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Release Notes

Learn what's new in:

Version 5.1.3
Version 5.1.2
Version 5.1.1
Version 5.1
Version 5.0

What's New in 5.1.3

The 5.1.3 driver patch release includes the following changes:

Fixes an issue that could cause assertion errors when using Cursor types.

What's New in 5.1.2

The 5.1.2 driver patch release includes the following changes:

Support for encoding Kotlin data classes with nullable generic parameter types. For example, you can encode the Container class in the following code:

@Serializable
data class Box<T>(
    val boxed: T
)
@Serializable
data class Container(
    val box: Box<String?>
)

What's New in 5.1.1

The 5.1.1 driver patch release includes the following changes:

When using the MONGODB-OIDC authentication mechanism, you must not include comma characters in the authMechanismProperties connection string value. To learn more about this behavior, see the MONGODB-OIDC guide.

What's New in 5.1

Warning

Deprecations in this release

To avoid breaking changes in future major releases of the driver, replace any application code that depends on deprecated program elements.

This section includes the following information:

Deprecations in 5.1
Improvements in 5.1
New Features in 5.1

Deprecations in 5.1

Support for MongoDB Server v3.6 is deprecated and will be removed in the next driver version release. To learn how to upgrade your MongoDB Server deployment, see Release Notes in the MongoDB Server manual.

Improvements in 5.1

Internal testing of GraalVM native image technology. These tests involve building native applications by using the GraalVM native-image tool.
Enhanced support for the MONGODB-OIDC authentication mechanism. To learn more about OIDC, see the MONGODB-OIDC guide.
Fixes an issue in which operations used the incorrect codec when using a polymorphic MongoCollection instance. This ensures that discriminator information is not lost when using bson-kotlinx.
Fixes an issue in which the class discriminator was the first field when decoding, resulting in field type errors when using a polymorphic MongoCollection instance.

New Features in 5.1

Support for polymorphic serialization. To learn more, see the Polymorphic Serialization section of the Kotlin Serialization guide.
Introduces the serverMonitoringMode connection URI option. To learn more, see the Specify Connection Options guide.

What's New in 5.0

New features of the 5.0 driver release include:

The KotlinSerializerCodecProvider constructor now accepts serializersModule and bsonConfiguration objects:
```
KotlinSerializerCodec.create(clazz.kotlin, serializersModule=serializersModule, bsonConfiguration=bsonConfiguration)
```
This makes it easier to customize your configuration.
Fixes a Kotlin reflection bug that resulted in container type erasure.

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