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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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Tighten up the AV::Base constructor
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The AV::Base constructor was too complicated, and this commit tightens
up the parameters it will take. At runtime, AV::Base is most commonly
constructed here:
https://github.com/rails/rails/blob/94d54fa4ab641a0ddeb173409cb41cc5becc02a9/actionview/lib/action_view/rendering.rb#L72-L74
This provides an AV::Renderer instance, a hash of assignments, and a
controller instance. Since this is the common case for construction, we
should remove logic from the constructor that handles other cases. This
commit introduces special constructors for those other cases.
Interestingly, most code paths that construct AV::Base "strangely" are
tests.
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Part 8: Multi db improvements, Adds basic automatic database switching to Rails
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The following PR adds behavior to Rails to allow an application to
automatically switch it's connection from the primary to the replica.
A request will be sent to the replica if:
* The request is a read request (`GET` or `HEAD`)
* AND It's been 2 seconds since the last write to the database (because
we don't want to send a user to a replica if the write hasn't made it
to the replica yet)
A request will be sent to the primary if:
* It's not a GET/HEAD request (ie is a POST, PATCH, etc)
* Has been less than 2 seconds since the last write to the database
The implementation that decides when to switch reads (the 2 seconds) is
"safe" to use in production but not recommended without adequate testing
with your infrastructure. At GitHub in addition to the a 5 second delay
we have a curcuit breaker that checks the replication delay
and will send the query to a replica before the 5 seconds has passed.
This is specific to our application and therefore not something Rails
should be doing for you. You'll need to test and implement more robust
handling of when to switch based on your infrastructure. The auto
switcher in Rails is meant to be a basic implementation / API that acts
as a guide for how to implement autoswitching.
The impementation here is meant to be strict enough that you know how to
implement your own resolver and operations classes but flexible enough
that we're not telling you how to do it.
The middleware is not included automatically and can be installed in
your application with the classes you want to use for the resolver and
operations passed in. If you don't pass any classes into the middleware
the Rails default Resolver and Session classes will be used.
The Resolver decides what parameters define when to
switch, Operations sets timestamps for the Resolver to read from. For
example you may want to use cookies instead of a session so you'd
implement a Resolver::Cookies class and pass that into the middleware
via configuration options.
```
config.active_record.database_selector = { delay: 2.seconds }
config.active_record.database_resolver = MyResolver
config.active_record.database_operations = MyResolver::MyCookies
```
Your classes can inherit from the existing classes and reimplment the
methods (or implement more methods) that you need to do the switching.
You only need to implement methods that you want to change. For example
if you wanted to set the session token for the last read from a replica
you would reimplement the `read_from_replica` method in your resolver
class and implement a method that updates a new timestamp in your
operations class.
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eileencodes/fix-case-when-url-in-url-config-is-nil
Fix case when we want a UrlConfig but the URL is nil
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Previously if the `url` key in a config hash was nil we'd ignore the
configuration as invalid. This can happen when you're relying on a
`DATABASE_URL` in the env and that is not set in the environment.
```
production:
<<: *default
url: ENV['DATABASE_URL']
```
This PR fixes that case by checking if there is a `url` key in the
config instead of checking if the `url` is not nil in the config.
In addition to changing the conditional we then need to build a url hash
to merge with the original hash in the `UrlConfig` object.
Fixes #35091
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Remove unused code
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- Remove `fragment_cache_key` helper declaration.
It was removed in e70d3df7c9b05c129b0fdcca57f66eca316c5cfc
- Remove `by_private_lifo`.
It is unused since a7becf147afc85c354e5cfa519911a948d25fc4d
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Add HashWithIndifferentAccess#assoc
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3.5.2 (September 07, 2017) is a little older.
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https://travis-ci.org/rails/rails/jobs/486285170#L1349-L1366
```
% git grep -n DrivenBySeleniumWith
test/abstract_unit.rb:374:class DrivenBySeleniumWithChrome < ActionDispatch::SystemTestCase
test/abstract_unit.rb:378:class DrivenBySeleniumWithHeadlessChrome < ActionDispatch::SystemTestCase
test/abstract_unit.rb:382:class DrivenBySeleniumWithHeadlessFirefox < ActionDispatch::SystemTestCase
test/dispatch/system_testing/screenshot_helper_test.rb:10: new_test = DrivenBySeleniumWithChrome.new("x")
test/dispatch/system_testing/screenshot_helper_test.rb:18: new_test = DrivenBySeleniumWithChrome.new("x")
test/dispatch/system_testing/screenshot_helper_test.rb:28: new_test = DrivenBySeleniumWithChrome.new("x")
test/dispatch/system_testing/screenshot_helper_test.rb:40: new_test = DrivenBySeleniumWithChrome.new("x")
test/dispatch/system_testing/screenshot_helper_test.rb:48: new_test = DrivenBySeleniumWithChrome.new("x")
test/dispatch/system_testing/screenshot_helper_test.rb:62: new_test = DrivenBySeleniumWithChrome.new("x")
test/dispatch/system_testing/screenshot_helper_test.rb:76:class SeleniumScreenshotsTest < DrivenBySeleniumWithChrome
test/dispatch/system_testing/system_test_case_test.rb:11:class OverrideSeleniumSubclassToRackTestTest < DrivenBySeleniumWithChrome
test/dispatch/system_testing/system_test_case_test.rb:19:class SetDriverToSeleniumTest < DrivenBySeleniumWithChrome
test/dispatch/system_testing/system_test_case_test.rb:25:class SetDriverToSeleniumHeadlessChromeTest < DrivenBySeleniumWithHeadlessChrome
test/dispatch/system_testing/system_test_case_test.rb:31:class SetDriverToSeleniumHeadlessFirefoxTest < DrivenBySeleniumWithHeadlessFirefox
test/dispatch/system_testing/system_test_case_test.rb:49:class UndefMethodsTest < DrivenBySeleniumWithChrome
```
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But `NameError: uninitialized constant ActionDispatch::SystemTesting::Browser::Selenium`
is pretty confused. I've little improved missing constant error to
`NameError: uninitialized constant Selenium`.
