• UPGRADING FROM RT 5.0.0 and greater
• DEPRECATED CODE

UPGRADING FROM RT 5.0.0 and greater

This documentation notes internals changes between the 5.0 and 6.0 series that are primarily of interest to developers writing extensions or local customizations. It is not an exhaustive list.

• In RT 6, RT's sessions have been refactored to be non-blocking. To do this, we needed to change the way RT code interacts with sessions, mostly when setting values. If you have code that uses sessions, you will need to make changes.

  Previously, $session was a global hash you could access directly to get or set values for the current logged in user. For example, RT would set the current user directly in the session hash with code like:

      $HTML::Mason::Commands::session{'CurrentUser'} = RT::CurrentUser->new();

  Starting in RT 6, you also need to explicitly call a Set method to store those updates with code like this:

      # Write changes back to persistent session
      RT::Interface::Web::Session::Set(
          Key   => 'CurrentUser',
          Value => $HTML::Mason::Commands::session{'CurrentUser'},
      );

  In addition to Set for setting values, there is a new Load method to load values and a Delete to clear values out. You an find examples of all of these in the RT 6 code to see how they are used.

  The $session hash is still available globally as previously and can be accessed directly to get values, so that code does not need to change. This is likely the most common interaction with the session in extensions and custom code.

  These session updates were needed to work with the new htmx architecture (see below).

• RT now uses a library called htmx, which makes AJAX much easier and allows us to completely change the way pages, components, and widgets load and update in RT. You'll see the difference on just about every page in RT starting immediately with the home page. This update gives RT a much more interactive feel and speeds up nearly every interaction.

  Much existing code in callbacks should continue to work, but it will require testing because not all callbacks are called with the same context they had previously. Many components are now called individually and not in the context of a full RT page load and this may change the way code runs and html is rendered in responses.

  For new development, we think you'll find htmx to be an exciting and fun new way to create interactive components in RT. It allows RT to gain all of the benefits of a single-page javascript application with easy access to AJAX calls and dynamic page content, while still using the server-side Perl tools we already know.

• The Quick Create portlet has been updated to use htmx. This means index.html and Render.html will no longer be reloaded when the create form is submitted. If you previously used the Initial callback in either of these files, you can move your logic to the Initial callback in the new /Helpers/QuickCreate file where ProcessQuickCreate is now called.

  The quick create form also had a callback InFormElement inside the opening form tag. This has been removed because any form-specific attributes added are unlikely to work with htmx as-is. If you need to modify the form tag, you can create an overlay and customize there.

• Now you can customize ticket/asset create/update/display pages via "%PageLayoutMapping" in RT_Config and some callbacks have been removed because of the change. If you use these callbacks, you can update your code to use other existing callbacks or some new callbacks that have been added. For example, there are now callbacks at the start and end of every widget.

  The new design also means you can migrate your code into your own custom widget and add anywhere using the "%PageLayoutMapping" in RT_Config.

  To make upgrading RT easier, we have ported some of them so they can still work in RT 6.0, but they may not look like they did in earlier versions. We strongly recommend that you plan to migrate to the new layout.

  Affected callbacks include:

  /Ticket/Display.html BeforeShowSummary

  You can switch to BeforeWidget in /Elements/ShowWidgetSection.

  /Ticket/Display.html BeforeShowHistory

  It's been ported to /Ticket/Widgets/Display/History, but Transactions and Attachments arguments are absent. You can switch to BeforeWidget.

  /Ticket/Create.html AfterOwner

  You can switch to BeforeCustomFields in /Elements/EditCustomFields.

  /Ticket/Create.html AfterBasics

  You can switch to AfterWidget in /Ticket/Widgets/Create/Basics.

  /Ticket/Create.html BeforeRequestors, AfterRequestors, ModifyCustomRoles, AfterSubject, BeforeMessageBox, and AfterMessageBox

  They have been ported to /Ticket/Widgets/Create/Message accordingly.

  /Ticket/Update.html AfterTableOpens, BeforeUpdateType, AfterUpdateType, and AfterWorked

  They have been ported to /Ticket/Widgets/Update/Basics accordingly.

  BeforeUpdateType was incorrectly positioned before Queue item in RT 5, now it's right above the "Update Type" input. Previously it could be used to not render the hidden "id" input, now "id" is a mandatory input so you can't skip it any more.

  /Ticket/Update.html RightColumnBottom

  You can switch to AfterWidget in /Ticket/Widgets/Update/Basics.

  /Ticket/Update.html BeforeScrips and AfterScrips

  You can switch to BeforeWidget and AfterWidget in /Ticket/Widgets/Update/PreviewScrips, respectively.

  /Ticket/Update.html AfterGnuPG, AfterSubject, BeforeMessageBox, and AfterMessageBox

  They have been ported to /Ticket/Widgets/Update/Message accordingly.

  /Asset/Display.html AfterShowSummary

  You can switch to AfterWidget in /Elements/ShowWidgetSection.

  /Asset/Display.html AfterShowHistory

  It's been ported to /Asset/Widgets/Display/History, you can switch to AfterWidget.

  Also, /Ticket/Elements/ShowSummary and /Asset/Elements/ShowSummary are not called on display pages any more. If you have a customized version, you will need to customize corresponding widgets like "/Ticket/Widgets/Display/Basics", "/Asset/Widgets/Display/Basics", etc.

• In addition to the above, the following callbacks changed or moved in RT 6.

  /Elements/Tabs Privileged and and SelfService

  These callbacks are used to modify RT's top menu and page menu, usually to add new things to the menus. The previous callbacks are still available, but RT no longer rebuilds the top navigation menu on every request. If you previously used one of these callbacks to modify the top navigation menu via Menu(), that will no longer be defined or updated consistently in the existing callbacks.

  To add items to the main page menu, you can use two new callbacks added for this purpose:

      /Elements/Header PrivilegedMainNav
      /Elements/Header SelfServiceMainNav

  /Prefs/Other.html BeforeOption

  This callback is still in the same location on the rendered page, but it has been moved to /Prefs/Elements/EditUserPrefSections.

DEPRECATED CODE

Code that is no longer used after updates is marked as deprecated so it will log a warning for two versions before we remove it. This gives developers time to update their code. RT 6 does introduce some new deprecated code, so watch your logs for warnings after upgrading to find out if you need to make updates.