public void IgnoreEntityDeletedAndIgnoreEntityDublicateKeyError()
{
var id = Guid.NewGuid();
var id2 = Guid.NewGuid();
using (var cx = new OracleDbContext())
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v1";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
var lw2 = new LastWinsEntity();
lw2.Id = id2;
lw2.Name = "v1";
lw2.Created = lw2.Updated = DateTime.Now;
cx.LastWins.Add(lw2);
cx.SaveChanges(); // add lw1 and lw2
Delete(id); // meantime delete lw1
lw.Name = "v2"; // modify lw1
lw.Updated = DateTime.Now;
var lw3 = new LastWinsEntity(); // lw3 dublicate of lw2
lw3.Id = id2;
lw2.Name = "v1";
lw2.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw3);
cx.SaveChanges(SaveChangesMode.All);
}
}
public void DublicateKeyHandling_AddUpdate()
{
var id = Guid.NewGuid();
var lwc = CreateOptiContext();
lwc.SelectFunc = (cx) =>
{
return(cx.LastWins.FirstOrDefault(e => e.Id == id));
};
lwc.AddAction = (cx) =>
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v2";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
cx.SaveChanges();
};
lwc.UpdateAction = (cx, lw) =>
{
lw.Name = "v2";
lw.Updated = DateTime.Now;
cx.SaveChanges();
};
lwc.Execute(); // add
lwc.Execute(); // update
}
public void DublicateKeyHandling_AddDeleteAdd()
{
var id = Guid.NewGuid();
var lwc = CreateOptiContext();
lwc.SelectFunc = (cx) =>
{
var i = cx.LastWins.Find(id);
return(i);
};
lwc.AddAction = (cx) =>
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v1";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
cx.SaveChanges();
};
lwc.UpdateAction = (cx, lw) =>
{
lw.Name = "v2";
lw.Created = lw.Updated = DateTime.Now;
cx.SaveChanges();
};
lwc.Execute(); // add
Delete(id); // delete in the meantime
lwc.Execute(); // add 2
}
public void IgnoreEntityDeleted2()
{
var id = Guid.NewGuid();
using (var cx = new OracleDbContext())
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v1";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
cx.SaveChanges(); // save first one
Delete(id);
cx.LastWins.Remove(lw); // already deleted
cx.SaveChanges(SaveChangesMode.IgnoreEntityDeleted);
}
}
public void IgnoreEntityDublicateKeyError()
{
var id = Guid.NewGuid();
using (var cx = new OracleDbContext())
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v1";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
cx.SaveChanges(); // save first one
var lw2 = new LastWinsEntity();
lw2.Id = id;
lw2.Name = "v1";
lw2.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw2);
cx.SaveChanges(SaveChangesMode.IgnoreEntityDublicateKey);
}
}
public void DublicateKey_Context()
{
var id = Guid.NewGuid();
var lwc = CreateOptiContext();
lwc.SelectFunc = (cx) =>
{
var i = cx.LastWins.Find(id);
return(i);
};
lwc.AddAction = (cx) =>
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v1";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
cx.SaveChanges();
};
lwc.UpdateAction = (cx, lw) =>
{
lw.Name = "v2";
lw.Created = lw.Updated = DateTime.Now;
cx.SaveChanges();
};
// begin select
var cx2 = lwc.ContextFactory();
var entity = lwc.SelectFunc(cx2);
// add in the meantime
lwc.Execute(); // first add
if (entity == null) // entity is always null
{
lwc.TryAdd(cx2); // simulate add with dublicate key
}
}
public void DublicateKeyHandling_AddSelectDeleteUpdate()
{
var id = Guid.NewGuid();
var lwc = CreateOptiContext();
lwc.SelectFunc = (cx) =>
{
var i = cx.LastWins.Find(id);
return(i);
};
lwc.AddAction = (cx) =>
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v1";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
cx.SaveChanges();
};
lwc.UpdateAction = (cx, lw) =>
{
lw.Name = "v2";
lw.Created = lw.Updated = DateTime.Now;
cx.SaveChanges();
};
lwc.Execute();
// simulate Execute part 1 -> create context and select entity
var cx2 = lwc.ContextFactory();
var entity = lwc.SelectFunc(cx2);
// delete in the meantime
Delete(id);
// simulate Execute part 2 -> TryUpdate the existing entity. Its not here, so AddAction is called
lwc.TryUpdate(cx2, entity);
}
public void DublicateKey()
{
var id = Guid.NewGuid();
using (var cx = new OracleDbContext())
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v1";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
cx.SaveChanges();
}
using (var cx = new OracleDbContext())
{
try
{
var lw = new LastWinsEntity();
lw.Id = id;
lw.Name = "v2";
lw.Created = lw.Updated = DateTime.Now;
cx.LastWins.Add(lw);
cx.SaveChanges();
}
catch (DbUpdateException dex)
{
var oex = dex.InnerException?.InnerException as OracleException;
if (oex != null)
{
if (oex.Number == 1) // 1 = dublicate key error number
{
throw new Exception("dublicate key", dex);
}
}
}
}
}