How to define "global" find conditions for model in CakePHP? -

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is possible define find conditions effective in controllers , functions use specific model?

for example if want return products in stock no matter what. maybe somewhere in model: 

conditions => array('instock >' => 0)

i think try function on model, , call in controller simple line.

controller:

$productsinstock = $this->product->getproductsinstock();

model:

function getproductsinstock() {               $produtcsinstock = $this->find('all', array('conditions' => array('instock >' => 0)));             return $productsinstock;           }

or try link, think help. don't know nothing callbacks: http://book.cakephp.org/view/1049/beforefind


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