2.17.1

This bug fix release in the 2.17 series repairs the following issues:

• RUBY-2869 Avoid using mutexes in code called from finalizers for Ruby 3.1 compatibility
• RUBY-2932 Repair read preference passing in Mongoid when using map_reduce

2.16.2

This bug fix release in the 2.16 series repairs a regression manifesting in Mongoid when using map_reduce and passing read preference:

• RUBY-2932 map_reduce changes broke read preference passing from Mongoid

2.17.0

This feature release of the Ruby Driver adds support for MongoDB server 5.1.

This release includes the following new features:

• RUBY-2524 Snapshot reads. Added new readConcern level "snapshot" (non-speculative) for read commands outside of transactions, including on secondaries.
• RUBY-2526 Support $merge and $out executing on secondaries
• RUBY-2659 Support 'let' option for aggregate command
• RUBY-2821 Support 'let' option for CRUD commands

This release removes support for Ruby versions 2.3 and 2.4. The minimal required Ruby version is now 2.5. Read more about this change here.

This release also removes support for MongoDB versions older than 3.6. Read more about this change here.

The following bugs were fixed:

• RUBY-2805 Push monitor thread can exit when address resolution fails

The following non-breaking changes were made:

• RUBY-2806 Avoid tight looping in push monitor
• RUBY-2733 mapReduce command is now deprecated

2.16.1

This is a patch release in the 2.16 series.

The following bugs were fixed:

• RUBY-2805 Push monitor thread can exit when address resolution fails

The following non-breaking changes were made:

• RUBY-2806 Avoid tight looping in push monitor

2.16.0

This release adds the following new feature:

• Load balancer support.

This release of the Ruby driver deprecates support for MongoDB server versions below 3.6.

2.16.0.alpha1

This release adds the following new feature:

• Experimental load balancer support.

The following minor improvement has been made:

• GridFS file retrieval no longer requires index creation privileges when the indexes already exist, and is thus usable with users that have only read permissions.

This release of the Ruby driver increases the minimum required Ruby versionto 2.4.

2.15.1

This patch release in the 2.15 series fixes the following issue:

• RUBY-2675 QueryCache returns wrong results after partial iteration of result set, e.g. after calling none?

2.14.1

This patch release in the 2.14 series fixes the following issues:

• RUBY-2453 Segfault at program exit due to SRV polling
• RUBY-2558 :secondary_preferred read preference in 3.6+ sharded clusters performs primary read
• RUBY-2675 QueryCache returns wrong results after partial iteration of result set, e.g. after calling none?

2.13.3

This patch release in the 2.15 series fixes the following issue:

• RUBY-2558 :secondary_preferred read preference in 3.6+ sharded clusters performs primary read

2.15.0

This release adds the following major new features:

• Ruby 3.0 support
• Ability to specify server API parameters
• Support for Zstandard and Snappy wire protocol compression
• Query cache middleware is now available in the driver
• Support for time series options when creating collections
• Experimental support for MongoDB Atlas Serverless when not using a load balancer

Please consult the release notes in the documentation for the complete list of changes.