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To be able to return type of validator, one can now call `details`
on Errors instance:
```ruby
class User < ActiveRecord::Base
validates :name, presence: true
end
```
```ruby
user = User.new; user.valid?; user.errors.details
=> {name: [{error: :blank}]}
```
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When an attribute is assigned, we determine if it was already marked as
changed so we can determine if we need to clear the changes, or mark it
as changed. Since this only affects the `attributes_changed_by_setter`
hash, in-place changes are irrelevant to this process. Since calculating
in-place changes can be expensive, we can just skip it here.
I also added a test for the only edge case I could think of that would
be affected by this change.
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allow '1' or true for acceptance validation.
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MassAssignmentSecurity was removed from ActiveModel f8c9a4d3e88181
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'_singularize' only ever gets called with one argument
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These requires were added only to change deprecation message
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`ActiveModel::Dirty#reset_changes`.
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Introduce explicit way of halting callback chains by throwing :abort. Deprecate current implicit behavior of halting callback chains by returning `false` in apps ported to Rails 5.0. Completely remove that behavior in brand new Rails 5.0 apps.
Conflicts:
railties/CHANGELOG.md
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Before this commit, returning `false` in an ActiveModel `before_` callback
such as `before_create` would halt the callback chain.
After this commit, the behavior is deprecated: will still work until
the next release of Rails but will also display a deprecation warning.
The preferred way to halt a callback chain is to explicitly `throw(:abort)`.
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Before this commit, returning `false` in an ActiveModel validation
callback such as `before_validation` would halt the callback chain.
After this commit, the behavior is deprecated: will still work until
the next release of Rails but will also display a deprecation warning.
The preferred way to halt a callback chain is to explicitly `throw(:abort)`.
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This commit changes arguments and default value of CallbackChain's :terminator
option.
After this commit, Chains of callbacks defined **without** an explicit
`:terminator` option will be halted as soon as a `before_` callback throws
`:abort`.
Chains of callbacks defined **with** a `:terminator` option will maintain their
existing behavior of halting as soon as a `before_` callback matches the
terminator's expectation. For instance, ActiveModel's callbacks will still
halt the chain when a `before_` callback returns `false`.
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Also prevents the word "Model" from linking to the documentation
of ActiveModel::Model because that's not intended.
[ci skip]
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Calling `changed_attributes` will ultimately check if every mutable
attribute has changed in place. Since this gets called whenever an
attribute is assigned, it's extremely slow. Instead, we can avoid this
calculation until we actually need it.
Fixes #18029
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The default value for the argument `message` in
`ActiveModel::Errors#add` has a new behavior
since ca99ab2481d44d67bc392d0ec1125ff1439e9f94.
Before
person.errors.add(:name, nil)
# => ["is invalid"]
After
person.errors.add(:name, nil)
# => [nil]
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I'm not sure what's the use case for this, but apparently it broke some apps.
Since it was not the intended result from #16210 I fixed it to not raise an
exception anymore. However, I didn't add documentation for it because I don't
know if this should be officially supported without knowing how it's meant to
be used.
In general, validations should be side-effect-free (other than adding to the
error message to `@errors`). Order-dependent validations seems like a bad idea.
Fixes #18002
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since 'attr_name_will_change!' is not an actual method it should
be clearer that you have to insert the attribute name as in line 104
[ci skip]
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Active Record defines `attribute_method_suffix :?`. That suffix will
match any predicate method when the lookup occurs in Active Model. This
will make it incorrectly decide that `id_changed?` should not exist,
because it attempts to determine if the attribute `id_changed` is
present, rather than `id` with the `_changed?` suffix. Instead, we will
look for any correct match.
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The detection of in-place changes caused a weird unexpected issue with
numericality validations. That validator (out of necessity) works on the
`_before_type_cast` version of the attribute, since on an `:integer`
type column, a non-numeric string would type cast to 0.
However, strings are mutable, and we changed strings to ensure that the
post type cast version of the attribute was a different instance than
the before type cast version (so the mutation detection can work
properly).
Even though strings are the only mutable type for which a numericality
validation makes sense, special casing strings would feel like a strange
change to make here. Instead, we can make the assumption that for all
mutable types, we should work on the post-type-cast version of the
attribute, since all cases which would return 0 for non-numeric strings
are immutable.
Fixes #17852
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We will support only Ruby >= 2.1.
But right now we don't accept pull requests with syntax changes to drop
support to Ruby 1.9.
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Commit d67b289 introduced a tiny regression in the docs for #from_json,
true needs to be included when the root node is present.
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ActiveModel::Dirty#clear_attribute_changes method
In Rails 4.2 it is impossible to define a custom default value for a model's
attribute without making it appear as _changed?, especially when the model
is first initialized. Making this method publicly visible will allow such a behaviour,
without the need to use private APIs.
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This patch uniformizes warning messages. I used the most common style
already present in the code base:
* Capitalize the first word.
* End the message with a full stop.