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https://travis-ci.org/rails/rails/jobs/486155626#L1317-L1335
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Update Sneakers to the latest version
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Sneakers 2.11.0 has a more recent Bunny dependency which squashes some
Ruby 2.6 warnings tickled by ActiveJob tests.
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Add ActionCable channel/connection load hooks
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[UPDATED] Implement a way to add browser capabilities
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This is a minor update to the named methods for the following:
- s/desired_capabilities/capabilities
- s/driver_options/capabilities
Since they are all the same thing we should keep the name the same
throughout the feature.
Updated docs to match / be a little bit clearer
Also updated the Gemfile for selenium-webdriver.
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* There is currently no way to define specific browser capabilities since our SystemTest driver override the `option` key [Ref](https://github.com/rails/rails/blob/a07d0680787ced3c04b362fa7a238c918211ac70/actionpack/lib/action_dispatch/system_testing/driver.rb#L35)
This option key is used internally by selenium to add custom capabilities on the browser.
Depending on the Browser, some option are allowed to be passed inside a hash, the driver takes care of setting whatever you passed on the driver option. An example [here](https://github.com/rails/rails/blob/a07d0680787ced3c04b362fa7a238c918211ac70/actionpack/lib/action_dispatch/system_testing/driver.rb#L35) where you are allowed to pass args such as `--no-sandbox` etc
However this behavior was only meant for backward compatibility and as you can see it's deprecated.
The non-deprecated behavior is to create a `<Driver>::Option` object containing all the capabilities we want. This is what we [currently do](https://github.com/rails/rails/blob/a07d0680787ced3c04b362fa7a238c918211ac70/actionpack/lib/action_dispatch/system_testing/browser.rb#L34-L36) when chrome or firefox are in headless mode.
This PR allows to pass a block when calling `driven_by`, the block will be pased a `<Driver>::Option` instance. You can modify this object the way you want by adding any capabilities. The option object will be then passed to selenium.
```ruby
driven_by :selenium, using: :chrome do |driver_option|
driver_option.add_argument('--no-sandbox')
driver_option.add_emulation(device: 'iphone 4')
end
```
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Activejob typo fixes.
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MySQL: Support `:size` option to change text and blob size
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In MySQL, the text column size is 65,535 bytes by default (1 GiB in
PostgreSQL). It is sometimes too short when people want to use a text
column, so they sometimes change the text size to mediumtext (16 MiB) or
longtext (4 GiB) by giving the `limit` option.
Unlike MySQL, PostgreSQL doesn't allow the `limit` option for a text
column (raises ERROR: type modifier is not allowed for type "text").
So `limit: 4294967295` (longtext) couldn't be used in Action Text.
I've allowed changing text and blob size without giving the `limit`
option, it prevents that migration failure on PostgreSQL.
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Fix usage documentation in VideoAnalyzer
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The code snippet within the usage documentation comment used the wrong object namespace for the ActiveStorage::Analyzer::VideoAnalyzer
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Add line break to Action Text installation outputs
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The Action Text installations appends `require("trix")` to the application.js file. The problem is that there isn't a line break in the beginning of the installation output, leading to syntax errors, e.g.:
```
import './application.scss'require("trix")
```
This commit moves the line break from the end to the beginning of the output, fixing it to:
```
import './application.scss'
require("trix")
```
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More Read-Only Changes
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That method doesn't exist on LookupContext, so the delegate doesn't make
sense.
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We can remove the ivar by caching the digest on the stack
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This gets the PartialRenderer to be a bit closer to the
TemplateRenderer. TemplateRenderer already keeps its template in a
local variable.
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This method is private, and we always pass something in.
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Similar to 1853b0d0abf87dfdd4c3a277c3badb17ca19652e
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This reduces the surface area of our API and removes a Liskov issue.
Both TemplateRenderer and PartialRenderer inherit from AbstractRenderer,
but since PartialRenderer implements it's own `find_template` that is
private, and has the wrong method signature, an instance of
PartialRenderer cannot be substituted for an instance of
AbstractRenderer renderer. Removing the superclass implementation
solves both issues.
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This patch changes `with_fallbacks` to be a factory method that returns
a new instance of a lookup context which contains the fallback view
paths in addition to the controller specific view paths. Since the
lookup context is more "read only", we may be able to cache them
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This reverts commit 30f666f87ab873258b797b39f29cf852f7621bea.
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