Question

I have the following code in my model:

var $name = 'Product';            
    var $hasMany = array(
        'AttachedProduct' => array(
            'className'     => 'AttachedProduct',
            'foreignKey'    => 'product_id'
        ),
        'Sale' => array(
            'className'     => 'Sale',
            'foreignKey'    => 'item_id',
            'fields'    => 'Sale.peso_value'
        )
    );  

I want to use the Sale part only. Currently when I query my Products model the ‘AttachedProduct’ is also returned. I want only the Sale records to be returned.

Thanks for any help! 🙂

Answer 1

The relationships in a model like hasMany and belongsTo are just possible definitions. You can choose which ones you want to return when doing a find() with something called the Containable behavior. Check out the docs for details.

You start by adding the behavior to your Product model:

class Product extends AppModel {
    public $actsAs = array('Containable');  // add this line
    ...
}

Then when you want to query for your Products, you put the hasMany relationships that you want to return in the contain() method before the find().

$this->Product->contain('Sales');
$products = $this->Product->find('all', ...);

Then you’ll only have the Products and associated Sales.