public function preUp()
 {
     $conn = Doctrine_Manager::getInstance()->getConnectionForComponent('CommunityeMember');
     $results = $conn->fetchAll('SELECT id, member_id, community_id, position from community_member where position <> ? AND position IS NOT NULL', array(''));
     foreach ($results as $result) {
         if (isset($result['position']) && $result['position'] && $result['position'] !== 'pre') {
             $communityMemberPosition = new CommunityMemberPosition();
             $communityMemberPosition->setMemberId($result['member_id']);
             $communityMemberPosition->setCommunityId($result['community_id']);
             $communityMemberPosition->setCommunityMemberId($result['id']);
             $communityMemberPosition->setName($result['position']);
             $communityMemberPosition->save();
         }
     }
 }