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Fix `assert_in_delta` test failure
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`assert_in_delta` in `timestamp_test.rb` causes an intermittent test
failure. It looks like that caused by subseconds truncation in MySQL 5.5.
Example:
```
1) Failure:
TimestampTest#test_touching_many_attributes_updates_them [/home/travis/build/rails/rails/activerecord/test/cases/timestamp_test.rb:125]:
Expected |2016-02-06 09:22:10 +0000 - 2016-02-06 09:22:09 UTC| (1.000837185) to be <= 1.
```
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Fix NoMethodError preparable for Arel::Visitors::PostgreSQL
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is falsy
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Add test cases about MySQL ORDER BY FIELD()
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Add assertions to MySQL `ORDER BY FIELD()` with empty data.
These tests examine to sanitize `ORDER BY FIELD()` with empty data
appropriately.
```ruby
Tag.order(['field(id, ?)', []]).to_sql
# => SELECT "tags".* FROM "tags" ORDER BY field(id, NULL)
Tag.order(['field(id, ?)', nil]).to_sql
# => SELECT "tags".* FROM "tags" ORDER BY field(id, NULL)
```
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Fix typographical error
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Remove `alias exec_without_stmt exec_query`
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This alias was for compatibility with legacy mysql adapter.
But the return value of both methods is already inconsistent.
`exec_query` returns `ActiveRecord::Result` instance.
But `exec_without_stmt` returns `[result_set, affected_rows]`
https://github.com/rails/rails/blob/v4.2.5.1/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb#L335-L364
Legacy mysql adapter was already removed in Rails 5.0.
I think we can remove this inconsistent alias.
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Improve the performance of string xor operation
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Use `each_byte` instead of `bytes` to speed up string xor operation and
reduce object allocations.
Inspired by commit 02c3867882d6d23b10df262a6db5f937ca69fb53.
``` ruby
require 'benchmark/ips'
require 'allocation_tracer'
a = 32.times.map { rand(256) }.pack('C*')
b = 32.times.map { rand(256) }.pack('C*')
def xor_byte_strings1(s1, s2)
s1.bytes.zip(s2.bytes).map { |(c1,c2)| c1 ^ c2 }.pack('c*')
end
def xor_byte_strings2(s1, s2)
s2_bytes = s2.bytes
s1.bytes.map.with_index { |c1, i| c1 ^ s2_bytes[i] }.pack('c*')
end
def xor_byte_strings3(s1, s2)
s2_bytes = s2.bytes
s1.each_byte.with_index { |c1, i| s2_bytes[i] ^= c1 }
s2_bytes.pack('C*')
end
fail if xor_byte_strings1(a, b) != xor_byte_strings2(a, b)
fail if xor_byte_strings1(a, b) != xor_byte_strings3(a, b)
Benchmark.ips do |x|
x.report('xor_byte_strings1') { xor_byte_strings1(a, b) }
x.report('xor_byte_strings2') { xor_byte_strings2(a, b) }
x.report('xor_byte_strings3') { xor_byte_strings3(a, b) }
x.compare!
end
Tracer = ObjectSpace::AllocationTracer
Tracer.setup(%i{type})
p xor_byte_strings1: Tracer.trace { xor_byte_strings1(a, b) }
p xor_byte_strings2: Tracer.trace { xor_byte_strings2(a, b) }
p xor_byte_strings3: Tracer.trace { xor_byte_strings3(a, b) }
```
```
Warming up --------------------------------------
xor_byte_strings1 10.668k i/100ms
xor_byte_strings2 11.814k i/100ms
xor_byte_strings3 13.139k i/100ms
Calculating -------------------------------------
xor_byte_strings1 116.667k (± 3.1%) i/s - 586.740k
xor_byte_strings2 129.932k (± 4.3%) i/s - 649.770k
xor_byte_strings3 142.506k (± 4.2%) i/s - 722.645k
Comparison:
xor_byte_strings3: 142506.3 i/s
xor_byte_strings2: 129932.4 i/s - 1.10x slower
xor_byte_strings1: 116666.8 i/s - 1.22x slower
{:xor_byte_strings1=>{[:T_ARRAY]=>[38, 0, 0, 0, 0, 0], [:T_STRING]=>[2, 0, 0, 0, 0, 0]}}
{:xor_byte_strings2=>{[:T_ARRAY]=>[3, 0, 0, 0, 0, 0], [:T_DATA]=>[1, 0, 0, 0, 0, 0], [:T_IMEMO]=>[2, 0, 0, 0, 0, 0], [:T_STRING]=>[2, 0, 0, 0, 0, 0]}}
{:xor_byte_strings3=>{[:T_ARRAY]=>[1, 0, 0, 0, 0, 0], [:T_DATA]=>[1, 0, 0, 0, 0, 0], [:T_IMEMO]=>[2, 0, 0, 0, 0, 0], [:T_STRING]=>[2, 0, 0, 0, 0, 0]}}
```
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Adding test to verify the last week when the year is leap
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Fixing failing specification for verifying the last week when the year is leap
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Reduce `attribute.to_s`
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Remove unused parameter from method
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The `attribute` parameter is not used inside the `normalize_detail`
method. This does not need to go through a deprecation cycle, since the
method is private.
