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Rephrase entry with better sounding English.
[ci skip]
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Per the regression commit below, the commit changes the behavior of
`#changed?`to consult the `#changed_in_place?` method on `Type::Value` classes.
Per this change, `PostgreSQL::OID::Hstore` needs to override this method
in order to compare the deserialized forms of the two arguments. In
Ruby, two hashes are considered equal even if their key order is
different. This commit helps to bring that behavior to `Hstore` values.
Fixes regression introduced by 8e633e505880755e7e366ccec2210bbe2b5436e7
Fixes #27502
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find and exists?
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In f1a0fa9 we moved backend specific timestamp behavior out of the type
and into the adapter. This was in line with our general attempt to
reduce the number of adapter specific type subclasses. However, on PG,
the array type performs all serialization, including database encoding
in its serialize method.
This means that we have converted the value into a string before
reaching the database, so no adapter specific logic can be applied (and
this also means that timestamp arrays were using the default `.to_s`
method on the given object, which likely meant timestamps were being
ignored in certain cases as well)
Ultimately I want to do a more in depth refactoring which separates
database serializer objects from the active model type objects, to give
us a less awkward API for introducing the attributes API onto Active
Model.
However, in the short term, we follow the solution we've applied
elsewhere for this. Move behavior off of the type and into the adapter,
and use a data object to allow the type to communicate information up
the stack.
Fixes #27514.
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We faced a significant performance decrease when we started using STI
without storing full namespaced class name in type column (because of PostgreSQL
length limit for ENUM types).
We realized that the cause of it is the slow STI model instantiation. Problematic
method appears to be `ActiveRecord::Base.compute_type`, which is used to find
the right class for STI model on every instantiation.
It builds an array of candidate types and then iterates through it calling
`safe_constantize` on every type until it finds appropriate constant. So if
desired type isn't the first element in this array there will be at least one
unsuccessful call to `safe_constantize`, which is very expensive, since it's
defined in terms of `begin; rescue; end`.
This commit is an attempt to speed up `compute_type` method simply by caching
results of previous calls.
```ruby
class MyCompany::MyApp::Business::Accounts::Base < ApplicationRecord
self.table_name = 'accounts'
self.store_full_sti_class = false
end
class MyCompany::MyApp::Business::Accounts::Free < Base
end
class MyCompany::MyApp::Business::Accounts::Standard < Base
# patch .compute_type there
end
puts '======================= .compute_type ======================='
Benchmark.ips do |x|
x.report("original method") do
MyCompany::MyApp::Business::Accounts::Free.send :compute_type, 'Free'
end
x.report("with types cached") do
MyCompany::MyApp::Business::Accounts::Standard.send :compute_type, 'Standard'
end
x.compare!
end
```
```
======================= .compute_type =======================
with types cached: 1529019.4 i/s
original method: 2850.2 i/s - 536.46x slower
```
```ruby
5_000.times do |i|
MyCompany::MyApp::Business::Accounts::Standard.create!(name: "standard_#{i}")
end
5_000.times do |i|
MyCompany::MyApp::Business::Accounts::Free.create!(name: "free_#{i}")
end
puts '====================== .limit(100).to_a ======================='
Benchmark.ips do |x|
x.report("without .compute_type patch") do
MyCompany::MyApp::Business::Accounts::Free.limit(100).to_a
end
x.report("with .compute_type patch") do
MyCompany::MyApp::Business::Accounts::Standard.limit(100).to_a
end
x.compare!
end
```
```
====================== .limit(100).to_a =======================
with .compute_type patch: 360.5 i/s
without .compute_type patch: 24.7 i/s - 14.59x slower
```
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* Refactor to use `touch_updates`
Ensures we only call `current_time_from_proper_timezone` from one place.
* Clarify touch default in tests.
Not interested in what happens when passed false but that
nothing passed means no touching.
* Backdate touched columns in tests.
We can't be sure a test progresses through time, so our
touching code may be working correctly but the test
itself is brittle.
Fix by backdating that's further in the past akin to
what the timestamps tests do:
https://github.com/rails/rails/blob/d753645d40e925973724e4c3a8617b654da90e41/activerecord/test/cases/timestamp_test.rb#L17
* Expand changelog entry.
Elaborate and show examples.
Closes #26995.
[ Jarred Trost & Kasper Timm Hansen ]
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[ci skip]
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[ci skip]
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provided.
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[ *Kasper Timm Hansen* & *Kir Shatrov* ]
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[ci skip]
- add period where necessary
- add backticks where necessary
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make sql statements frozen
dup if arel is not our string
expect runtime error
dont wrap runtime error in invalid
log errors will now be treated as runtime errors
update changelog
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[ci skip]
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Race conditions can occur when an ActiveRecord is destroyed
twice or destroyed and updated. The callbacks should only be
triggered once, similar to a SQL database trigger.
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Moved database-specific ActiveModel types into ActiveRecord
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ie. DecimalWithoutScale, Text and UnsignedInteger
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- If aliased, then use the aliased attribute name.
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- If aliased, then use the aliased attribute name.
- Fixes #26417.
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The alternative is escaping it but moving around the text seems a bit simpler.
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While working on updating Paper Trail for 5.1 compatibility, I noticed
that I was required to pass a second argument to `attribute`. I didn't
intend for this to be the case, as `attribute :foo` is totally
reasonable shorthand for "I want `attr_accessor :foo`, but also have it
work with things like `.attributes` and `ActiveRecord::Dirty`"
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Fixes #27125.
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https://gist.github.com/sergey-alekseev/946657ebdb5e58d1bee115714056ec96
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Fixes casting of IDs to the data type of the association primary key,
rather than then the data type of the model's primary key. (Tests use a
string primary key on the association, rather than an int.)
Tests issue #20995
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