diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/module/attribute_accessors.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/module/attribute_accessors.rb | 61 |
1 files changed, 32 insertions, 29 deletions
diff --git a/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb b/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb index 567ac825e9..580baffa2b 100644 --- a/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb +++ b/activesupport/lib/active_support/core_ext/module/attribute_accessors.rb @@ -1,4 +1,7 @@ -require 'active_support/core_ext/array/extract_options' +# frozen_string_literal: true + +require "active_support/core_ext/array/extract_options" +require "active_support/core_ext/regexp" # Extends the module object with class/module and instance accessors for # class/module attributes, just like the native attr* accessors for instance @@ -6,7 +9,8 @@ require 'active_support/core_ext/array/extract_options' class Module # Defines a class attribute and creates a class and instance reader methods. # The underlying class variable is set to +nil+, if it is not previously - # defined. + # defined. All class and instance methods created will be public, even if + # this method is called with a private or protected access modifier. # # module HairColors # mattr_reader :hair_colors @@ -36,13 +40,10 @@ class Module # # Person.new.hair_colors # => NoMethodError # - # - # Also, you can pass a block to set up the attribute with a default value. + # You can set a default value for the attribute. # # module HairColors - # mattr_reader :hair_colors do - # [:brown, :black, :blonde, :red] - # end + # mattr_reader :hair_colors, default: [:brown, :black, :blonde, :red] # end # # class Person @@ -50,10 +51,9 @@ class Module # end # # Person.new.hair_colors # => [:brown, :black, :blonde, :red] - def mattr_reader(*syms) - options = syms.extract_options! + def mattr_reader(*syms, instance_reader: true, instance_accessor: true, default: nil) syms.each do |sym| - raise NameError.new("invalid attribute name: #{sym}") unless sym =~ /\A[_A-Za-z]\w*\z/ + raise NameError.new("invalid attribute name: #{sym}") unless /\A[_A-Za-z]\w*\z/.match?(sym) class_eval(<<-EOS, __FILE__, __LINE__ + 1) @@#{sym} = nil unless defined? @@#{sym} @@ -62,20 +62,24 @@ class Module end EOS - unless options[:instance_reader] == false || options[:instance_accessor] == false + if instance_reader && instance_accessor class_eval(<<-EOS, __FILE__, __LINE__ + 1) def #{sym} @@#{sym} end EOS end - class_variable_set("@@#{sym}", yield) if block_given? + + sym_default_value = (block_given? && default.nil?) ? yield : default + class_variable_set("@@#{sym}", sym_default_value) unless sym_default_value.nil? end end alias :cattr_reader :mattr_reader # Defines a class attribute and creates a class and instance writer methods to - # allow assignment to the attribute. + # allow assignment to the attribute. All class and instance methods created + # will be public, even if this method is called with a private or protected + # access modifier. # # module HairColors # mattr_writer :hair_colors @@ -103,12 +107,10 @@ class Module # # Person.new.hair_colors = [:blonde, :red] # => NoMethodError # - # Also, you can pass a block to set up the attribute with a default value. + # You can set a default value for the attribute. # # module HairColors - # mattr_writer :hair_colors do - # [:brown, :black, :blonde, :red] - # end + # mattr_writer :hair_colors, default: [:brown, :black, :blonde, :red] # end # # class Person @@ -116,10 +118,9 @@ class Module # end # # Person.class_variable_get("@@hair_colors") # => [:brown, :black, :blonde, :red] - def mattr_writer(*syms) - options = syms.extract_options! + def mattr_writer(*syms, instance_writer: true, instance_accessor: true, default: nil) syms.each do |sym| - raise NameError.new("invalid attribute name: #{sym}") unless sym =~ /\A[_A-Za-z]\w*\z/ + raise NameError.new("invalid attribute name: #{sym}") unless /\A[_A-Za-z]\w*\z/.match?(sym) class_eval(<<-EOS, __FILE__, __LINE__ + 1) @@#{sym} = nil unless defined? @@#{sym} @@ -128,19 +129,23 @@ class Module end EOS - unless options[:instance_writer] == false || options[:instance_accessor] == false + if instance_writer && instance_accessor class_eval(<<-EOS, __FILE__, __LINE__ + 1) def #{sym}=(obj) @@#{sym} = obj end EOS end - send("#{sym}=", yield) if block_given? + + sym_default_value = (block_given? && default.nil?) ? yield : default + send("#{sym}=", sym_default_value) unless sym_default_value.nil? end end alias :cattr_writer :mattr_writer # Defines both class and instance accessors for class attributes. + # All class and instance methods created will be public, even if + # this method is called with a private or protected access modifier. # # module HairColors # mattr_accessor :hair_colors @@ -191,12 +196,10 @@ class Module # Person.new.hair_colors = [:brown] # => NoMethodError # Person.new.hair_colors # => NoMethodError # - # Also you can pass a block to set up the attribute with a default value. + # You can set a default value for the attribute. # # module HairColors - # mattr_accessor :hair_colors do - # [:brown, :black, :blonde, :red] - # end + # mattr_accessor :hair_colors, default: [:brown, :black, :blonde, :red] # end # # class Person @@ -204,9 +207,9 @@ class Module # end # # Person.class_variable_get("@@hair_colors") # => [:brown, :black, :blonde, :red] - def mattr_accessor(*syms, &blk) - mattr_reader(*syms, &blk) - mattr_writer(*syms) + def mattr_accessor(*syms, instance_reader: true, instance_writer: true, instance_accessor: true, default: nil, &blk) + mattr_reader(*syms, instance_reader: instance_reader, instance_accessor: instance_accessor, default: default, &blk) + mattr_writer(*syms, instance_writer: instance_writer, instance_accessor: instance_accessor, default: default) end alias :cattr_accessor :mattr_accessor end |