| Commit message (Collapse) | Author | Age | Files | Lines |
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In the end I think the pain of implementing this seamlessly was not
worth the gain provided.
The intention was that it would allow plain ruby objects that might not
live in your main application to be subclassed and have persistence
mixed in. But I've decided that the benefit of doing that is not worth
the amount of complexity that the implementation introduced.
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This reverts commit 83846838252397b3781eed165ca301e05db39293.
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I think it's going to be too much pain to try to transition the
:active_record load hook from executing against Base to executing
against Model.
For example, after Model is included in Base, and modules included in
Model will no longer get added to the ancestors of Base.
So plugins which wish to be compatible with both Model and Base should
use the :active_record_model load hook which executes *before* Base gets
loaded.
In general, ActiveRecord::Model is an advanced feature at the moment and
probably most people will continue to inherit from ActiveRecord::Base
for the time being.
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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
------
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
-----
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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This is purely a performance optimisation.
See https://gist.github.com/3552829
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This is a performance/GC optimisation.
In theory, this could be optimised by the implementation (last time I
checked, this would have no effect on JRuby). But in practise, this make
attribute access faster.
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Get rid of ActiveModel::Configuration, make better use of
ActiveSupport::Concern + class_attribute, etc.
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looked up on the instance
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another value has been specified).
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public"
This reverts commit be7d2248e9505983d1aacf0b33c657e6e3ddd9db.
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too.
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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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This reverts commit f6b5046305d43c5f64bcb6fed0e44f7bca99a603.
Fear not, the roflscale will return when I have a bit more time and
figure out a better way to do it. (In particular, a way that doesn't
break the build.)
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Don't prefix the name with attribute_. Avoids a string allocation on
read_attribute, which is a bit faster.
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This means we never have to rely on define_method (which is slower and
uses more memory), even when we have attributes containing characters
that are not allowed in standard method names.
(I am mainly changing this because the duplication annoys me, though.)
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Also make it actually work.
It slows down all read_attribute accesses to map 'id' to whatever the PK
actually is, inside read_attribute. So instead make sure the necessary
methods are defined and that they redirect wherever they need to go.
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This is good because it reduces duplication.
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This makes me happy!
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Define singleton methods on the attributes module instead. This reduces
method pollution on the actual model classes. It also seems to make
something faster, I am unsure why! O_o
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