instance method load_defaults

# File railties/lib/rails/application/configuration.rb, line 91
      def load_defaults(target_version)
        # To introduce a change in behavior, follow these steps:
        # 1. Add an accessor on the target object (e.g. the ActiveJob class for
        #    global Active Job config).
        # 2. Set a default value there preserving existing behavior for existing
        #    applications.
        # 3. Implement the behavior change based on the config value.
        # 4. In the section below corresponding to the next release of Rails,
        #    configure the default value.
        # 5. Add a commented out section in the `new_framework_defaults` to
        #    configure the default value again.
        # 6. Update the guide in `configuring.md`.

        # To remove configurable deprecated behavior, follow these steps:
        # 1. Update or remove the entry in the guides.
        # 2. Remove the references below.
        # 3. Remove the legacy code paths and config check.
        # 4. Remove the config accessor.

        case target_version.to_s
        when "5.0"
          if respond_to?(:action_controller)
            action_controller.per_form_csrf_tokens = true
            action_controller.forgery_protection_origin_check = true
          end

          ActiveSupport.to_time_preserves_timezone = true

          if respond_to?(:active_record)
            active_record.belongs_to_required_by_default = true
          end

          self.ssl_options = { hsts: { subdomains: true } }
        when "5.1"
          load_defaults "5.0"

          if respond_to?(:assets)
            assets.unknown_asset_fallback = false
          end

          if respond_to?(:action_view)
            action_view.form_with_generates_remote_forms = true
          end
        when "5.2"
          load_defaults "5.1"

          if respond_to?(:active_record)
            active_record.cache_versioning = true
          end

          if respond_to?(:action_dispatch)
            action_dispatch.use_authenticated_cookie_encryption = true
          end

          if respond_to?(:active_support)
            active_support.use_authenticated_message_encryption = true
            active_support.hash_digest_class = OpenSSL::Digest::SHA1
          end

          if respond_to?(:action_controller)
            action_controller.default_protect_from_forgery = true
          end

          if respond_to?(:action_view)
            action_view.form_with_generates_ids = true
          end
        when "6.0"
          load_defaults "5.2"

          if respond_to?(:action_view)
            action_view.default_enforce_utf8 = false
          end

          if respond_to?(:action_dispatch)
            action_dispatch.use_cookies_with_metadata = true
          end

          if respond_to?(:action_mailer)
            action_mailer.delivery_job = "ActionMailer::MailDeliveryJob"
          end

          if respond_to?(:active_storage)
            active_storage.queues.analysis = :active_storage_analysis
            active_storage.queues.purge    = :active_storage_purge
          end

          if respond_to?(:active_record)
            active_record.collection_cache_versioning = true
          end
        when "6.1"
          load_defaults "6.0"

          if respond_to?(:active_record)
            active_record.has_many_inversing = true
          end

          if respond_to?(:active_job)
            active_job.retry_jitter = 0.15
          end

          if respond_to?(:action_dispatch)
            action_dispatch.cookies_same_site_protection = :lax
            action_dispatch.ssl_default_redirect_status = 308
          end

          if respond_to?(:action_view)
            action_view.form_with_generates_remote_forms = false
            action_view.preload_links_header = true
          end

          if respond_to?(:active_storage)
            active_storage.track_variants = true

            active_storage.queues.analysis = nil
            active_storage.queues.purge = nil
          end

          if respond_to?(:action_mailbox)
            action_mailbox.queues.incineration = nil
            action_mailbox.queues.routing = nil
          end

          if respond_to?(:action_mailer)
            action_mailer.deliver_later_queue_name = nil
          end

