function onPreSave(request, response, modules) {
    if (request.method === 'POST') {
        if (!request.body.hasOwnProperty('username')) {
            request.body.views = 0;
        }
    } else if (request.method === 'PUT') {
        var collectionAccess = modules.collectionAccess;
        var myID = collectionAccess.objectID(request.entityId);
        var ads = collectionAccess.collection("ads");
        var logger = modules.logger;
        logger.info(request);

        ads.findOne({"_id": myID}, [], function (err, result) {
            if (err) {
                response.error(err);
            }
          request.body.views = result.views;
          response.continue();
        });
    }

    response.continue();
}