Drupal 9 was released on June 3rd and I have been wanting to upgrade my site since then. And now I have. It was quite simple. All I had to do was follow the blog written by Dries on Drupal.org: https://www.drupal.org/docs/upgrading-drupal/upgrading-from-drupal-8-to-drupal-9-or-higher.
Let me show you..
# From the blog above. chmod 777 docroot/sites/default/ chmod 777 -R docroot/sites/default/ # FYI I use lando for development. lando composer require drupal/core-recommended:^9.0.0 drupal/core-composer-scaffold:^9.0.0 --update-with-dependencies --no-update lando composer update lando composer why drupal-composer/drupal-scaffold lando composer remove drupal-composer/drupal-scaffold # Making sure drupal/core-dev is under require_dev lando composer require drupal/core-dev:^9.0.0 --dev --update-with-dependencies --no-update lando composer update # Some dependencies were unmet so the blog recommends to do this. lando composer require "drupal/core:9.0.0 as 8.9.0" --no-update && lando composer update # Remove blt temporarily. lando composer remove acquia/blt --no-update lando composer update # Add the supported version of devel. lando composer require drupal/devel:^3.0 --no-update lando composer update lando composer remove drupal/devel_generate --no-update lando composer update # Remove drupal/console temporarily. lando composer remove drupal/console --no-update lando composer update # Need to include the right version = 4. lando composer require symfony/dom-crawler:^4 --no-update lando composer update lando drush updb # Debugging lando drush updb --debug # A patch is required for jsonapi_extras to work properly. # Here it is: https://www.drupal.org/files/issues/2020-06-12/jsonapi_extras-drupal9-compatibility-3147876-6.patch lando composer update drupal/jsonapi_extras git status git checkout -b 9.x lando drush cr # The service path.alias_manager does not exists. Instead use path_alias.manager. # I submitted patches for all incompatible modules that I use. grep -rn 'path.alias_manager' docroot/modules/contrib/ lando drush cr grep -rn 'path.alias_manager' docroot/modules/contrib/ clear grep -rn 'path.alias_manager' docroot/modules/contrib/ lando drush cr lando composer install # Reverting file permissions. sudo chmod 600 docroot/sites/default/settings* git status sudo chmod 600 docroot/sites/default/services.yml lando drush ws sudo chmod 777 docroot/sites/default/files/ sudo chmod 777 -R docroot/sites/default/files/ # Copied the history to document it later here. history
Most of the contributed modules I have used have either had a Drupal 9 compatible release or a supporting dev version. But here are the ones that had deprecated code.
"patches": {
"drupal/ckeditor_lineheight": {
"Change plugin path": "https://www.drupal.org/files/issues/2018-11-21/2956943_ckeditor_lineheight_library_path.patch"
},
"drupal/jsonapi_extras": {
"Drupal 9 compatibility": "https://www.drupal.org/files/issues/2020-06-12/jsonapi_extras-drupal9-compatibility-3147876-6.patch"
},
"drupal/rest_menu_items": {
"Drupal 9 compatibility": "https://www.drupal.org/files/issues/2020-06-10/dupal9-path-alias-3150452-2.patch"
},
"drupal/disqus": {
"Drupal 9 compatibility": "https://www.drupal.org/files/issues/2020-06-10/D9-readiness-3143716-5.patch"
},
"drupal/fontyourface": {
"Drupal 9 compatibility": "https://www.drupal.org/files/issues/2020-05-23/fontyourface-3042792-9.patch"
},
"drupal/login_security": {
"Drupal 9 compatibility": "https://www.drupal.org/files/issues/2020-06-04/3042720-9_0.patch"
}
}
Feel free to use the patches and let me know if I missed something. I am still solving certain issues on the XML sitemap module, but overall it's looking good and some of the custom features I implemented are working quite well. Since I was already using PHP 7.4, it was quite easy to transition to Drupal 9. Feel free to ask questions (in the comments section) if you have problems upgrading.
Huzzah!
