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This change ensures that all query cahces are cleared across all
connections per handler for the current thread so if you write on one
connection the read will have the query cache cleared.
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eileencodes/allow-application-to-change-handler-names
Add ability to change the names of the default handlers
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When I wrote the `connected_to` and `connects_to` API's I wrote them
with the idea in mind that it didn't really matter what the
handlers/roles were called as long as those connecting to the roles knew
which one wrote and which one read.
With the introduction of the middleware Rails begins to assume it's
`writing` and `reading` and there's no room for other roles. At GitHub
we've been using this method for a long time so we have a ton of legacy
code that uses different handler names `default` and `readonly`. We
could rename all our code but I think this is better for a few reasons:
- Legacy apps that have been using multiple databases for a long time
can have an eaiser time switching.
- If we later find this to cause more issues than it's worth we can
easily deprecate.
- We won't force old apps to rewrite the resolver middleware just to use
a different handler.
Adding the writing_role/reading_role required that I move the code that
creates the first handler for writing to the railtie. If I didn't move
this the core class would assign the handler before I was able to assign
a new one in my configuration and I'd end up with 3 handlers instead of
2.
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Fix and update template_missing image in guide
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This commit updates the Missing Template image in the Getting Started
Guide.
The new image displays the current error message. Additionally:
- New image is a PNG file, whereas the current image is in fact a misnamed JPEG.
- New image is smaller.
Before:
```
$ file --mime -b template_is_missing_articles_new.png
image/jpeg; charset=binary
$ du -h template_is_missing_articles_new.png
464K template_is_missing_articles_new.png
```
After:
```
$ file --mime -b template_is_missing_articles_new.png
image/png; charset=binary
$ du -h template_is_missing_articles_new.png
28K template_is_missing_articles_new.png
```
[ci-skip]
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Hint at advanced options for foreign_key
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We sometimes display simple examples of additional parameters that can be
supplied to table-wise methods like these and I found it particularly difficult
to figure out which options `t.foreign_key` accepts without drilling very deep
into the specific SchemaStatements docs.
Since it's relatively common to create foreign keys with custom column names or
primary keys, it seems like this should help quite a few people.
[ci skip]
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Use consistent hash syntax for routes
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[ci skip]
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Introduce a file type template
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This commit passes the mutated source to the template handler as a
parameter and deprecates the old handlers. Old handlers required that
templates contain a reference to mutated source code, but we would like
to make template objects "read only". This change lets the template
remain "read only" while still giving template handlers access to the
source code after mutations.
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Every template that specifies a "virtual path" loses the template source
when the template gets compiled:
https://github.com/rails/rails/blob/eda0f574f129fcd5ad1fc58b55cb6d1db71ea95c/actionview/lib/action_view/template.rb#L275
The "refresh" method seems to think that the source code for a template
can be recovered if there is a virtual path:
https://github.com/rails/rails/blob/eda0f574f129fcd5ad1fc58b55cb6d1db71ea95c/actionview/lib/action_view/template.rb#L171-L188
Every call site that allocates a template object *and* provides a
"virtual path" reads the template contents from the filesystem:
https://github.com/rails/rails/blob/eda0f574f129fcd5ad1fc58b55cb6d1db71ea95c/actionview/lib/action_view/template/resolver.rb#L229-L231
Templates that are inline or literals don't provide a "virtual path":
https://github.com/rails/rails/blob/eda0f574f129fcd5ad1fc58b55cb6d1db71ea95c/actionview/lib/action_view/renderer/template_renderer.rb#L34
This commit introduces a `FileTemplate` type that subclasses `Template`.
The `FileTemplate` keeps a reference to the filename, and reads the
source from the filesystem. This effectively makes the template source
immutable.
Other classes depended on the source to be mutated while being compiled,
so this commit also introduces a temporary way to pass the mutated
source to the ERB (or whatever) compiler. See `LegacyTemplate`.
I think we should consider it an error to provide a virtual path on a
non file type template an non-file templates can't recover their source.
Here is an example:
https://github.com/rails/rails/blob/eda0f574f129fcd5ad1fc58b55cb6d1db71ea95c/actionview/lib/action_view/testing/resolvers.rb#L53
This provides a "virtual path" so the source code (a string literal) is
thrown away after compilation. Clearly we can't recover that string, so
I think this should be an error.
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Make Notifications::Fanout faster after changing subscriptions
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When adding/removing a subscription with a string pattern, it isn't
necessary to clear the entire cache, only the cache for the key being
added.
When adding/removing subscriptions for a regex or to match all events,
the full cache is still cleared.
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Previously we stored all subscribers in an array, and every time a new
message name came in asked each subscriber if they responded to the
message.
This commit changes Fanout to hash subscribers with a String pattern by
their pattern. This way we can look them up directly and only do the
O(N) scan over the non-string (Regex or any) patterns.
