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These are for internal use only and cannot be relied on as part of the
public API. See discussion on 8c2c60511beaad05a218e73c4918ab89fb1804f0.
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Inheritance#discriminate_class_for_record handle STI lookup duties.
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Allows you to do BaseClass.new(:type => "SubClass") as well as
parent.children.build(:type => "SubClass") or parent.build_child
to initialize an STI subclass. Ensures that the class name is a
valid class and that it is in the ancestors of the super class
that the association is expecting.
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Rather than just raising a NoMethodError when copying the config, this
commit adds a warning message until either the rails-observers gem is
installed or the relevant config options are removed.
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They was extracted from a plugin.
See https://github.com/rails/rails-observers
[Rafael Mendonça França + Steve Klabnik]
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Fixes #7418.
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We are already in the AR namespace, there's no way for it to be
undefined. See the cousin commit 13e72db77063f57c3028a906690d42fb068845bb
Refactor a bit teardown fixtures to avoid two conditionals.
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Setting a nil datetime attribute to a blank string should not cause the
attribute to be dirty.
Fix #8310
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prevent mass assignment of polymorphic type when using `build`
Conflicts:
activerecord/CHANGELOG.md
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Closes #8265
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Since edd94cee9af1688dd036fc58fd405adb30a5e0da, CollectionProxy
delegates all calculation methods - except count - to the scope,
which does basically what this method was doing, but since we're
delegating from the proxy, the association method was never called.
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To perform a sum calculation over the array of elements, use to_a.sum(&block).
Please check the discussion in f9cb645dfcb5cc89f59d2f8b58a019486c828c73
for more context.
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This reverts commit f9cb645dfcb5cc89f59d2f8b58a019486c828c73.
Conflicts:
activerecord/CHANGELOG.md
Revert "Allow blocks for count with ActiveRecord::Relation. Document and test that sum allows blocks"
This reverts commit 9cc2bf69ce296b7351dc612a8366193390a305f3.
Conflicts:
activerecord/lib/active_record/relation/calculations.rb
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This improves memory and performance without having to use symbols which
present DoS problems. Thanks @headius and @tenderlove for the
suggestion.
This was originally committed in
f1765019ce9b6292f2264b4601dad5daaffe3a89, and then reverted in
d3494903719682abc0948bef290af0d3d7b5a440 due to it causing problems in a
real application. This second attempt should solve that.
Benchmark
---------
require 'active_record'
require 'benchmark/ips'
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
class Post < ActiveRecord::Base
connection.create_table :posts, force: true do |t|
t.string :name
end
end
post = Post.create name: 'omg'
Benchmark.ips do |r|
r.report('Post.new') { Post.new name: 'omg' }
r.report('post.name') { post.name }
r.report('post.name=') { post.name = 'omg' }
r.report('Post.find(1).name') { Post.find(1).name }
end
Before
------
Calculating -------------------------------------
Post.new 1419 i/100ms
post.name 7538 i/100ms
post.name= 3024 i/100ms
Post.find(1).name 243 i/100ms
-------------------------------------------------
Post.new 20637.6 (±12.7%) i/s - 102168 in 5.039578s
post.name 1167897.7 (±18.2%) i/s - 5186144 in 4.983077s
post.name= 64305.6 (±9.6%) i/s - 317520 in 4.998720s
Post.find(1).name 2678.8 (±10.8%) i/s - 13365 in 5.051265s
After
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Calculating -------------------------------------
Post.new 1431 i/100ms
post.name 7790 i/100ms
post.name= 3181 i/100ms
Post.find(1).name 245 i/100ms
-------------------------------------------------
Post.new 21308.8 (±12.2%) i/s - 105894 in 5.053879s
post.name 1534103.8 (±2.1%) i/s - 7634200 in 4.979405s
post.name= 67441.0 (±7.5%) i/s - 337186 in 5.037871s
Post.find(1).name 2681.9 (±10.6%) i/s - 13475 in 5.084511s
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Coerce strings in create_join_table.
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If you accidentally pass a string and a symbol, this breaks. So
we coerce them both to strings.
Fixes #7715
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Postgresql adapter: fix handling of BC timestamps
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AR::Base.becomes should not change the STI type
Conflicts:
activerecord/CHANGELOG.md
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If you want to change the STI type too, use AR::Base.becomes! instead
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The `ActiveRecord::Fixtures::find_table_name` method was removed from "master" almost a year ago, but it was never deprecated. Here it comes back, more dead than alive.
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Conflicts:
actionpack/lib/action_dispatch/routing/redirection.rb
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`#pluck` can be used on a relation with `select` clause (#7551)
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Closes #7551
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Thanks @toretore.
https://github.com/rails/rails/commit/9e4c41c903e8e58721f2c41776a8c60ddba7a0a9#commitcomment-2134706
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Two threads may be in method_missing at the same time. If so, they might
both try to define the same delegator method.
Such a situation probably wouldn't result in a particularly spectacular
bug as one method would probably just be overridden by an identical
method, but it could cause warnings to pop up. (It could be worse if
method definition is non-atomic in a particular implementation.)
(We will also need this mutex shortly anyway, see #8127.)
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We should not need any `serialized_attributes` checks outside `ActiveRecord::AttributeMethods::Serialization` module.
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