v5.2
v8.0 v7.2 v7.1 v7.0 v6.1 v6.0 v5.2
GitHub

Required Files
Namespace
- Module
- Class

Ruby on Rails 5.2.8

merger.rb

activerecord/lib/active_record/relation/merger.rb on GitHub

Required Files

active_support/core_ext/hash/keys

Namespace

Module

ActiveRecord
ActiveRecord::Associations

Class

ActiveRecord::Relation