1

我想使用 Ruby 模块来存储一组配置默认值。

我在使用这些值时遇到了一些问题，希望有人能提供帮助。

这可能不是最好的方法，但这是我迄今为止想出的。

这是一个为个人保留价值的模块 Resume => resume.rb

module Resume
  require 'ostruct'

  attr_reader :personal, :education

  @personal = OpenStruct.new

  @education = Array.new

  def self.included(base)
    set_personal
    set_education
  end

  def self.set_personal
    @personal.name          = "Joe Blogs"
    @personal.email_address = 'joe.blogs@gmail.com'
    @personal.phone_number  = '5555 55 55 555'
  end

  def self.set_education
    @education << %w{ School\ 1 Description\ 1 }
    @education << %w{ School\ 2 Description\ 2 }
  end
end

从 irb 它工作正常：

% irb -I .
1.9.3-p194 :001 > require 'resume'
 => true 
1.9.3-p194 :002 > include Resume
 => Object 
1.9.3-p194 :003 > puts Resume.personal.name
Joe Blogs
 => nil

但是，当我将它包含到一个类中时，它会抛出错误 => build.rb

require 'resume'

class Build
  include Resume

  def build
    puts Resume.personal.name
  end
end

来自 irb：

% irb -I .
1.9.3-p194 :001 > require 'build'
 => true 
1.9.3-p194 :002 > b = Build.new
 => #<Build:0x00000001d0ebb0> 
1.9.3-p194 :003 > b.build
NoMethodError: undefined method `personal' for Resume:Module
    from /home/oolyme/projects/lh_resume_builder_ruby/build.rb:7:in `build'
    from (irb):3
    from /home/oolyme/.rvm/rubies/ruby-1.9.3-p194/bin/irb:16:in `<main>'

我尝试了一些变体来输出 Build 类实例中的包含模块变量，但都出错了。

4

1 回答 1

0

attr_accessor创建了几个实例方法，这意味着它们将在Build. 但是您显然想要类实例方法。将模块的定义更改为：

module Resume
  require 'ostruct'

  def self.personal
    @personal
  end

  def self.education
    @education
  end

  def self.included(base)
    @personal = OpenStruct.new
    @education = Array.new

    set_personal
    set_education
  end

  def self.set_personal
    @personal.name          = "Joe Blogs"
    @personal.email_address = 'joe.blogs@gmail.com'
    @personal.phone_number  = '5555 55 55 555'
  end

  def self.set_education
    @education << %w{ School\ 1 Description\ 1 }
    @education << %w{ School\ 2 Description\ 2 }
  end
end

它会起作用的

b = Build.new
b.build # >> Joe Blogs
于 2012-11-19T05:33:04.313 回答