CakePHP data not saving and validation not working - validation

Question

When my model goes to validate my form
it always come as false,
it doesn't save in the database.
I dont understand why this isn't working, it was working until I unbind on a few of my functions.
Here is my invoice model, it's supposed to check if there is to/biller in relationships_users table (relationship model).
<?php
class Invoice extends AppModel{
var $name='Invoice';
public $belongsTo = array(
'Relationship' =>array(
'className' => 'Relationship',
'foreignKey' =>'relationship_id',
)
);
var $validate = array(
'to' => array(
'relationshipExists' => array(
'rule' => array(
'relationshipExists'),
'message' => 'sorry you dont have a relationship with that user.'
),
),
);
public function relationshipExists($check){
$relationshipExists=$this->Relationship->find('count', array(
'conditions' => array(
'Relationship.partyone' => current($check),
'Relationship.partytwo' => current($check)
// get the value from the passed var
)
)
);
if ($relationshipExists>0) {
return TRUE;
}
else
return FALSE;
}
Here is my function in the invoices table
public function addinvoice(){
$this->set('title_for_layout', 'Create Invoice');
$this->set('stylesheet_used', 'homestyle');
$this->set('image_used', 'eBOXLogoHome.jpg');
$this->layout='home_layout';
if($this->request->is('post')){
($this->Invoice->set($this->request->data));
if($this->Invoice->validates(array('fieldList'=>array('to','Invoice.relationshipExists')))){
$this->Invoice->save($this->request->data);
$this->Session->setFlash('The invoice has been saved');
}}else {
$this->Session->setFlash('The invoice could not be saved. Please, try again.');
}
}
What it's supposed to do is to check that to/biller are in the relationships_users table and then save the invoice to the invoice table, otherwise throw a message.

Answer 1

The conditions array seems strange to me:
'conditions' => array(
'Relationship.partyone' => current($check),
'Relationship.partytwo' => current($check)
// get the value from the passed var
)
That would search for Relationships with both partyone and partytwo set to to. You probably want to check if either of them is set to to:
'conditions' => array(
'OR' => array(
'Relationship.partyone' => current($check),
'Relationship.partytwo' => current($check)
)
// get the value from the passed var
)