private void UpdateInfo(Category cat, DalCategory dalCat)
{
if (cat == null || dalCat == null) throw new ArgumentNullException();
cat.Id = dalCat.Id;
cat.Name = dalCat.Name;
cat.Description = dalCat.Description;
cat.DateCreated = dalCat.DateCreated;
cat.Category_Id = dalCat.ParentCategoryId;
}
private Category ToOrmCategory(DalCategory cat)
{
if (cat == null) return null;
var topics = cat.Topics ?? new List<DalTopic>();
var dbSetTopics = _context.Set<Topic>();
var actualTopics = topics.Select(t => dbSetTopics.SingleOrDefault(tt => tt.Id == t.Id)).ToList();
var newCat = new Category {Topics = actualTopics};
UpdateInfo(newCat, cat);
return newCat;
}