Entity Framework and MySql updating entity

Question

I'm having problems updating entities with EF6 and MySql.

This is part of the code:

public partial class Repositorio<T> : IRepositorio<T> where T : EntidadBase
{
    private readonly IDbContext _contexto;
    private IDbSet<T> _entidades;

    public Repositorio(IDbContext contexto)
    {
        this._contexto = contexto;
    }

    private IDbSet<T> Entidades
    {
        get
        {
            if (_entidades == null)
                _entidades = _contexto.Set<T>();
            return _entidades;
        }
    }

    public void Insert(T entity)
    {
        try
        {
            if (entity == null)
                throw new ArgumentNullException("entity");

            this.Entidades.Add(entity);

            this._contexto.SaveChanges();
        }
        catch (Exception dbEx)
        {
            throw dbEx
        }
    }


    public void Update(T entidad)
    {
        try
        {
            if (entidad == null)
                throw new ArgumentNullException("entidad");

            this._contexto.SaveChanges();
        }
        catch (Exception dbEx)
        {
            throw dbEx;
        }
    }
}

And I used it with something like that:

var _repositorio = new Repositorio<MyEntity>(myContext);
var myEntity = _repositorio.GetById(13);

myEntity.Name = "Mooo";

_repositorio.Update(myEntity);

It doesn't throw any exception, but the data has no changes.

The Insert() method works perfect.

Any idea about this?

PS: I'm using MySql.Data.Entities from NuGet Package Installer, and it includes EF 6.0.0, MySql.Data 6.8.3.0 and MySql.Data.Entity.EF6 6.8.3.0.

Answer 1

haha, ah ok I see your problem.. change your update method to this:

 public void Update(T entidad)
    {
        try
        {
            if (entidad == null)
                throw new ArgumentNullException("entidad");

            _contexto.Entry(entidad).State = System.Data.EntityState.Modified;
            this._contexto.SaveChanges();
        }
        catch (Exception dbEx)
        {
            throw dbEx;
        }
    }

Also, have a look at using the UnitOfWork pattern along with the repository pattern, you will need it.