Re: Returning a CLR type from IronRuby

> [A]Horn.Core.DSL.Domain.BuildMetaData cannot be cast to
> [B]Horn.Core.DSL.Domain.BuildMetaData. Type A originates from
> 'Horn.Core.DSL.Domain, Version=1.0.0.0, Culture=neutral,
> PublicKeyToken=null' in the context 'LoadNeither' at location
> 'C:\Projects\horn\branches\rubydsl\src\Horn.Dsl.Specificatioin\bin\Debug\Horn.Core.DSL.Domain.dll'.
> Type B originates from 'Horn.Core.DSL.Domain, Version=1.0.0.0,
> Culture=neutral, PublicKeyToken=null' in the context 'Default' at location
> 'C:\Users\paul.cowan\AppData\Local\Temp\1vt2usw2.rxf\Horn.Dsl.Specificatioin\assembly\dl3\1d5ed945\7c19e429_1a97c901\Horn.Core.DSL.Domain.DLL'.

While you'd probably get better answers at a Ruby-specific site, I'll
give it a try: The problem seems to be that IronRuby loads the
Horn.Core.DSL.Domain.dll assembly for a second time (and from a
different location), so the BuildMetaData type used by your IronRuby
class is not the same as the one used by the C# class.

Can you try to do the following:
engine.Runtime.LoadAssembly (typeof (BuildMetaData).Assembly); // or similar

at the beginning?

Fabian

On Tue, Mar 3, 2009 at 7:22 AM, Paul Cowan <[email protected]> wrote:
> Hi,
>
> I am trying to return a CLR object from Iron Ruby.
>
> I have the following CLR type defined in C#
> public class BuildMetaData
> {
>    public string Description { get; set; }
> }
>
>
> I have the following IronRuby file:
>
> $:.unshift(File.dirname(__FILE__) + '/../bin/Debug')
> require 'mscorlib'
> require 'Horn.Core.DSL.Domain'
>
> class MetaDataFactory
>    def return_meta_data()
>        meta = Horn::Core::DSL::Domain::BuildMetaData.new
>        meta.Description = "A description of sorts"
>        meta
>    end
> end
>
> I have the following test that is failing:
>
> [Fact]
> public void Then_a_build_metadata_object_is_returned()
> {
>    var engine = Ruby.CreateEngine();
>
>    engine.ExecuteFile("test.rb");
>
>    var code = String.Format("{0}.new.method :{1}", "MetaDataFactory",
> "return_meta_data");
>
>    var action = engine.CreateScriptSourceFromString(code).Execute();
>
>    var result = (BuildMetaData)engine.Operations.Call(action);
>
>    Assert.Equal(result.Description, "A description of sorts");
> }
>
>
>
>
> It fails when trying to cast the object returned from IronRuby.
>
> I get the following error message:
>
> [A]Horn.Core.DSL.Domain.BuildMetaData cannot be cast to
> [B]Horn.Core.DSL.Domain.BuildMetaData. Type A originates from
> 'Horn.Core.DSL.Domain, Version=1.0.0.0, Culture=neutral,
> PublicKeyToken=null' in the context 'LoadNeither' at location
> 'C:\Projects\horn\branches\rubydsl\src\Horn.Dsl.Specificatioin\bin\Debug\Horn.Core.DSL.Domain.dll'.
> Type B originates from 'Horn.Core.DSL.Domain, Version=1.0.0.0,
> Culture=neutral, PublicKeyToken=null' in the context 'Default' at location
> 'C:\Users\paul.cowan\AppData\Local\Temp\1vt2usw2.rxf\Horn.Dsl.Specificatioin\assembly\dl3\1d5ed945\7c19e429_1a97c901\Horn.Core.DSL.Domain.DLL'.
>
> The only way I can access the members of the BuildMetaData is using
> reflection.
>
> If you look at the error message, both types are in different locations.
>
> Is there a way round this yet in Ironruby?
>
> Cheers
>
> Paul
>
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