validate domain denote list (cakephp)

i've got denote cakephp doesn't have table, called upload. i've got validation denote domain called source_id.

i've got form builds good looking $this-data, giving me good formated set, including:

$this->data['upload']['source_id']

however, validation order i have set doesn't seem run during all. i copied validation order another denote where does work, i'm positive works:

var $validate = array(
        'source_id' => array(
        rule' => 'numeric',
        'required' => true,
        'allowempty' => false,
        'message' => 'error!.'
    )
);

can countenance fields denote lacks database table?

the form uses upload model, submits another controller movement method.

cakephp 1.2, php/mysql 5, xampp.