[Ironruby-core] Trying to run _why's Camping framework on IronRack / IIS

Mon Aug 31 23:27:52 EDT 2009

Cool! Great repro. This issue is related to bug http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=1535 (Range is Enumerable and therefore implements Enumerable#to_a, which should be called by * operator). I’ve amended it and increased its priority to High.

The workaround is to call to_ary/to_a explicitly:

>>> r = 'a'..'d'
=> "a".."d"
>>> [*(r.respond_to?(:to_ary) ? r.to_ary : r.to_a)].size
=> 4

Tomas

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Philippe Monnet
Sent: Monday, August 31, 2009 7:50 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] Trying to run _why's Camping framework on IronRack / IIS

Now that I can run a minimalistic Camping app, I am moving on to get the Camping Blog app example to work.
As I am now testing additional features like Camping session and access to ActiveRecord on SQL Server, I am starting a list of issues I have encountered. These issues seem triggered by differences between the two Ruby implementations.
For example, the following code is used in the generation of a Camping session id:

    - in MRI:
           irb(main):001:0> [*'a'..'d']
           => ["a", "b", "c", "d"]
           irb(main):002:0> [*'a'..'d'].size
           => 4

    - in IR:
            >>> [*'a'..'d']
            => ["a".."d"]
            >>> [*'a'..'d'].size
            => 1

As of tonight I can now establish a session and get the cookies and session state to work right. But forms Once I am done, I will write-up the other findings and work-arounds.

Philippe

Jimmy Schementi wrote:
Ah, gotcha. Thanks for the explanation Tomas. I'll make that change.

~Jimmy
Sent from my phone

On Aug 30, 2009, at 10:24 PM, "Tomas Matousek" <Tomas.Matousek at microsoft.com<mailto:Tomas.Matousek at microsoft.com>> wrote:
The constant is not set when hosting IR and using Engine.Execute() or ScriptScope.Execute().
It is only set by ScriptSource.ExecuteProgram(). The reason is that each call to the former methods creates a new top-level binding and therefore we don’t know which one should be the one that is stored in TOPLEVEL_BINDING. The latter is meant to be used to execute the main top-level code (i.e. the “program”) and it sets the TOPLEVEL_BINDING up. It also handles SystemExit exception so that “exit” works according to Ruby’s semantics.

IronRack should probably use ExecuteProgram to execute the main request processing script.

Tomas

From: ironruby-core-bounces at rubyforge.org<mailto:ironruby-core-bounces at rubyforge.org> [mailto:ironruby-core-bounces at rubyforge.org] On Behalf Of Philippe Monnet
Sent: Sunday, August 30, 2009 1:05 PM
To: ironruby-core at rubyforge.org<mailto:ironruby-core at rubyforge.org>
Subject: Re: [Ironruby-core] Trying to run _why's Camping framework on IronRack / IIS

Today I dug deeper in the issue by breaking down the goes method of Camping in small chunks and evaluating them both in IR and MRI. I found that one thing expected by Camping was the global constant TOPLEVEL_BINDING.
Apparently the constant was not defined in IR. A Google search found it in:
    ironruby/Merlin/Main/Languages/Ruby/Libs/hacks.rb
And when I explicitly required it, the constant appeared and Camping worked immediately on IronRack.
Could someone explain what the constant is for and why it is located in hacks.rb?
Is it ok to I be using hacks.rb?

Philippe

PS - I am pretty excited to run Camping now! I just had to make a couple changes on top of IronRack to make it work.

Philippe Monnet wrote:
I have been leveraging IronRack to try to get a sample Camping application up and running.
I seem to be able to require the camping library fine but then as try to hit the famous "Camping.goes :Demo" line, IronRuby return an error stating that the constant #<Class:Camping> is not initialized.
So I tried to do the same test using the IR command line executable, but ran into the same issue (note that the same test works fine in IRB). What is strange is that the camping framework is loaded and if I query the constants in the Camping module I get back what I would expect. Is this a module loading issue? How can I troubleshoot this further?

Here is the IR's transcript:

    ---------------
    >ir
    IronRuby 0.9.0.0 on .NET 2.0.50727.3082
    Copyright (c) Microsoft Corporation. All rights reserved.

    >>> require 'rubygems'
    => true

    >>> gem 'rack'
    => true

    >>> require 'rack'
    => true

    >>> gem 'camping'
    => true

    >>> require 'camping'
    => ["Camping"]

    >>> require 'demo'
    C:/Ruby/lib/ruby/gems/1.8/gems/activesupport-2.3.3/lib/active_support/dependencies.rb:105:in `const_missing': uninitialized constant #<Class:Camping>::TOPLEVEL_BINDING (NameError)
            from C:/Ruby/lib/ruby/gems/1.8/gems/camping-1.5.180/lib/camping.rb:39:in `goes'
            from ./demo.rb:3
            from :0
            from :0:in `require'
            from custom_require.rb:30:in `require'
            from dependencies.rb:156:in `require'
            from dependencies.rb:490:in `new_constants_in'
            from dependencies.rb:154:in `require'

    ---------------
And the basic 'demo.rb' looks like the following:

require 'camping'

Camping.goes :Demo

module Demo
  def Demo.create
  end
end

module Demo::Models
end

module Demo::Controllers
  class Index < R '/'
    def get
      render :index
    end
  end
end

module Demo::Views
  def layout
    html do
      body do
        self << yield
      end
    end
  end

  def index
    h1 "#{@input.name}, Welcome to my IronCamping demo!"<mailto:#%7B at input.name%7D,WelcometomyIronCampingdemo%21>
  end
end

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