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rubyinheritancepathname

How do I inherit from Pathname in Ruby?

I have a RemoteFile that inherits from Pathname

class RemoteFile < Pathname
end

I create a remote file, and get its parent

    irb> RemoteFile.new('.')
     => #<RemoteFile:.> 
    irb> RemoteFile.new('.').parent
     => #<Pathname:..>

Is there any way to get Pathname to return RemoteFiles besides monkey-patching a dozen methods in Pathname? Wouldn't it work better if Pathname returned objects of type self.class.new?

Solution

  • You could consider delegating to an actual Pathname object. Have a look at this article. This way you wouldn't have to monkey patch anything, and because of delegation, you could modify things in a safer, more controllable way.