public async Task <bool> SaveAsync(IDataTransaction transaction)
{
var columns = new List <PropertyInfo>();
while (Dirty.TryTake(out var e))
{
columns.Add(e);
}
IDataTransaction tr = null;
try
{
tr = transaction ?? _data.GetTransaction();
if (Target is IEntity <int> ei && ei.Id < 0)
{
var t = await tr.AddAsync <T>(e => Target.CopyPrimitivesTo(e));
if (transaction == null)
{
tr.Done();
}
ei.Id = (int)t.Id;
return(true);
}
if (await tr.UpdateAsync(Target, columns.Select(GetColumnName)))
{
if (transaction == null)
{
tr.Done();
}
IsDirty = false;
return(true);
}
return(false);
}
catch (Exception ex)
{
foreach (var p in columns)
{
Dirty.Add(p);
}
throw new DataException("Save failure", ex);
}
finally
{
if (transaction == null)
{
tr?.Dispose();
}
}
}
public IRestCollection GetRestCollection(Stem <TItem> stem)
{
IDataTransaction transaction = _dataSource.CreateTransaction();
stem.OnDispose += delegate { transaction.Dispose(); };
IEngineRepository <TItem> repository = _dataSource.GetRepository <TItem>(transaction);
var wrapper = new DataEventWrapper <TItem>(transaction, repository);
wrapper.TryWrapEvents(new StemDataChangeEvents <TItem>(stem));
var subContext = new StemsEngineSubContext <TItem>(stem);
var context = new FullEngineContext <TItem>(wrapper.Transaction, wrapper.Repository, subContext);
return(new EngineRestCollection <TItem>(context));
}
public void Dispose()
{
_transaction.Dispose();
}