c# – How to retrieve data that was saved in the bank during a creation process

Question:

In some ORMs NodeJs I have this feature. However, would you like to know how to rescue an entity that was persisted in the bank?

For example: User has an ID attribute. If I return the item, the persisted ID doesn't come inside item .

I would like to return something from the _context that was persisted, so that I can retrieve the Id.

Here's a generic template I'm using:

    public T Create(T item)
    {
        _dataset.Add(item);
        _context.SaveChanges();
        return item;   
    }

Here's a class with basic methods:

public class GenericRepository<T> : IRepository<T> where T : BaseEntity
    {
        protected readonly AimbraDocContext _context;
        private readonly DbSet<T> _dataset;

        public GenericRepository(AimbraDocContext context)
        {
            _context = context;
            _dataset = _context.Set<T>();
        }

        public T Create(T item)
        {
            _dataset.Add(item);
            _context.SaveChanges();
            return item;
        }

        public void Delete(long id)
        {
            var result = _dataset.SingleOrDefault(i => i.Id.Equals(id));
            if (result != null)
            {
                _dataset.Remove(result);
                _context.SaveChanges();
            }
        }

        public bool Exist(long? id)
        {
            return _dataset.Any(i => i.Id.Equals(id));
        }

        public List<T> FindAll()
        {
            return _dataset.ToList();
        }

        public T FindById(long id)
        {
            var result = _dataset.SingleOrDefault(i => i.Id.Equals(id));
            if (result == null) return null;
            return result;
        }

        public T Update(T t)
        {
            if (!Exist(t.Id)) return null;
            var result = _dataset.SingleOrDefault(i => i.Id.Equals(t.Id));
            _context.Entry(result).CurrentValues.SetValues(t);
            _context.SaveChanges();
            return t;

        }
    }

Answer:

What you can do is instead of using the Id as an int you can use the GUID which will always give you a string.

   Id = Guid.NewGuid();

That way you will always have a unique identifier and know what it is before registering with the bank.