 3.1. Though the Upload::not_empty function returning false. I am still getting true from ch开发者_JAVA百科eck() function.

Here is my code

$validator = Validation::factory($this->request->post())
        ->rule('name', 'Upload::not_empty', array(':files'))
        ->bind(':files',$_FILES['name']);

var_dump($validator->check());

Above the name is the name of the file field.

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I solved this by combining $_POST and $_FILES as suggested by awellis in this thread.

Basically the value of field name was not passed in Validation::factory so the below code in Kohana_Validation's check() function was not returning the error.

// Ignore return values from rules when the field is empty
if ( ! in_array($rule, $this->_empty_rules) AND ! Valid::not_empty($value))
    continue;