store_accessor

# File activerecord/lib/active_record/store.rb, line 109
      def store_accessor(store_attribute, *keys, prefix: nil, suffix: nil)
        keys = keys.flatten

        accessor_prefix =
          case prefix
          when String, Symbol
            "#{prefix}_"
          when TrueClass
            "#{store_attribute}_"
          else
            ""
          end
        accessor_suffix =
          case suffix
          when String, Symbol
            "_#{suffix}"
          when TrueClass
            "_#{store_attribute}"
          else
            ""
          end

        _store_accessors_module.module_eval do
          keys.each do |key|
            accessor_key = "#{accessor_prefix}#{key}#{accessor_suffix}"

            define_method("#{accessor_key}=") do |value|
              write_store_attribute(store_attribute, key, value)
            end

            define_method(accessor_key) do
              read_store_attribute(store_attribute, key)
            end

            define_method("#{accessor_key}_changed?") do
              return false unless attribute_changed?(store_attribute)
              prev_store, new_store = changes[store_attribute]
              prev_store&.dig(key) != new_store&.dig(key)
            end

            define_method("#{accessor_key}_change") do
              return unless attribute_changed?(store_attribute)
              prev_store, new_store = changes[store_attribute]
              [prev_store&.dig(key), new_store&.dig(key)]
            end

            define_method("#{accessor_key}_was") do
              return unless attribute_changed?(store_attribute)
              prev_store, _new_store = changes[store_attribute]
              prev_store&.dig(key)
            end

            define_method("saved_change_to_#{accessor_key}?") do
              return false unless saved_change_to_attribute?(store_attribute)
              prev_store, new_store = saved_change_to_attribute(store_attribute)
              prev_store&.dig(key) != new_store&.dig(key)
            end

            define_method("saved_change_to_#{accessor_key}") do
              return unless saved_change_to_attribute?(store_attribute)
              prev_store, new_store = saved_change_to_attribute(store_attribute)
              [prev_store&.dig(key), new_store&.dig(key)]
            end

            define_method("#{accessor_key}_before_last_save") do
              return unless saved_change_to_attribute?(store_attribute)
              prev_store, _new_store = saved_change_to_attribute(store_attribute)
              prev_store&.dig(key)
            end
          end
        end

        # assign new store attribute and create new hash to ensure that each class in the hierarchy
        # has its own hash of stored attributes.
        self.local_stored_attributes ||= {}
        self.local_stored_attributes[store_attribute] ||= []
        self.local_stored_attributes[store_attribute] |= keys
      end