Question

I am using the tree behavior and when I query via ->find(‘threaded’, …) – as expected – I get the tree back.

But I want additional joins happen, so something like:

$data = $this->Category->find('threaded', array(
    'joins' => array(
        array('table' => 'videos',
            'alias' => 'Video',
            'type' => 'LEFT',
            'conditions' => array(
                'Category.id = Video.category_id',
            )
        )
    )
));

Category hasMany Video, but Video is not a tree, just related.

Can I use the threaded query for that?

Answer 1

To produce the “threaded” output Cake 1) calls a find(‘all), then 2) puts the resulting array through Set::nest() function.

So just get your output using a standard find + your custom joins, then just use the Set::nest

(NB: Hash has replaced Set in Cake 2, but Cake still uses Set internally. Both will work for now. Hash::nest )

So if you take a look at Cake’s model.php, the nest function is called like so:

return Set::nest($results, array(
            'idPath' => '/' . $this->alias . '/' . $this->primaryKey,
            'parentPath' => '/' . $this->alias . '/' . $parent
        ));

Use that as a template for your call. For your data it would look something like:

return Set::nest($results, array(
            'idPath' => '/Category/id',
            'parentPath' => '/Category/parent_id'           ));