What's New

Adds the human_readable_serialization option to the CollectionOptions struct. This option instructs the driver to serialize values passed to CRUD methods as a human-readable format. The default value of this option is false.

Adds the run_cursor_command() method to run a database command and retrieve the response as a Cursor type. To learn more, see the Run a Command guide.

Adds SDAM event logging when you use the tracing-unstable feature flag.

Adds the following configurations for Client and connection management:

• max_connecting: an option that you can set in a ClientOptions struct to specify how many connections you can establish in parallel. To learn more about this option, see Connection Pool in the Performance Considerations guide.

• Client::warm_connection_pool(): a method that you can use to create new connections in the connection pool to provide more predictable performance. When you use this method, the driver attempts to create connections up to the number specified in the min_pool_size setting.

• Client::shutdown(): a method that you can use to stop background tasks and wait for handlers to drop. This method can be helpful if you use event handlers to reference external resources, as these handlers might be used in tasks even after the Client is closed.

Supports AWS Identity and Access Management (IAM) roles for service accounts, such as Elastic Kubernetes Service (EKS) accounts.

Supports GCP-attached service accounts when using the Cloud Key Management System (KMS).

Supports fetching on-demand CSFLE credentials from the Azure KMS.

Implements the FromStr trait for the Namespace struct. This change allows you to parse a string that includes a database and collection name, such as "testdb.testcollection" into a Namespace instance.

Includes the server_id in a ConnectionInfo struct as an i64 type.

Removes most type constraints on values referenced by a Cursor.

Updates the libmongocrypt version in the driver dependencies in order to use the Queryable Encryption feature with equality queries.