| Commit message (Collapse) | Author | Age | Files | Lines |
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PERF: Scope performance.
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Benchmark Script:
```
begin
require 'bundler/inline'
rescue LoadError => e
$stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
raise e
end
gemfile(true) do
source 'https://rubygems.org'
# gem 'rails', github: 'rails/rails', ref: 'f1f0a3f8d99aef8aacfa81ceac3880dcac03ca06'
gem 'rails', path: '~/rails'
gem 'arel', github: 'rails/arel', branch: 'master'
gem 'rack', github: 'rack/rack', branch: 'master'
gem 'sass'
gem 'sprockets-rails', github: 'rails/sprockets-rails', branch: 'master'
gem 'sprockets', github: 'rails/sprockets', branch: 'master'
gem 'pg'
gem 'benchmark-ips'
end
require 'active_record'
require 'benchmark/ips'
ActiveRecord::Base.establish_connection('postgres://postgres@localhost:5432/rubybench')
ActiveRecord::Migration.verbose = false
ActiveRecord::Schema.define do
create_table :users, force: true do |t|
t.string :name, :email
t.timestamps null: false
end
end
class User < ActiveRecord::Base; end
attributes = {
name: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
email: "foobar@email.com",
}
1000.times { User.create!(attributes) }
Benchmark.ips(5, 3) do |x|
x.report('where with hash') { User.where(name: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.") }
x.report('where with string') { User.where("users.name = ?", "Lorem ipsum dolor sit amet, consectetur adipiscing elit.") }
x.compare!
end
key =
if RUBY_VERSION < '2.2'
:total_allocated_object
else
:total_allocated_objects
end
before = GC.stat[key]
User.where(name: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.")
after = GC.stat[key]
puts "Total Allocated Object: #{after - before}"
```
Stackprof output truncated.
```
TOTAL (pct) SAMPLES (pct) FRAME
52 (10.6%) 10 (2.0%) ActiveRecord::Scoping::Default::ClassMethods#build_default_scope
```
Before:
```
Calculating -------------------------------------
where with hash 2.789k i/100ms
where with string 4.407k i/100ms
-------------------------------------------------
where with hash 29.170k (± 1.9%) i/s - 147.817k
where with string 46.954k (± 2.7%) i/s - 237.978k
Comparison:
where with string: 46954.3 i/s
where with hash: 29169.9 i/s - 1.61x slower
Total Allocated Object: 85
Calculating -------------------------------------
all 16.773k i/100ms
-------------------------------------------------
all 186.102k (± 3.6%) i/s - 939.288k
```
After:
```
Calculating -------------------------------------
where with hash 3.014k i/100ms
where with string 4.623k i/100ms
-------------------------------------------------
where with hash 31.524k (± 1.3%) i/s - 159.742k
where with string 49.948k (± 2.3%) i/s - 249.642k
Comparison:
where with string: 49948.3 i/s
where with hash: 31524.3 i/s - 1.58x slower
Total Allocated Object: 84
Calculating -------------------------------------
all 20.139k i/100ms
-------------------------------------------------
all 227.860k (± 2.5%) i/s - 1.148M
```
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Benchmark script used:
```
begin
require 'bundler/inline'
rescue LoadError => e
$stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
raise e
end
gemfile(true) do
source 'https://rubygems.org'
gem 'rails', path: '~/rails' # master against ref "f1f0a3f8d99aef8aacfa81ceac3880dcac03ca06"
gem 'arel', github: 'rails/arel', branch: 'master'
gem 'rack', github: 'rack/rack', branch: 'master'
gem 'sass'
gem 'sprockets-rails', github: 'rails/sprockets-rails', branch: 'master'
gem 'sprockets', github: 'rails/sprockets', branch: 'master'
gem 'pg'
gem 'benchmark-ips'
end
require 'active_record'
require 'benchmark/ips'
ActiveRecord::Base.establish_connection('postgres://postgres@localhost:5432/rubybench')
ActiveRecord::Migration.verbose = false
ActiveRecord::Schema.define do
create_table :users, force: true do |t|
t.string :name, :email
t.timestamps null: false
end
end
class User < ActiveRecord::Base; end
attributes = {
name: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
email: "foobar@email.com",
}
1000.times { User.create!(attributes) }
Benchmark.ips(5, 3) do |x|
x.report('all') { User.all }
end
key =
if RUBY_VERSION < '2.2'
:total_allocated_object
else
:total_allocated_objects
end
before = GC.stat[key]
User.where(name: "Lorem ipsum dolor sit amet, consectetur adipiscing elit.")
after = GC.stat[key]
puts "Total Allocated Object: #{after - before}"
```
Before:
```
Calculating -------------------------------------
all 17.569k i/100ms
-------------------------------------------------
all 190.854k (± 3.3%) i/s - 966.295k
Total Allocated Object: 85
```
After:
```
Calculating -------------------------------------
all 22.237k i/100ms
-------------------------------------------------
all 262.715k (± 5.5%) i/s - 1.312M
Total Allocated Object: 80
```
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class
Fixes #19528
fix for mysql2 test
better test
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- Eager loading was not working for the default_scope (class method)
for 'find' & 'find_by' methods.
- Fixed these by adding a new check 'respond_to?(:default_scope)'.
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Instead use .scope_attributes? consistently in ActiveRecord to check whether
there are attributes currently associated with the scope.
Move the implementation of .scope_attributes? and .scope_attributes to
ActiveRecord::Scoping because they don't particularly have to do specifically
with Named scopes and their only dependency, in the case of
.scope_attributes?, and only caller, in the case of .scope_attributes is
contained in Scoping.
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Pass a base relation to build_default_scope when joining
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This allows the default scope to be built using the current table alias.
Resolves #12770
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Thank you @bquorning
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[ci-skip]
Closes rails/rails#14294
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We are checking this when defining the default scope and raising an
ArgumentError
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Calling default_scope without a proc will now raise `ArgumentError`.
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current ScopeRegister object.
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current_scope and ignore_default_scope locals are brought together under
a registry object.
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See #10107.
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Update comment to reflect that unscoped works with named scope
even when named scope is using without block form
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It's sometimes hard to quickly find where deprecated call was performed, especially in case of migrating between Rails versions. So this is an attempt to improve the call stack part of the warning message by providing caller explicitly.
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Get rid of ActiveModel::Configuration, make better use of
ActiveSupport::Concern + class_attribute, etc.
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reason)
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Don't use this:
scope :red, where(color: 'red')
default_scope where(color: 'red')
Use this:
scope :red, -> { where(color: 'red') }
default_scope { where(color: 'red') }
The former has numerous issues. It is a common newbie gotcha to do
the following:
scope :recent, where(published_at: Time.now - 2.weeks)
Or a more subtle variant:
scope :recent, -> { where(published_at: Time.now - 2.weeks) }
scope :recent_red, recent.where(color: 'red')
Eager scopes are also very complex to implement within Active
Record, and there are still bugs. For example, the following does
not do what you expect:
scope :remove_conditions, except(:where)
where(...).remove_conditions # => still has conditions
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The problem: We need to be able to specify configuration in a way that
can be inherited to models that include ActiveRecord::Model. So it is
no longer sufficient to put 'top level' config on ActiveRecord::Base,
but we do want configuration specified on ActiveRecord::Base and
descendants to continue to work.
So we need something like class_attribute that can be defined on a
module but that is inherited when ActiveRecord::Model is included.
The solution: added ActiveModel::Configuration module which provides a
config_attribute macro. It's a bit specific hence I am not putting this
in Active Support or making it a 'public API' at present.
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