Why this change?
By default the `db:create` Rake task in activerecord creates the
databases for both the development and test environment. This while
seemingly odd is by design from Rails. In order to avoid creating the
test database, Rails supports the `SKIP_TEST_DATABASE` environment
variable which we should respect when creating the multisite test
database.
Under exceptional cases people may need to resize the notification table.
This only happens on forums with a total of more than 2.5 billion notifications.
This rake task can be used to convert all the notification columns to
bigint to make more room.
## Without multisite.yml config
No change. `bin/rails db:create` / `db:migrate` / `db:drop` should work the same.
## With multisite.yml config
### db:create
`bin/rails db:create` creates development, test, and all databases from the multisite config
`RAILS_DB=[site] bin/rails db:create` creates the database for the specified site from the multisite config
### db:migrate
`bin/rails db:migrate` migrates the development database and all databases from the multisite config
`RAILS_ENV=test bin/rails db:migrate` migrates the test database and `discourse_test_multisite`
`RAILS_DB=[site] bin/rails db:migrate` migrates the database for the specified site from the multisite config
### db:drop
`bin/rails db:drop` drops development, test, and all databases from the multisite config
`RAILS_DB=[site] bin/rails db:create` drops the database for the specified site from the multisite config
This feature only was only demuxing stdout, not stderr. That means that stdout and stderr output appears out-of-order, and makes debugging migrations very confusing.
In future we may want to add stderr support to the demuxing. But right now, the concurrency variable is hard-coded to 1. Therefore the easiest fix is to bypass the demuxing.
Enabled extensions are not saved in backups and thus not created when
restoring a newer backup (that has a new extension) to an old site
(that does not have the migration).
* Revert "DEV: increase lock timeout for multisite migration (#14831)"
This partially reverts commit 337ef60303.
We need to revert the mutex around `db:status:json` because the mutex is not available unless the rails environment is loaded which the `db:status:json` doesn't load before the mutex. We can't load the environment before entering the mutex because the mutex is meant to prevent other instances of the task from loading a rails environment while the database is migrating.
Co-authored-by: David Taylor <david@taylorhq.com>
Co-authored-by: David Taylor <david@taylorhq.com>
In development we regularly restart/reload Rails, which wipes out the schema cache. This then has to be regenerated using DDL queries on the database.
Instead, we can make use of the `rake db:schema:cache:dump` command. This will dump the schema cache to a YAML file, and then load it when needed. This is significantly faster than rebuilding the cache from DDL queries every time.
This commit allows site admins to run theme tests in production via a new `/theme-qunit` route. When you visit `/theme-qunit`, you'll see a list of the themes/components installed on your site that have tests, and from there you can select a theme or component that you run its tests.
We also have a new rake task `themes:install_and_test` that can be used to install a list of themes/components on a temporary database and run the tests of the themes/components that are installed. This rake task can be useful when upgrading/deploying a Discourse instance to make sure that the installed themes/components are compatible with the new Discourse version being deployed, and if the tests fail you can abort the build/deploy process so you don't end up with a broken site.
This commit allows site admins to run theme tests in production via a new `/theme-qunit` route. When you visit `/theme-qunit`, you'll see a list of the themes/components installed on your site that have tests, and from there you can select a theme or component that you run its tests.
We also have a new rake task `themes:install_and_test` that can be used to install a list of themes/components on a temporary database and run the tests of the themes/components that are installed. This rake task can be useful when upgrading/deploying a Discourse instance to make sure that the installed themes/components are compatible with the new Discourse version being deployed, and if the tests fail you can abort the build/deploy process so you don't end up with a broken site.
Added a new task to test if indexes are coherent with a blank database
This allows us to detect for cases where somehow indexes are out of sync
FIX_INDEXES=1 or `rake db:validate_indexes[fix]` to correct the issues it finds.
Detects:
- Badly named indexes that need to be renamed
- Missing indexes
- Extra indexes
Can correct all 3 with the fix option
Added a small helper class to for seed data because we need to add the
same filter to multisite:migrate as we have in db:migrate. Having this
filter in both places means we can get rid of the SKIP_SEED flag.
A future-dated migration was accidently introduced by me in 45c399f0. This was removed in b9762afc, but other migrations had already been generated based on its incorrect date. This commit removes the offending data in the schema_migrations table, and corrects the version in the published_pages migration.
This commit also adds a check to db:migrate which raises an error when invalid migration timestamps are used.
This reverts commit 8b46f14744.
It corrects the reason for the revert:
We rely on SafeMigrate existing cause we call it from migrations,
Zeitwerk will autoload it.
Instead of previous pattern we explicitly bypass all the hacks in
production mode.
We need to disable SafeMigrate cause it is not thread safe.
A thread safe implementation is possible but not worth the effort,
we catch the issues in dev and test.
Previously we were migrating multisites serially, this is extremely slow
especially when 200 dbs are involved.
The new implementation defaults to running 20 migrations concurrently, leading
to a 20x speedup.
We also amended it so errors are printed out last, something that makes
debugging failures easier.
This is code specific to Discourse cause we integrate SeedFu with our
migrations and can not include this in the multisite gem.
If a migration performs no changes it should not output stuff.
Previously we would output information about seeds which was very noisy.
On multisite this was particularly bad
This used to work due to side effects.
`rake parallel:migrate` used to work very inconsistently and would only migrate
some of the databases.
This introduces the recommended change to db.yml so the correct database is
found based off TEST_ENV_NUMBER if for some reason we did not set it using
RAILS_DB
Also avoids a bunch of schema dumping which is not needed when migrating
parallel specs
DB number 1 is very odd cause for whatever reason parallel spec is not
setting it.
