How to use [BsonId] in combination with DiscriminatedInterface Serializer

Working with Data Drivers
1

Hello,

I have a setup which requires me to rely on an interface to create my IMongoCollection. Basically the objects I’m persisting are using generics so I cannot use a class in GetCollection<>.

I have a custom discriminator which i register with the interface and all possible generics like this:

BsonSerializer.RegisterDiscriminatorConvention(typeof(IMyClass),
    new MyClassConvention());
foreach (var type in genericOptions) {
  var genType = typeof(MyClass<>).MakeGenericType(type);
  BsonSerializer.RegisterDiscriminatorConvention(genType,
    new MyClassConvention());
}

The object has a string Id field which i expect to be auto filled by the mongo driver. However the serializer now becomes DiscriminatedInterfaceSerializer which does not implement the interface IBsonIdProvider.

Can someone tell me what the best approach is for my setup? I would like to rely on the default serialization as the rest of my object is serialized and deserialized properly, however its just persisting the _id field as null.

When I use [BsonIgnoreIfDefault] mongodb sets the id but it is not updated in the in memory object after the InsertOne call.

2

I would still like an answer, however for now I’ve solved it by changing the interface to be an abstract class.