使用动态选项在cakephp中搜索过滤器

I want to apply search filters in my project. I have options tables where options are being saved with the option values with parent id of option id. For example brand is saving as option with parent id set to 0 and all brands have brand id as their parent id set and while saving product I am saving product options in product_options table. Now i want to apply filters in product listing page. I am using following code for filtration:

$conditions = array();
$product_options = $this->ProductOption->find('list',array('fields'=>array('product_id'),'conditions'=>array('ProductOption.option_value_id'=>$data['data']['options'])));

$conditions = array_merge($conditions,array('Product.id'=>array_unique($product_options)));
$prod_info = $this->paginate('Product',$conditions);
$this->set(compact('prod_info'));   

When I search any product with their brand name it works fine but if I try to search with the price (also an option) then it gives other brand products also which have price equal to filter price option. Please check following link to understand problem correctly.

http://primemart.in/Food-Processors-Ii4zRGAKYAo=

Please anyone help me to come out my problem. Thanks.

Please have a look on my code which I used to pass conditions in and to get results

$product_options = $this->ProductOption->find('list',array(
    'fields'=>array('product_id'),
    'conditions'=>array('ProductOption.option_value_id'=>$data['data']['options'])
));
//$this->Option->unBindModel(array('belongsTo'=>'Product'));
$product_options = $this->Option->find('all', array(
    'conditions'=>array('Option.id'=>$data['data']['options'])
));
//pr($product_options);
$opt_arr = array();

foreach ($product_options as $op) {
    $opt_arr[$op['Option']['parent_id']][] = $op['Option']['id'];
}
$conditions_arr = array();  

foreach($opt_arr as $opt) {
    $key_arr = array();
    foreach($opt as $op) {
        $key_arr['OR']['ProductOption.option_value_id'][] = $op;                        
    }
    $conditions_arr['AND'][] = $key_arr;
}                   
$pr_options = $this->ProductOption->find('list', array(
    'conditions'=>$conditions_arr,
    'fields'=>array('product_id')
));                 
$conditions = array_merge($conditions, array('Product.id'=>array_unique($pr_options))); 

I would try code bellow. I assume that $conditions constist of the other conditions you mention in your question.

$conditions = ... // other conditions you mentioned 

$conditions = array('AND'=>array($conditions, array('Product.id'=>array_unique($product_options))));
$prod_info = $this->paginate('Product',$conditions);