CLR interop bug?

Ruby IronRuby
1

Hi
What is the nitty gritty around monkey patching CLR classes. When I’m
monkey
patching I should be able to get to the protected members of a class
right?
And the private members too (I see it kind of like partial classes)?

public class AggregatorRepository :
RepositoryBase
{
public
AggregatorRepository(UnitOfWorkScopeBase
unitOfWorkScope) : base(unitOfWorkScope)
{
}

//Some C# methods here that use Linq and Expressions for querying

}

Repository base defines a protected property UnitOfWorkScope

I monkey patched it like so

module MediaAggregator
module Models
module Lightspeed

  class AggregatorRepository

    def users
      uow.method(:find).of(User).call
    end

    def uow
      self.unit_of_work_scope.current
    end

  end
end

end
end

Calling the users method result in an error complaining about a
protected
unit_of_work_scope method. And ironically the error talks about my
situation
as being the solution:
*
*
C**LR protected method `unit_of_work_scope’ called for
MediaAggregator.Models.Lightspeed.AggregatorRepository:MediaAggregator::Models::Lightspeed::AggregatorRepository;
CLR protected methods can only be called with a receiver whose class is
a
subclass of the class declaring the method

Do I put this on codeplex or am I reading the error wrong? As far as I
can
tell I am subclassing a class.

Met vriendelijke groeten - Best regards - Salutations
Ivan Porto C.
Blog: http://flanders.co.nz
Twitter: http://twitter.com/casualjim
Author of IronRuby in Action (http://manning.com/carrero)

2

The error message might be more clear:

CLR protected method `unit_of_work_scope’ called for
MediaAggregator.Models.Lightspeed.AggregatorRepository:MediaAggregator::Models::Lightspeed::AggregatorRepository;
CLR protected methods can only be called with a receiver whose class is
a Ruby subclass of the class declaring the method

You need to derive a Ruby class from the CLR class and use its instance
to call the method. What we need to do internally is emit a CLR subtype
of the CLR type that proxies protected method calls coming from Ruby
code. When you monkey-patch a CLR method it doesn’t mean you are “in the
type”. You are still outside of the type, so you still have the same
visibility restrictions on CLR members as if they were called from any
other Ruby/CLR method. IronRuby just overlays Ruby methods over the CLR
type, it cannot “open” the type.

Tomas

From: [email protected]
[mailto:[email protected]] On Behalf Of Ivan Porto
Carrero
Sent: Tuesday, June 09, 2009 12:28 PM
To: ironruby-core
Subject: [Ironruby-core] CLR interop bug?

Hi

What is the nitty gritty around monkey patching CLR classes. When I’m
monkey patching I should be able to get to the protected members of a
class right? And the private members too (I see it kind of like partial
classes)?

public class AggregatorRepository :
RepositoryBase
{
public
AggregatorRepository(UnitOfWorkScopeBase
unitOfWorkScope) : base(unitOfWorkScope)
{
}

//Some C# methods here that use Linq and Expressions for querying

}

Repository base defines a protected property UnitOfWorkScope

I monkey patched it like so

module MediaAggregator
module Models
module Lightspeed

  class AggregatorRepository

    def users
      uow.method(:find).of(User).call
    end

    def uow
      self.unit_of_work_scope.current
    end

  end
end

end
end

Calling the users method result in an error complaining about a
protected unit_of_work_scope method. And ironically the error talks
about my situation as being the solution:

CLR protected method `unit_of_work_scope’ called for
MediaAggregator.Models.Lightspeed.AggregatorRepository:MediaAggregator::Models::Lightspeed::AggregatorRepository;
CLR protected methods can only be called with a receiver whose class is
a subclass of the class declaring the method

Do I put this on codeplex or am I reading the error wrong? As far as I
can tell I am subclassing a class.

Met vriendelijke groeten - Best regards - Salutations
Ivan Porto C.
Blog: http://flanders.co.nz
Twitter: http://twitter.com/casualjim
Author of IronRuby in Action (http://manning.com/carrero)