RIA Services Repository Save does not work!?
- by Savvas Sopiadis
Hello everybody!
Doing my first SL4 MVVM RIA based application and i ran into the following situation:
updating a record (EF4,NO-POCOS!!) in the SL-client seems to take place, but values in the dbms are unchanged. Debugging with Fiddler the message on save is (amongst others):
EntityActions.nil? b9http://schemas.microsoft.com/2003/10/Serialization/Arrays^HasMemberChanges?^Id?^ Operation?Update
I assume that this says only: hey! the dbms should do an update on this record, AND nothing more! Is that right?!
I 'm using a generic repository like this:
public class Repository<T> : IRepository<T> where T : class
{
IObjectSet<T> _objectSet;
IObjectContext _objectContext;
public Repository(IObjectContext objectContext)
{
this._objectContext = objectContext;
_objectSet = objectContext.CreateObjectSet<T>();
}
public IQueryable<T> AsQueryable()
{
return _objectSet;
}
public IEnumerable<T> GetAll()
{
return _objectSet.ToList();
}
public IEnumerable<T> Find(Expression<Func<T, bool>> where)
{
return _objectSet.Where(where);
}
public T Single(Expression<Func<T, bool>> where)
{
return _objectSet.Single(where);
}
public T First(Expression<Func<T, bool>> where)
{
return _objectSet.First(where);
}
public void Delete(T entity)
{
_objectSet.DeleteObject(entity);
}
public void Add(T entity)
{
_objectSet.AddObject(entity);
}
public void Attach(T entity)
{
_objectSet.Attach(entity);
}
public void Save()
{
_objectContext.SaveChanges();
}
}
The DomainService Update Method is the following:
[Update]
public void UpdateCulture(Culture currentCulture)
{
if (currentCulture.EntityState == System.Data.EntityState.Detached)
{
this.cultureRepository.Attach(currentCulture);
}
this.cultureRepository.Save();
}
I know that the currentCulture-Entity is detached. What confuses me (amongst other things) is this: is the _objectContext still alive? (which means it "will be"??? aware of the changes made to record, so simply calling Attach() and then Save() should be enough!?!?)
What am i missing?
Development Environment: VS2010RC - Entity Framework 4 (no POCOs)
Thanks in advance