* "Rails 5" instead of "Rails 5.0".
* Backticks for method names and inline code.
Also, converted a few long strings into the new heredoc convention.
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This will avoid naming clash with user defined methods
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Mirror Ruby's Hash#key?
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justinweiss/update_validation_context_documentation
Docs: Add a note on custom validation contexts. [ci skip]
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The documentation on `:on` for validations was inconsistent, and most
only referenced the `:create` and `:update` contexts. I fixed those to
be consistent with the documentation on `AM::Validations.validates`,
which seemed to have the best docs.
[ci skip]
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\Z allows appended newlines where \z does not.
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Inspired by @tenderlove's work in
c363fff29f060e6a2effe1e4bb2c4dd4cd805d6e, this reduces the number of
strings allocated when running callbacks for ActiveRecord instances. I
measured that using this script:
```
require 'objspace'
require 'active_record'
require 'allocation_tracer'
ActiveRecord::Base.establish_connection adapter: "sqlite3",
database: ":memory:"
ActiveRecord::Base.connection.instance_eval do
create_table(:articles) { |t| t.string :name }
end
class Article < ActiveRecord::Base; end
a = Article.create name: "foo"
a = Article.find a.id
N = 10
result = ObjectSpace::AllocationTracer.trace do
N.times { Article.find a.id }
end
result.sort.each do |k,v|
p k => v
end
puts "total: #{result.values.map(&:first).inject(:+)}"
```
When I run this against master and this branch I get this output:
```
pete@balloon:~/projects/rails/activerecord$ git checkout master
M Gemfile
Switched to branch 'master'
pete@balloon:~/projects/rails/activerecord$ bundle exec ruby benchmark_allocation_with_callback_send.rb > allocations_before
pete@balloon:~/projects/rails/activerecord$ git checkout remove-dynamic-send-on-built-in-callbacks
M Gemfile
Switched to branch 'remove-dynamic-send-on-built-in-callbacks'
pete@balloon:~/projects/rails/activerecord$ bundle exec ruby benchmark_allocation_with_callback_send.rb > allocations_after
pete@balloon:~/projects/rails/activerecord$ diff allocations_before allocations_after
39d38
<
{["/home/pete/projects/rails/activesupport/lib/active_support/callbacks.rb",
81]=>[40, 0, 0, 0, 0, 0]}
42c41
< total: 630
---
> total: 590
```
In addition to this, there are two micro-optimizations present:
* Using `block.call if block` vs `yield if block_given?` when the block was being captured already.
```
pete@balloon:~/projects$ cat benchmark_block_call_vs_yield.rb
require 'benchmark/ips'
def block_capture_with_yield &block
yield if block_given?
end
def block_capture_with_call &block
block.call if block
end
def no_block_capture
yield if block_given?
end
Benchmark.ips do |b|
b.report("block_capture_with_yield") { block_capture_with_yield }
b.report("block_capture_with_call") { block_capture_with_call }
b.report("no_block_capture") { no_block_capture }
end
pete@balloon:~/projects$ ruby benchmark_block_call_vs_yield.rb
Calculating -------------------------------------
block_capture_with_yield
124979 i/100ms
block_capture_with_call
138340 i/100ms
no_block_capture 136827 i/100ms
-------------------------------------------------
block_capture_with_yield
5703108.9 (±2.4%) i/s - 28495212 in 4.999368s
block_capture_with_call
6840730.5 (±3.6%) i/s - 34169980 in 5.002649s
no_block_capture 5821141.4 (±2.8%) i/s - 29144151 in 5.010580s
```
* Defining and calling methods instead of using send.
```
pete@balloon:~/projects$ cat benchmark_method_call_vs_send.rb
require 'benchmark/ips'
class Foo
def tacos
nil
end
end
my_foo = Foo.new
Benchmark.ips do |b|
b.report('send') { my_foo.send('tacos') }
b.report('call') { my_foo.tacos }
end
pete@balloon:~/projects$ ruby benchmark_method_call_vs_send.rb
Calculating -------------------------------------
send 97736 i/100ms
call 151142 i/100ms
-------------------------------------------------
send 2683730.3 (±2.8%) i/s - 13487568 in 5.029763s
call 8005963.9 (±2.7%) i/s - 40052630 in 5.006604s
```
The result of this is making typical ActiveRecord operations slightly faster:
https://gist.github.com/phiggins/e46e51dcc7edb45b5f98
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- Improve the error message by suggesting that the user may have
intended to call validates instead of validate method.
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When we are loading a component and we want to know its version, we are
actually not speaking about the constant but the library itself.
[ci skip]
[Godfrey Chan & Xavier Noria]
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Update documentation to match change in #5942 [ci skip]
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This way no new object allocation is taking place. Thanks @jeremy for
the suggestion!
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The functionality has not changed, but the code is more elegant by
using `reduce` instead of `each`.
This way no accumulator needs to be declared, no explicit return is
needed.
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