public async Task<Tuple<long, bool>> Save(Feed feed)
{
var feedModel = feed.ToModel();
_unitOfWork.Repository<DAL.Models.Feed>().AddUpdate(feedModel);
await _unitOfWork.SaveChanges();
if (feedModel.Id == 0)
{
return new Tuple<long, bool>(0, true);
}
return new Tuple<long, bool>(feedModel.Id, true);
}