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Match test name to test (typo)
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Add a note about downcasing submit tag
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This is a notable change since this will cause confusing test failures for tests relying on the old naming scheme.
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Show correct return types for examples
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Why are we here? Where did we come from? Where are we going... in 5 minutes?
These questions are not answered in this documentation. Instead collection
caching is better clarified. How it works, how it can share caches with
individual templates.
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Yo dawg, we so explicit if we were a music track, yo' iPhone's Music app would put
an E next to it.
*drops mic*
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Get it? ( ͡° ͜ʖ ͡°)
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use method provided by minitest
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The process of converting `Test` to `String` is already defined in minitest.
I think it is better to use that for the consistency of output content.
ref: https://github.com/seattlerb/minitest/blob/master/lib/minitest/test.rb#L261..L267
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Fixed typo
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Improve CHANGELOG for https://github.com/rails/rails/pull/17043 [ci skip]
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Mutating the result of Relation#to_a should not affect the relation
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Clarifying this separation and enforcing relation immutability is the
culmination of the previous efforts to remove the mutator method
delegations.
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Make collection caching explicit.
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Augments the collection caching with some instrumentation that's logged.
For collections that have been cached like:
```ruby
<%= render partial: 'notifications/notification', collection: @notifications, cached: true %>
```
We'll output a line showing how many cache hits we had when rendering it:
```
Rendered collection of notifications/_notification.html.erb [0 / 100 cache hits] (3396.5ms)
```
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Reevaluating the log output generated from this instrumentation,
we've found that it wasn't all that useful in practice.
```
Caches multi read:
- views/david/2/4184ab71db6849621a4d8820fcd2c0ad
- views/david/2/4184ab71db6849621a4d8820fcd2c0ad
- views/david/3/4184ab71db6849621a4d8820fcd2c0ad
- views/david/3/4184ab71db6849621a4d8820fcd2c0ad
```
If rendering many templates the output is inscrutable, and it's impossible
to see how many cache misses there were.
Revert ca6aba7f30 and implement a better way later.
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Having collection caching that wraps templates and automatically tries
to infer if they are cachable proved to be too much of a hassle.
We'd rather have it be something you explicitly turn on.
This removes much of the code and docs to explain the previous automatic
behavior.
This change also removes scoped cache keys and passing cache_options.
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fix typo
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Fixes #23645
When you're using an `attr_accessor` for a record instead of an
attribute in the database there's no way for the record to know if it
has `changed?` unless you tell it `attribute_will_change!("attribute")`.
The change made in 27aa4dd updated validations to check if a record was
`changed?` or `marked_for_destruction?` or not `persisted?`. It did not
take into account virtual attributes that do not affect the model's
dirty status.
The only way to fix this is to always validate the record if the
attribute does not belong to the set of attributes the record expects
(in `record.attributes`) because virtual attributes will not be in that
hash.
I think we should consider deprecating this particular behavior in the
future and requiring that the user mark the record dirty by noting that
the virtual attribute will change. Unfortunately this isn't easy because
we have no way of knowing that you did the "right thing" in your
application by marking it dirty and will get the deprecation warning
even if you are doing the correct thing.
For now this restores expected behavior when using a virtual attribute
by always validating the record, as well as adds tests for this case.
I was going to add the `!record.attributes.include?(attribute)` to the
`should_validate?` method but `uniqueness` cannot validate a virtual
attribute with nothing to hold on to the attribute. Because of this
`should_validate?` was about to become a very messy method so I decided
to split them up so we can handle it specifically for each case.
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Fixed a typo
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habtm join tables commonly have two id columns and it's OK to make those
two id columns a primary key. This commit eliminates the warnings for
join tables that have this setup.
ManageIQ/manageiq#6713
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Deprecate AC::Parameters#== with Hash
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Creating a protected getter method for `@parameters`.
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