/**
* Sets main image of model
* @param $img
* @throws \Exception
*/
public function setMainImage($img)
{
if ($this->owner->{$this->idAttribute} != $img->item_id) {
throw new \Exception('Image must belong to this model');
}
$counter = 1;
/* @var $img Image */
$img->setMain(true);
$img->url_alias = $this->getAliasString() . '-' . $counter;
$img->save();
// set all other images related to this model and id to NOT be main
Image::updateAll(['is_main' => 0], ['and', ['model_name' => $img->model_name, 'item_id' => $img->item_id], ['not', ['url_alias' => $img->url_alias]]]);
$this->owner->clearImagesCache();
}
