Mongoid 9.0.6, 8.1.10, and 8.0.10 are the latest patch releases in the 9.0, 8.1, and 8.0 series of the Mongoid ODM for MongoDB. They all include the following bug fix:

  • MONGOID-5844: querying the number of elements in a has_and_belongs_to_many association could return the wrong count in specific situations.

You may install these via Rubygems:

gem install --version 9.0.6 mongoid # for 9.0.6 gem install --version 8.1.10 mongoid # for 8.1.10 gem install --version 8.0.10 mongoid # for 8.0.10

Or via a Gemfile:

gem 'mongoid', '9.0.6' # for 9.0.6 gem 'mongoid', '8.1.10' # for 8.1.10 gem 'mongoid', '8.0.10' # for 8.0.10

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