public UpdateDefinition <BsonDocument> BuildUpdatesForSave(
UpdateDefinition <BsonDocument> update, TrackablePocoTracker <T> tracker, params object[] keyValues)
{
var keyNamespace = DocumentHelper.ToDotPathWithTrailer(keyValues);
// mimic BsonClassMapSerializer.Serialize to serialize changed value correctly.
// build bson elements containing set field values
var setDocument = new BsonDocument();
var setBsonWriter = new BsonDocumentWriter(setDocument);
var setContext = BsonSerializationContext.CreateRoot(setBsonWriter);
setBsonWriter.WriteStartDocument();
foreach (var change in tracker.ChangeMap)
{
if (change.Value.NewValue != null)
{
BsonMemberMap memberMap;
if (_propertyToMemberMap.TryGetValue(change.Key, out memberMap) == false)
{
continue;
}
setBsonWriter.WriteName(memberMap.ElementName);
memberMap.GetSerializer().Serialize(setContext, change.Value.NewValue);
}
else
{
update = (update == null)
? Builders <BsonDocument> .Update.Unset(keyNamespace + change.Key.Name)
: update.Unset(keyNamespace + change.Key.Name);
}
}
setBsonWriter.WriteEndDocument();
setBsonWriter.Dispose();
foreach (var element in setDocument.Elements)
{
update = (update == null)
? Builders <BsonDocument> .Update.Set(keyNamespace + element.Name, element.Value)
: update.Set(keyNamespace + element.Name, element.Value);
}
return(update);
}
