[Ruby on Rails]ActiveRecord::Base の getter/setter

app/models/application_record.rb

ApplicationRecord < ActiveRecord::Base

vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.1/lib/active_record.rb

35 module ActiveRecord
     ...
38   autoload :Base

vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.1/lib/active_record/base.rb

277   class Base
        ...
310     include AttributeMethods

vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.1/lib/active_record/attribute_methods.rb

395    def [](attr_name)
396      read_attribute(attr_name) { |n| missing_attribute(n, caller) }
397    end

       ...

409    def []=(attr_name, value)
410      write_attribute(attr_name, value)
411    end

vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.1/lib/active_record/attribute_methods/read.rb

54      def read_attribute(attr_name, &block)
          name = if self.class.attribute_alias?(attr_name)
            self.class.attribute_alias(attr_name).to_s
          else
            attr_name.to_s
          end

          primary_key = self.class.primary_key
          name = primary_key if name == "id".freeze && primary_key
          sync_with_transaction_state if name == primary_key
          _read_attribute(name, &block)
65      end

vendor/bundle/ruby/2.5.0/gems/activerecord-5.2.1/lib/active_record/attribute_methods/write.rb

35      def write_attribute(attr_name, value)
          name = if self.class.attribute_alias?(attr_name)
            self.class.attribute_alias(attr_name).to_s
          else
            attr_name.to_s
          end

          primary_key = self.class.primary_key
          name = primary_key if name == "id".freeze && primary_key
          sync_with_transaction_state if name == primary_key
          _write_attribute(name, value)
46      end