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Refactor options for database selector middleware
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Right now we only have one option that's supported, the delay. However I
can see us supporting other options in the future.
This PR refactors the options to get passed into the resolver so whether
you're using middleware or using the config options you can pass options
to the resolver. This will also make it easy to add new options in the
future.
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Eagerly materialize the fixtures transaction
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The transaction used to restore fixtures is an implementation detail
that should be abstracted away. Idealy a test should behave the same
wether or not transactional fixtures are enabled.
However since transactions have been made lazy, the fixture
transaction started leaking into tests case. e.g. consider the
following (oversimplified) test:
```ruby
class SQLSubscriber
attr_accessor :sql
def initialize
@sql = []
end
def call(*, event)
sql << event[:sql]
end
end
subscriber = SQLSubscriber.new
ActiveSupport::Notifications.subscribe("sql.active_record", subscriber)
User.connection.execute('SELECT 1', 'Generic name')
assert_equal ['SELECT 1'], subscriber.sql
```
On Rails 6 it starts to break because the `sql` array will be `['BEGIN', 'SELECT 1']`.
Several things are wrong here:
- That transaction is not generated by the tested code, so it shouldn't be visible.
- The transaction is not even closed yet, which again doesn't reflect the reality.
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ActiveSupport typo fixes.
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include the content type when uploading to S3
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Railties typo fixes.
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* Fix broken format.
* Need to specify driver to the first argument of `driven_by`.
* `add_emulation` doesn't have `device` keyword. Ref: https://github.com/SeleniumHQ/selenium/blob/master/rb/lib/selenium/webdriver/chrome/options.rb#L142-L162
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Related 5754a29a974d31cab2b4392716b9825a3d910a69.
And follows Ruby standard library style https://github.com/ruby/ruby/commit/3406c5d.
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Fix has_many through association creation
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This reverts commit ed1eda271c7ac82ecb7bd94b6fa1b0093e648a3e, reversing
changes made to 3d2caab7dc92a13d4dd369678d5b4ce659df8e52.
Reason: 7c3da6e0030aa080fcb89af58b094ed50d861a44
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#33729 affected the behavior of the has_many through record creation.
Since #33729, the intermediate reflection of simple has_many through
association has `inverse_of` to the association, it causes extra through
record creation, the extra through record required valid before the
association record is saved.
https://github.com/rails/rails/blob/23125378673bcc606b274027666a126573e136f8/activerecord/lib/active_record/associations/has_many_through_association.rb#L95-L102
I think that #33729 need to more work to care about has_many through
association, that PR should be reverted to not break existing apps.
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Remove unused attr_writers `visitor` and `indexes`
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I deprecated two unused attr_writers `visitor` and `indexes` at 8056fe0
and f4bc364 conservatively, since those are accidentaly exposed in the
docs.
https://api.rubyonrails.org/v5.2/classes/ActiveRecord/ConnectionAdapters/AbstractAdapter.html
https://api.rubyonrails.org/v5.2/classes/ActiveRecord/ConnectionAdapters/TableDefinition.html
But I've found that `view_renderer` attr_writer is removed without
deprecation at #35093, that is also exposed in the doc.
https://api.rubyonrails.org/v5.2/classes/ActionView/Base.html
I'd like to also remove the deprecated attr_writers since I think that
removing `visitor` and `indexes` attr_writers is as safe as removing
`view_renderer` attr_writer.
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Make the backquote operator always return a string
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ActiveSupport overrides `` Kernel#` `` so that it would not raise
`Errno::ENOENT` but return `nil` instead (due to the last statement
`STDERR.puts` returning nil) if a given command were not found.
Because of this, you cannot safely say somthing like
`` `command`.chomp `` when ActiveSupport is loaded.
It turns out that this is an outdated monkey patch for Windows
platforms to emulate Unix behavior on an ancient version of Ruby, and
it should be removed by now.
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ActiveRecord typo fixes. [ci skip]
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ActiveStorage typo fix.
[ci skip]
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abhaynikam/35073-fix-automatic-database-switching-doc-typo
Fix typo: inherts -> inherits [ci skip]
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We enabled `Style/RedundantBegin` cop at #34764, but it is hard to
detect an offence if returning value put after the block.
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This fixes following warning.
```
warning: Passing safe_level with the 2nd argument of ERB.new is deprecated. Do not use it, and specify other arguments as keyword arguments.
```
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Write update_last_write_timestamp after request
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We need to update using the timestamp from the end of the request, not
the start. For example, if a request spends 5+ seconds writing, we still
want to wait another 5 seconds for replication lag.
Since we now run the update after we yield, we need to use ensure to
make sure we update the timestamp even if there is an exception.
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ActiveModel typo fixes.
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Don't add `RAILS_ENV` in generate action
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In the case of generator, `RAILS_ENV` is interpreted as an argument as it
is. Avoid this because it will result unintended by the user.
Fixes #34979.
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