This patch removes two freedom patches:
- `mail_disable_starttls.rb`: this has been fixed in the 2.8 release of
the mail gem, so we don’t need it anymore.
- `rails4.rb`: those methods have been deprecated for a while now and
should have been dropped with Discourse v3.2.
Why this change?
Previously, we identified that ActiveRecord's PostgreSQL adapter
executes 3 db queries each time a new connection is created. The 3 db
queries was identified when we looked at the `pg_stats_statement` table
on one of our multisite production cluster. At that time, the hypothesis
is that because we were agressively reaping and creating connections,
the db queries executed each time a connection is created is wasting
resources on our database servers. However, we didn't see any the needle
move much on our servers after deploying the patch so we have decided to
drop this patch as it makes it harder for us to upgrade ActiveRecord in
the future.
Why this change?
This is a follow up to 408d2f8e69. When
`ActiveRecord::ConnectionAdapaters::PostgreSQLAdatper#reload_type_map`
is called, we need to clear the type map cache otherwise migrations
adding an array column will end up throwing errors.
Why this change?
This patch has been added to address the problems identified in https://github.com/rails/rails/issues/35311. For every,
new connection created using the PostgreSQL adapter, 3 queries are executed to fetch type map information from the `pg_type`
system catalog, adding about 1ms overhead to every connection creation.
On multisite clusters where connections are reaped more aggressively, the 3 queries executed
accounts for a significant portion of CPU usage on the PostgreSQL cluster. This patch works around the problem by
caching the type map in a class level attribute to reuse across connections.
Upstream added a capital 'T' to the 'Translation missing' message in https://github.com/ruby-i18n/i18n/commit/c5c6e753f3. This caused our translate accelerator patch to diverge, and the change in case affected a number of our specs. This commit updates the translate accelerator to match the upstream casing, and introduces a spec to detect future divergence.
Following the Rails 7 upgrade, the `DISCOURSE_SMTP_ENABLE_START_TLS`
setting doesn’t work anymore. This is because Rails upgraded the
`net-smtp` gem to the 0.3.1 version which enables `starttls` by default.
The `mail` gem doesn’t support this new behavior yet and doesn’t know
how to disable TLS. This should be fixed in an upcoming release.
Meanwhile applying this patch allows us to get back the previous
behavior which is expected by many.
This happened only for languages other than "en" and when `I18n.t` was called without any interpolation keys. The lib still tried to interpolate keys because it interpreted the `overrides` option as interpolation key.
It's very easy to forget to add `require 'rails_helper'` at the top of every core/plugin spec file, and omissions can cause some very confusing/sporadic errors.
By setting this flag in `.rspec`, we can remove the need for `require 'rails_helper'` entirely.
