public function findActivityImageUrlsByActivityIds(array $actvityIds)
{
$query = new opDoctrineQuery();
$query->select('activity_data_id, uri');
$query->from('ActivityImage');
$query->andWhereIn('activity_data_id', $actvityIds);
$searchResult = $query->fetchArray();
$imageUrls = array();
foreach ($searchResult as $row) {
$imageUrls[$row['activity_data_id']] = $row['uri'];
}
return $imageUrls;
}
