ActiveRecord Aggregations module Aggregations Ruby on Rails 5.2.8.1 Since v2.2.3 Available in: v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2 Compare with: … v2.2.3 v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2 See ActiveRecord::Aggregations::ClassMethods for documentation Namespace Modules ActiveRecord::Aggregations::ClassMethods Extends ActiveSupport::Concern Private methods (2) Implementation detail — not part of the public API. # clear_aggregation_cache # init_internals Used by Included by (1) ActiveRecord::Base Methods (inherited) From ActiveSupport::Concern (3) # append_features # class_methods # included