If you’re using Drupal 8, you may expect a similar experience when Drupal 9 comes out later this year in June. “The major deal with Drupal 9 is…that it shouldn’t be a huge issue,” Dries stated.
Drupal 9 will inherit all of the functionalities of Drupal 8 that have been updated and added by the Drupal community since 2015. For concrete confirming the platform security, a few modifications will be made, notably to system requirements and third-party dependencies that are as follows:
Your website is required to be updated with the newest minor version. Upgrades are only supported from the most recent planned minor release and one prior release (for example, Drupal 8.8 and 8.9), not from earlier versions like Drupal 8.3.
Check your site for deprecated code that will be removed in the next major release. If necessary, fix any deprecations. Several modules may need to be upgraded. This is where the Upgrade Status module may help.
Here’s your to-do list for Drupal 9, the majority of which you can do with Upgrade Status:
You now have a fully functional Drupal 8 site that has been thoroughly cleansed. When all of your custom code and contributed projects are complete, you’re ready to upgrade Drupal core to Drupal 9.
Specific hardware requirements must be met for the update to be successful. There are very likely needs for your system to function properly, which are as follows:
Because hosting requirements protect your online project, you must be certain of them, especially after a large upgrade. The four primary Drupal 9 hosts are given here and their prerequisites.
The Drupal 9 codebase is similar to Drupal 8.9, except it does not include the deprecated code. The impact of this deprecated code varies depending on what you’re using and which APIs you’ve used.
Custom modules, contrib modules, and themes are the three items to consider. Make a list in whatever format suits your group best.
Installing the Upgrade Status module is a good place to start. In a development environment, please enable it. This will offer you an excellent starting point for the data you wish to track. Install this patch for the module to obtain this data into a spreadsheet.
Because the Drupal development procedure for each category will change, organize the sheet so that you can filter your contrib and custom modules.
Install and execute drupal-check in your development environment or your continuous integration strategy. This will show you where you need to work to make your custom codebase Drupal 9 compliant.
The advantage of including it in your CI process is that it ensures that no new incompatibilities are introduced. There’s also a Visual Studio Code plugin.
Create a ticket in your ticketing system for each module with a Drupal 9 compatibility problem. Fill in the blanks. Minor adjustments, such as a different function call, will be required. Others may require more extensive reworking. Determine who they are as soon as feasible. Now is also a good time to look over the contrib area and determine whether you still require these custom modules.
Keep note of any contrib base or sub-themes you use and treat them as modules by adding them to your list.
Moving from Twig 1 to Twig 2 has its own set of deprecations. Make sure your templates aren’t employing Twig methods that aren’t compatible with version 2. The Upgrade Status module should flag these. Many projects may not require any revisions, but it is essential to double-check early to avoid being caught off guard. Add any flags to your ticketing system as tickets.
Drupal being the open-source platform, is freely available to create your website. It comes under the most famous CMS, which are built-in PHP languages. Professional web developers always recommend keeping the website updated with the latest Drupal versions to ensure data integrity and website operability. We have curated the following 13 steps, which you can follow for upgrading or migrating to Drupal version 9:
It is crucial to figure out the website scope, comprising the need for up-gradation for modules and themes. With “Upgrade Status,” a list can be generated to briefly plan and outline the website areas that need to be worked upon.
Install “Drupal-check” and “Upgrade Rector,” which will assist you in resolving problems persisting in website modules.
If any of the tools on your project break, you must build a temporary project using Drupal 8 and move the modules from your main website to the temporary project environment.
Checking the host environment compatibility
Double-check your hosting environment to meet Drupal 9’s prerequisites & basic requirements. With the following reference list, you can check your environment compatibility too being with Drupal 9 upgradation:
[Note: For drush compatibility you can refer: Click here.]
Make sure your website’s current version is 8.8.x or 8.9.x before updating the core to Drupal 9. If any of the tools on your project break, you must build a temporary project using Drupal 8 and move the modules from your main website to the temporary project environment.
