Drupal 9

Drupal 9 Upgrade: Start to Finish

Good news: after all the sweat and blood of getting our site ready, the upgrade took all of 30 minutes. This really may be the easiest Drupal upgrade in a decade. It's still not for the faint of heart. Here's a quick recap on the steps necessary to do this upgrade. I'll be sure to link back to my previous articles so you can see the work and challenges involved with each step in detail.

Drupal 9 Up Front

Compared to all the work that went into prepping the site, the actual upgrade is a walk in the park. I'll be sure to cover the actual upgrade process in Step 5 of this article; I'd like to do a quick recap on the entire process, though--so, if you've already read my earlier Drupal 9 Upgrade posts, feel free to skip to Step 5. Otherwise, let's reconnect with what the basic steps are for a D8 to D9 upgrade.

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Drupal 9 Upgrade: Patching Modules 101

Not all contributed D8 modules have D9 compatibility built into their latest releases. More than a few, however, will have a patch available in their open issues that will get you there. I've had several occasions to patch a module, but it's not something I do with enough frequency to immediately recall how it's done. On the command line I often forget which is the right way to do it: git apply or patch?

Prepping for a Patch

As with all things Drupal--attention to detail is paramount. It's easy to get ahead of yourself when looking for and applying a module patch, but one of the first things you'll want to do when you find one is to ensure that the patch was built for the module version you're using. A patch is a file that applies very specific changes to an already existing file. If the existing file you have on your site (say, the info.yml file associated with a module) differs from the one the patch was created for, the patch will likely fail.

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Drupal 9 Upgrade: Composer and Drupal's Module Directory

It seems like a no-brainer to me, but I must have missed something. Why Drush, Drupal's admin UI and Composer would install modules into different directories by default is beyond me.

Default Module Directory

Where are modules really supposed to go, anyways? Here's what Drupal.org has to say:

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Drupal 9 Upgrade: Issues with Composer

The upgrade from Drupal 8 to 9 has been hailed by Drupal.org as the easiest upgrade in a decade. The first steps in the upgrade process look to be getting your testing environment in order... for me, that means working through a couple of nasty headaches with Composer (self inflicted... of course).

It's been a long couple of weeks...

... long...

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