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Use frozen-string-literal in ActiveSupport
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if using prefix version.
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* Fix rdoc code formatting — `tt`, not backticks
* Fix/simplify sentence grammar — should at least just be “and the like”, not “likes”, but this is just general tightening up.
* Add note that delegated methods must be public. Tested here: https://github.com/rails/rails/blob/7ff5ccae94ce2aff76b5f8a31a28e305a047d642/activesupport/test/core_ext/module_test.rb#L359-L365
* Simplify example code for delegate_missing_to. The example had complexity that wasn’t necessary for demonstrating `delegate_missing_to`. This gets rid of a bunch of cruft so the example is more obvious about what’s going on regarding the feature itself.
[ci skip]
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So we shouldn't claim they're there, even when asked explicitly.
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When the delegation target is nil and the allow_nil option is not
in use, a Module::DelegationError is raised.
class C
delegate :a, to: :b
def b
nil
end
end
C.new.a
# => Module::DelegationError: C#a delegated to b.a, but b is nil
[ci skip]
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Clarify that mattr_* creates public methods
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This is a follow up to #25681, specifically this comment:
https://github.com/rails/rails/pull/25681#issuecomment-238294002
The way the thread local variable is stored is an implementation detail
and subject to change. It makes no sense to only generate a reader or
writer as you'd have to know where to read from or where it writes to.
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Style/SpaceBeforeBlockBraces
Style/SpaceInsideBlockBraces
Style/SpaceInsideHashLiteralBraces
Fix all violations in the repository.
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remove useless parameter
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This code has too much duplication and the rationale for the concatenation
may not be obvious to the reader. You define the ones at class-level, explain
why does the code concatenates there, and then the convenience ones at
instance-level just delegate.
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Fix `thread_mattr_accessor` share variable superclass with subclass
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The current implementation of `thread_mattr_accessor` set variable
sharing superclass with subclass. So the method doesn't work as documented.
Precondition
class Account
thread_mattr_accessor :user
end
class Customer < Account
end
Account.user = "DHH"
Account.user #=> "DHH"
Customer.user = "Rafael"
Customer.user # => "Rafael"
Documented behavior
Account.user # => "DHH"
Actual behavior
Account.user # => "Rafael"
Current implementation set variable statically likes `Thread[:attr_Account_user]`,
and customer also use it.
Make variable name dynamic to use own thread-local variable.
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The current code base is not uniform. After some discussion,
we have chosen to go with double quotes by default.
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Where appropriate prefer the more concise Regexp#match?, String#include?,
String#start_with?, and String#end_with?
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And make sure that it doesn't even try to call the method in the target.
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Introduce Module#delegate_missing_to
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When building decorators, a common pattern may emerge:
class Partition
def initialize(first_event)
@events = [ first_event ]
end
def people
if @events.first.detail.people.any?
@events.collect { |e| Array(e.detail.people) }.flatten.uniq
else
@events.collect(&:creator).uniq
end
end
private
def respond_to_missing?(name, include_private = false)
@events.respond_to?(name, include_private)
end
def method_missing(method, *args, &block)
@events.send(method, *args, &block)
end
end
With `Module#delegate_missing_to`, the above is condensed to:
class Partition
delegate_missing_to :@events
def initialize(first_event)
@events = [ first_event ]
end
def people
if @events.first.detail.people.any?
@events.collect { |e| Array(e.detail.people) }.flatten.uniq
else
@events.collect(&:creator).uniq
end
end
end
David suggested it in #23824.
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This commit updates `delegate` to use the keyword argument syntax added in Ruby 2. I left the `ArgumentError` when `to` is missing, because it better explains how to correctly use `delegate`. We could instead rely on the default `ArgumentError` that would be raised if `to` were a required keyword argument.
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mattr_writer to mattr_reader
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renamed cattr_reader to mattr_reader
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The current implentation of `thread_mattr_accessor` is setting
differently-named thread variables when defining class and
instance writer methods, so the method isn't working as documented:
Account.user = "DHH"
Account.user # => "DHH"
Account.new.user # => nil
a = Account.new
a.user = "ABC" # => "ABC"
a.class.user # => "DHH"
At this point `:attr_Account_user` and `:attr_Class_user` thread-local
variables have been created. Modify the reader and writer methods to use
the class name instead of 'Class'.
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After Ruby 1.9, we can easily get the constants that have been
defined locally by `Module.constants(false)`.
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[ci-skip]
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We went back to `Thread.current[]` in 33e11e59.
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accessors"
This reverts commit 301f43820562c6a70dffe30f4227ff0751f47d4f per @matthewd on https://github.com/rails/rails/pull/22630/files#r47997074
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We call the thread variable accessors on `Thread.current`, which matches Ruby's
documentation:
http://ruby-doc.org/core-2.2.0/Thread.html#method-i-thread_variable_get
Fix these to stay `current` ( ͡° ͜ʖ ͡°)
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[ci skip]
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[ci skip]
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