List all of the libraries and themes installed on your website, including custom themes. It’s possible that some of the libraries and themes have updated their versions. Make a list of all the libraries and themes that need to be upgraded to the most recent version.
In an excel spreadsheet, make a list of all the contributed and custom modules that are installed on your website. The “Upgrade status” module can help you find the modules. This module looks over your site and tells you which modules are compatible with Drupal 9 and recommends that you upgrade them to the current version if any have been published.
Upgrade Status also recommends that you uninstall any deactivated modules. All of this information should be documented and kept up to date.
When you use deprecated code, you will get warnings or problems. Use drupal-check to scan your website for obsolete code and generate a list of modules, themes, and libraries. If any of the functions you’re using have been deprecated, it will also propose a substitute.
List all of the problems that drupal-check has found in a document so that you may repair them more easily and in an efficiently planned manner.
Refer to the document you generated and update the libraries on your website to the most recent version that is Drupal 9 compliant. With the aid of the composer, you may update the libraries.
Update your website’s custom-created modules to Drupal 9’s most recent compatible version. Some of the deprecated problems found in step 6 may be automatically rectified after upgrading the modules, while others may persist.
If the issues persist after updating the module, and it is one of the custom modules, you may either discover and repair patches for those errors if one exists, or you can develop your own patch and contribute to the Drupal community.
If the problems are not causing any harm to your website, you can keep them until a new version of the module with the fixes corrected is published.
To create a patch for an existing issue: Click Here To Visit Reference
To apply a patch: Click Here To Visit Reference
Updating custom modules to make them Drupal 9 compliant necessitates manual code modifications. However, tools like “Upgrade Rector” can be utilized to give solutions for resolving faults discovered in step 6 or automate the correction of recognized mistakes.
Also, use drupal-check to see if any issues were missed by the “upgrade rector.”
Add a Drupal 9 compliant version of all custom modules after the issues have been addressed.
Update any custom themes on your website to Drupal 9’s most recent version. Some of the deprecated mistakes may be immediately rectified when upgrading the themes, while others may persist.
You can apply the fixes to the remaining faults or keep them until a new version of the theme is published with the errors corrected.
If your website uses custom themes, check that they don’t include any previous version code or mistakes that may prevent you from upgrading to Drupal 9.
With the aid of Drupal-check and upgrade rector, the issues may be resolved. Add a Drupal 9 compliant version of all custom themes after the issues have been corrected.
Uninstall all of the unneeded modules that the upgrade status module recommended. You always have the option to leverage Drupal composer to remove the old modules.
Finally, after the modules, themes, and libraries are Drupal 9 compliant, the Drupal core codebase may be upgraded to the stable version of Drupal 9.
Depending on whether your website uses “drupal/core” or “drupal/core-recommended,” you’ll need to update. “composer show drupal/core-recommended“ – This command will assist you in determining which package is being utilized.
The command will return detailed information about the package if “drupal/core-recommended” is installed; otherwise, it will produce a message saying “package drupal/core-recommended not found.”
If the project is using “drupal/core-recommended,” run the following command to upgrade the core codebase to Drupal 9’s newest stable version:
composer require ‘drupal/core-recommended:<version:name>’ — update-with-all-dependencies
If the project is utilizing “drupal/core,” run the following command to upgrade the core codebase to Drupal 9’s newest stable version:
composer require ‘drupal/core:<version:name>’ — update-with-dependencies
Following the successful upgrade of the Drupal core codebase, update the database to apply any needed upgrades.
Clear the cache and check the status report on the admin page: “Sitename/admin/reports/status” after the database has been refreshed.
The new version will be shown on the Status Report page.
Before attempting to update your site to Drupal 9, be sure that any custom code and/or themes are not utilizing any code that was deprecated in 8.8.x or earlier and will be removed in 9.0.x. Finally, upgrade the core codebase to Drupal 9 and execute update.php once every other component is Drupal 9 compatible.
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