method

thread_mattr_reader

v6.1.7.7 - Show latest stable - 0 notes - Class: Module

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What's this?

thread_mattr_reader(*syms, instance_reader: true, instance_accessor: true, default: nil) public

Defines a per-thread class attribute and creates class and instance reader methods. The underlying per-thread class variable is set to nil, if it is not previously defined.

module Current thread_mattr_reader :user end Current.user # => nil Thread.current[:attr_Current_user] = "DHH" Current.user # => "DHH"

The attribute name must be a valid method name in Ruby.

module Foo thread_mattr_reader :"1_Badname" end # => NameError: invalid attribute name: 1_Badname

To omit the instance reader method, pass instance_reader: false or instance_accessor: false.

class Current thread_mattr_reader :user, instance_reader: false end Current.new.user # => NoMethodError

Show source

# File activesupport/lib/active_support/core_ext/module/attribute_accessors_per_thread.rb, line 36 def thread_mattr_reader(*syms, instance_reader: true, instance_accessor: true, default: nil) # :nodoc: syms.each do |sym| raise NameError.new("invalid attribute name: #{sym}") unless /^[_A-Za-z]\w*$/.match?(sym) # The following generated method concatenates `name` because we want it # to work with inheritance via polymorphism. class_eval( def self.#{sym} Thread.current["attr_" + name + "_#{sym}"] end, __FILE__, __LINE__ + 1) if instance_reader && instance_accessor class_eval( def #{sym} self.class.#{sym} end, __FILE__, __LINE__ + 1) end Thread.current["attr_" + name + "_#{sym}"] = default unless default.nil? end end

thread_mattr_reader

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