method

extlib_inheritable_writer

rails latest stable - Class: Class

extlib_inheritable_writer(*ivars)

public

Defines class-level inheritable attribute writer. Attributes are available to subclasses, each subclass has a copy of parent’s attribute.

@param *syms Hash{:instance_writer => Boolean}]> Array of attributes to

define inheritable writer for.

@option syms :instance_writer<Boolean> if true, instance-level inheritable attribute writer is defined. @return <Array[#to_s]> An Array of the attributes that were made into inheritable writers.

@api public

@todo We need a style for class_eval <<-HEREDOC. I’d like to make it

class_eval(<<-RUBY, __FILE__, __LINE__), but we should codify it somewhere.

# File activesupport/lib/active_support/core_ext/class/inheritable_attributes.rb, line 222
  def extlib_inheritable_writer(*ivars)
    options = ivars.extract_options!

    ivars.each do |ivar|
      self.class_eval         def self.#{ivar}=(obj)          @#{ivar} = obj        end, __FILE__, __LINE__ + 1
      unless options[:instance_writer] == false
        self.class_eval           def #{ivar}=(obj) self.class.#{ivar} = obj end, __FILE__, __LINE__ + 1
      end

      self.send("#{ivar}=", yield) if block_given?
    end
  end

extlib_inheritable_writer

Method deprecated or moved

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