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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.
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
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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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This reverts commit 86c3dfbd47cb96af02daaa655963292b1a1b110e.
Conflicts:
activerecord/lib/active_record/attribute_methods/read.rb
Reason: whilst this increased performance, it also presents a DoS risk
via memory exhaustion if users were allowing user input to dictate the
arguments of read/write_attribute. I will investigate alternative ways
to cut down on string allocations here.
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Without eager autoloading, these would be autoloaded
only when #preloader_for is called, which is too late
in threaded applications.
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deprecation message
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remove duplicated require statements in AR test cases
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Conflicts:
activerecord/lib/active_record/persistence.rb
railties/lib/rails/generators/rails/resource_route/resource_route_generator.rb
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code docs
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Fix has_many assocation w/select load after create
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If you create a new record via a collection association proxy that has
not loaded its target, and which selects additional attributes through
the association, then when the proxy loads its target, it will
inadvertently trigger an ActiveModel::MissingAttributeError during
attribute writing when CollectionAssociation#merge_target_lists attempts
to do its thing, since the newly loaded records will possess attributes
the created record does not.
This error also raises a bogus/confusing deprecation warning when
accessing the association in Rails 3.2.x, so cherry-pick would be
appreciated!
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This reverts commit abf8de85519141496a6773310964ec03f6106f3f.
We should take a deeper look to those cases flat_map doesn't do deep
flattening.
irb(main):002:0> [[[1,3], [1,2]]].map{|i| i}.flatten
=> [1, 3, 1, 2]
irb(main):003:0> [[[1,3], [1,2]]].flat_map{|i| i}
=> [[1, 3], [1, 2]]
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this method was not used, not documented and not tested.
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Rename `ActiveRecord::Fixtures` class to `ActiveRecord::FixtureSet`. Instances of this class normally hold a collection of fixtures (records) loaded either from a single YAML file, or from a file and a folder with the same name. This change make the class name singular and makes the class easier to distinguish from the modules like `ActiveRecord::TestFixtures`, which operates on multiple fixture sets, or `DelegatingFixtures`, `::Fixtures`, etc., and from the class `ActiveRecord::Fixture`, which corresponds to a single fixture.
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- Changed the comments documentation for the update_column(s) methods to add a little bit of clarity
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Patches `CollectionAssociation#count` to return 0 without querying
if the parent record is new. Consider the following code:
class Account
has_many :dossiers
end
class Dossier
belongs_to :account
end
a = Account.new
a.dossiers.build
# before patch
a.dossiers.count
# SELECT COUNT(*) FROM "dossiers" WHERE "dossiers"."account_id" IS NULL
# => 0
# after
a.dosiers.count # fires without sql query
# => 0
Fixes #1856.
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Fix reset_counters crashing on has_many :through associations.
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The counter column name in the intermediate model need to be access
via the through reflection.
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Optimize log subscribers to check if the log level is sufficient
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performing an operations.
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reflection init as 'if' stantment.
column is always the same expression and depends from the changing of attributes
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because Oracle adapter uses upper case attribute/column name.
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Conflicts:
actionpack/lib/action_view/helpers/asset_tag_helper.rb
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