public override void Update(OGM item)
{
Transaction trans = Transaction.RunningTransaction;
Entity entity = item.GetEntity();
string match;
Dictionary <string, object?> parameters = new Dictionary <string, object?>();
parameters.Add("key", item.GetKey());
if (entity.RowVersion == null)
{
match = string.Format("MATCH (node:{0}) WHERE node.{1} = {{key}} SET node = {{newValues}}", entity.Label.Name, entity.Key.Name);
}
else
{
parameters.Add("lockId", Conversion <DateTime, long> .Convert(item.GetRowVersion()));
match = string.Format("MATCH (node:{0}) WHERE node.{1} = {{key}} AND node.{2} = {{lockId}} SET node = {{newValues}}", entity.Label.Name, entity.Key.Name, entity.RowVersion.Name);
item.SetRowVersion(trans.TransactionDate);
}
IDictionary <string, object?> node = item.GetData();
parameters.Add("newValues", node);
Dictionary <string, object?>?customState = null;
var args = entity.RaiseOnNodeUpdate(trans, item, match, parameters, ref customState);
RawResult result = trans.Run(args.Cypher, args.Parameters);
if (!result.Statistics().ContainsUpdates)
{
throw new DBConcurrencyException($"The {entity.Name} with {entity.Key.Name} '{item.GetKey()?.ToString() ?? "<NULL>"}' was changed or deleted by another process or thread.");
}
entity.RaiseOnNodeUpdated(trans, args);
item.PersistenceState = PersistenceState.Persisted;
}
public override void Insert(OGM item)
{
Transaction trans = Transaction.RunningTransaction;
Entity entity = item.GetEntity();
string labels = string.Join(":", entity.GetBaseTypesAndSelf().Where(x => x.IsVirtual == false).Select(x => x.Label.Name));
if (entity.RowVersion != null)
{
item.SetRowVersion(trans.TransactionDate);
}
IDictionary <string, object?> node = item.GetData();
string create = string.Format("CREATE (inserted:{0} {{node}}) Return inserted", labels);
if (entity.FunctionalId != null)
{
object?key = item.GetKey();
if (key is null)
{
string nextKey = string.Format("CALL blueprint41.functionalid.next('{0}') YIELD value as key", entity.FunctionalId.Label);
if (entity.FunctionalId.Format == IdFormat.Numeric)
{
nextKey = string.Format("CALL blueprint41.functionalid.nextNumeric('{0}') YIELD value as key", entity.FunctionalId.Label);
}
create = nextKey + "\r\n" + string.Format("CREATE (inserted:{0} {{node}}) SET inserted.{1} = key Return inserted", labels, entity.Key.Name);
node.Remove(entity.Key.Name);
}
else
{
entity.FunctionalId.SeenUid(key.ToString() !);
}
}
Dictionary <string, object?> parameters = new Dictionary <string, object?>();
parameters.Add("node", node);
Dictionary <string, object?>?customState = null;
var args = entity.RaiseOnNodeCreate(trans, item, create, parameters, ref customState);
var result = trans.Run(args.Cypher, args.Parameters);
RawRecord record = result.FirstOrDefault();
if (record == null)
{
throw new InvalidOperationException($"Due to an unexpected state of the neo4j transaction, it seems impossible to insert the {entity.Name} at this time.");
}
RawNode inserted = record["inserted"].As <RawNode>();
args.Id = inserted.Id;
args.Labels = inserted.Labels;
// HACK: To make it faster we do not copy/replicate the Dictionary here, but it means someone
// could be changing the INode content from within an event. Possibly dangerous, but
// turns out the Neo4j driver can deal with it ... for now ...
args.Properties = (Dictionary <string, object?>)inserted.Properties;
args = entity.RaiseOnNodeCreated(trans, args, inserted.Id, inserted.Labels, (Dictionary <string, object?>)inserted.Properties);
item.SetData(args.Properties !);
item.PersistenceState = PersistenceState.Persisted;
Transaction.RunningTransaction.Register(entity.Name, item, true);
}