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Type:
Bug
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Resolution: Works as Designed
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Priority:
Unknown
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None
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Affects Version/s: 2.14.1
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Component/s: Serialization
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None
If you register a GuidSerializer, this serializer is respected for POCOs, but ignored for BsonDocuments.
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using System; using MongoDB.Bson; using MongoDB.Bson.Serialization; using MongoDB.Bson.Serialization.Serializers; using MongoDB.Driver; BsonSerializer.RegisterSerializer(new GuidSerializer(GuidRepresentation.Standard)); var client = new MongoClient(); var db = client.GetDatabase("test"); var collAsItem = db.GetCollection<Item>("guids"); var collAsBson = db.GetCollection<BsonDocument>("guids"); collAsBson.DeleteMany("{}"); collAsItem.InsertOne(new Item { Id = Guid.NewGuid(), Name = "AsOrder" }); collAsBson.InsertOne(new BsonDocument {{ "_id", Guid.NewGuid() }, { "Name", "AsBson"}}); var docs = collAsBson.AsQueryable().ToList(); foreach (var doc in docs) { Console.WriteLine($"{doc["_id"]} ({doc["Name"]})"); } class Item { public Guid Id { get; set; } public string Name { get; set; } }
The output is as follows:
UuidStandard:0xb9d8bcca00d04b33b2d8bde43b07818e (AsOrder) UuidLegacy:0x12000db290a3c242b855358edade519b (AsBson)
If we configure the default GUID representation (whether or not the GuidSerializer above is registered), we get the correct output:
BsonDefaults.GuidRepresentation = GuidRepresentation.Standard;
Output:
UuidStandard:0x1e343d0ea60f4e06b463ea0d6d24840f (AsOrder) UuidStandard:0x1b0ad1052a4947688e35d39ab2515b88 (AsBson)