define_method_attribute=

# File activerecord/lib/active_record/attribute_methods/write.rb, line 15
          def define_method_attribute=(canonical_name, owner,, as: canonical_name)
            ActiveModel::AttributeMethods::AttrNames.define_attribute_accessor_method(
              owner, canonical_name, writer: true,
            ) do |temp_method_name, attr_name_expr|
              owner.define_cached_method(temp_method_name, as: "#{as}=", namespace: :active_record) do |batch|
                batch <<
                  "def #{temp_method_name}(value)" <<
                  "  _write_attribute(#{attr_name_expr}, value)" <<
                  "end"
              end
            end
          end