Uninitialized constant error

ruby-talk
1

I have three ruby classes, see below:

1. base_cls.rb

File.dirname(__FILE__)+'/cls_factory'
class BaseCls

  def self.say
    ClsFactory.say
  end
end
BaseCls.say

2. sub_cls.rb

require File.dirname(__FILE__)+'/base_cls'

class SubCls < BaseCls
end

3. cls_factory.rb

require File.dirname(__FILE__)+'/sub_cls'

class ClsFactory
  def self.get_cls
    SubCls.new
  end
end

When I run base_cls.rb, I got this error:

base_cls.rb:5:in `say': uninitialized constant BaseCls::ClsFactory
(NameError)

I don't understand why this error happens? Can anyone help me on this?

thanks.

···

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2

Maybe you meant to prefix the first line in base_cls.rb with "require"?

Stefan

···

2009/1/30 Zhao Yi <youhaodeyi@gmail.com>:

I have three ruby classes, see below:

1. base_cls.rb

File.dirname(__FILE__)+'/cls_factory'
class BaseCls

def self.say
   ClsFactory.say
end
end
BaseCls.say

2. sub_cls.rb

require File.dirname(__FILE__)+'/base_cls'

class SubCls < BaseCls
end

3. cls_factory.rb

require File.dirname(__FILE__)+'/sub_cls'

class ClsFactory
def self.get_cls
   SubCls.new
end
end

When I run base_cls.rb, I got this error:

base_cls.rb:5:in `say': uninitialized constant BaseCls::ClsFactory
(NameError)

I don't understand why this error happens? Can anyone help me on this?

3

Stefan Lang wrote:

Maybe you meant to prefix the first line in base_cls.rb with "require"?

Stefan

Oh, sorry, I forgot to type the 'require'. But the problem is still
there.

···

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