gistfile1.txt

// NB - Activity is a subclass of an Eloquent Model
class Exercise extends Activity
{
    public function details()
    {
        return $this->morphTo('details', 'details_type', 'id');
    }   
}


// ... as doe the parent class here...
class HotspotExerciseDetails extends ExerciseDetails
{
    public function images()
    {
        return $this->hasMany('HotspotImage', 'hotspot_exercise_detail_id');
    }
}


class HotspotImage extends Eloquent
{
}