Thanks to ko1, passing block parameter to another method is
significantly optimized in Ruby 2.5.
https://bugs.ruby-lang.org/issues/14045
Thus we no longer need to keep this ugly hack.
Generally followed the pattern for https://github.com/rails/rails/pull/32034
* Removes needless CI configs for 2.4
* Targets 2.5 in rubocop
* Updates existing CHANGELOG entries for fewer merge conflicts
* Removes Hash#slice extension as that's inlined on Ruby 2.5.
* Removes the need for send on define_method in MethodCallAssertions.
If a klass has acceptance validation and then
`klass.undefine_attribute_methods` is happened before an attribute
method is called, infinit loop is caused on the `method_missing` defined
by the `LazilyDefineAttributes`.
https://travis-ci.org/rails/rails/jobs/467053984#L1409
To prevent the infinit loop, the `method_missing` should ensure
`klass.define_attribute_methods`.
Related 34cc301f03aea2e579d6687a9ea9782afc1089a0.
`QueryAttribute#value_for_database` calls only `type.serialize`, and
`Decimal#serialize` is a no-op unlike other attribute types.
Whether or not `serialize` will invoke `cast` is undefined in our test
cases, but it actually does not work properly unless it does so for now.
Previosly, `update_columns` would just take whatever keys you gave it
and tried to run the update query. Most likely this would result in an
error from the database. However, if the column actually did exist, but
was in `ignored_columns`, this would result in the method returning
successfully when it should have raised, and an attribute that should
not exist written to `@attributes`.
Ruby uses the original method name, so will show the __temp__ method
name in the backtrace. However, in the common case the method name
is compatible with the `def` keyword, so we can avoid the __temp__
method name in that case to improve the name shown in backtraces
or TracePoint#method_id.
Since Rails 6.0 will support Ruby 2.4.1 or higher
`# frozen_string_literal: true` magic comment is enough to make string object frozen.
This magic comment is enabled by `Style/FrozenStringLiteralComment` cop.
* Exclude these files not to auto correct false positive `Regexp#freeze`
- 'actionpack/lib/action_dispatch/journey/router/utils.rb'
- 'activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb'
It has been fixed by https://github.com/rubocop-hq/rubocop/pull/6333
Once the newer version of RuboCop released and available at Code Climate these exclude entries should be removed.
* Replace `String#freeze` with `String#-@` manually if explicit frozen string objects are required
- 'actionpack/test/controller/test_case_test.rb'
- 'activemodel/test/cases/type/string_test.rb'
- 'activesupport/lib/active_support/core_ext/string/strip.rb'
- 'activesupport/test/core_ext/string_ext_test.rb'
- 'railties/test/generators/actions_test.rb'
For example, dirty checking was not right for the following case:
```
model.int_column = "+5"
model.float_column = "0.5E+1"
model.decimal_column = "0.5e-3"
```
It is enough to see whether leading character is a digit for avoiding
invalid numeric expression like 'wibble' to be type-casted to 0, as
this method's comment says.
Fixes#33801
The multiplication of the value takes a long time when we can instead mutate and use the string value directly.
The `microsec` perf increases speed by 27% in the ideal case (which is the most common).
```
original_string = ".443959"
require 'benchmark/ips'
Benchmark.ips do |x|
x.report("multiply") {
string = original_string.dup
(string.to_r * 1_000_000).to_i
}
x.report("new ") {
string = original_string.dup
if string && string.start_with?(".".freeze) && string.length == 7
string[0] = ''.freeze
string.to_i
end
}
x.compare!
end
# Warming up --------------------------------------
# multiply 125.783k i/100ms
# new 146.543k i/100ms
# Calculating -------------------------------------
# multiply 1.751M (± 3.3%) i/s - 8.805M in 5.033779s
# new 2.225M (± 2.1%) i/s - 11.137M in 5.007110s
# Comparison:
# new : 2225289.7 i/s
# multiply: 1751254.2 i/s - 1.27x slower
```
The purpose of fe9547b is to work type casting to value from database.
But that was caused not to use the value before type cast even except
Active Record.
There we never guarantees that the value before type cast was going to
the used in this validation, but we should not change the behavior
unless there is some particular reason.
To restore original behavior, still use the value before type cast if
`came_from_user?` is undefined (i.e. except Active Record).
Fixes#33651.
Fixes#33686.
Since fe9547b6, numericality validator would parse raw value only when a
value came from user to work type casting to a value from database.
But that was caused a regression that the validator would work against
getter value instead of parsed raw value, a getter is sometimes
customized by people. #33550
There we never guarantees that the value before type cast was going to
the used in this validation (actually here is only place that getter
value might not be used), but we should not change the behavior unless
there is some particular reason.
The purpose of fe9547b6 is to work type casting to a value from
database. We could achieve the purpose by using `read_attribute`,
without using getter value.
Fixes#33550.
Use attr_reader/attr_writer instead of methods
method is 12% slower
Use flat_map over map.flatten(1)
flatten is 66% slower
Use hash[]= instead of hash.merge! with single arguments
merge! is 166% slower
See https://github.com/rails/rails/pull/32337 for more conversation
This ends up adding it to all save-related callbacks defined in `ActiveRecord::DefineCallbacks`, including e.g. `after_create`. Which should be fine: they didn't support `:on` in the first place.
