multilevel association's and hasOne confusion..

Models:

Gallery hasMany Image

Image belongsTo Gallery

standard stuff.

I am attempting to automatically create a "GalleryCover" for easy access when outputting each gallery. So I did this:

// gallery model

public $hasOne = array(

'GalleryCover' =>array(

'className' => 'Image',

'foreignKey' => 'gallery_id',

'dependent' => false,

'conditions' => '',

'fields' => '',

'limit' => '1',

),

);

which makes sense to me.

I had then hoped to do:

foreach($galleries as $gallery) {

    echo $gallery['GalleryCover']['image']; // the "cover" image for this gallery.

}

however Cake is outputting each gallery twice; presumably of the other assocations, so obviously something isn't right.

I imagine this is just failing to understand hasOne and multiple associations properly.

Some guidance would be appreciated, and if there's a better way to achieve this please point me in the right direction. 

Thank you

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