          ActiveSupport.utc_to_local_returns_utc_offset_times = true
        when "7.0"
          load_defaults "6.1"

          if respond_to?(:action_dispatch)
            action_dispatch.default_headers = {
              "X-Frame-Options" => "SAMEORIGIN",
              "X-XSS-Protection" => "0",
              "X-Content-Type-Options" => "nosniff",
              "X-Download-Options" => "noopen",
              "X-Permitted-Cross-Domain-Policies" => "none",
              "Referrer-Policy" => "strict-origin-when-cross-origin"
            }
            action_dispatch.cookies_serializer = :json
          end

          if respond_to?(:action_view)
            action_view.button_to_generates_button_tag = true
            action_view.apply_stylesheet_media_default = false
          end

          if respond_to?(:active_support)
            active_support.hash_digest_class = OpenSSL::Digest::SHA256
            active_support.key_generator_hash_digest_class = OpenSSL::Digest::SHA256
            active_support.cache_format_version = 7.0
            active_support.executor_around_test_case = true
          end

          if respond_to?(:action_mailer)
            action_mailer.smtp_timeout = 5
          end

          if respond_to?(:active_storage)
            active_storage.video_preview_arguments =
              "-vf 'select=eq(n\\,0)+eq(key\\,1)+gt(scene\\,0.015),loop=loop=-1:size=2,trim=start_frame=1'" \
              " -frames:v 1 -f image2"

            active_storage.variant_processor = :vips
            active_storage.multiple_file_field_include_hidden = true
          end

          if respond_to?(:active_record)
            active_record.verify_foreign_keys_for_fixtures = true
            active_record.partial_inserts = false
            active_record.automatic_scope_inversing = true
          end

          if respond_to?(:action_controller)
            action_controller.raise_on_open_redirects = true
            action_controller.wrap_parameters_by_default = true
          end
        when "7.1"
          load_defaults "7.0"

          self.add_autoload_paths_to_load_path = false
          self.precompile_filter_parameters = true
          self.dom_testing_default_html_version = defined?(Nokogiri::HTML5) ? :html5 : :html4

          if Rails.env.local?
            self.log_file_size = 100 * 1024 * 1024
          end

          if respond_to?(:active_record)
            active_record.run_commit_callbacks_on_first_saved_instances_in_transaction = false
            active_record.sqlite3_adapter_strict_strings_by_default = true
            active_record.query_log_tags_format = :sqlcommenter
            active_record.raise_on_assign_to_attr_readonly = true
            active_record.belongs_to_required_validates_foreign_key = false
            active_record.before_committed_on_all_records = true
            active_record.default_column_serializer = nil
            active_record.encryption.hash_digest_class = OpenSSL::Digest::SHA256
            active_record.encryption.support_sha1_for_non_deterministic_encryption = false
            active_record.marshalling_format_version = 7.1
            active_record.run_after_transaction_callbacks_in_order_defined = true
            active_record.generate_secure_token_on = :initialize
          end

          if respond_to?(:action_dispatch)
            action_dispatch.default_headers = {
              "X-Frame-Options" => "SAMEORIGIN",
              "X-XSS-Protection" => "0",
              "X-Content-Type-Options" => "nosniff",
              "X-Permitted-Cross-Domain-Policies" => "none",
              "Referrer-Policy" => "strict-origin-when-cross-origin"
            }
            action_dispatch.debug_exception_log_level = :error
          end

          if respond_to?(:active_support)
            active_support.cache_format_version = 7.1
            active_support.message_serializer = :json_allow_marshal
            active_support.use_message_serializer_for_metadata = true
            active_support.raise_on_invalid_cache_expiration_time = true
          end

          if respond_to?(:action_view)
            require "action_view/helpers"
            action_view.sanitizer_vendor = Rails::HTML::Sanitizer.best_supported_vendor
          end

          if respond_to?(:action_text)
            require "action_view/helpers"
            action_text.sanitizer_vendor = Rails::HTML::Sanitizer.best_supported_vendor
          end
        when "7.2"
          load_defaults "7.1"

          self.yjit = true

          if respond_to?(:active_job)
            active_job.enqueue_after_transaction_commit = :default
          end

          if respond_to?(:active_storage)
            active_storage.web_image_content_types = %w( image/png image/jpeg image/gif image/webp )
          end

          if respond_to?(:active_record)
            active_record.postgresql_adapter_decode_dates = true
            active_record.validate_migration_timestamps = true
          end
        else
          raise "Unknown version #{target_version.to_s.inspect}"
        end

        @loaded_config_version = target_version
      end