Ironruby core - Aug 2010 - mscorlib:0:in `ThrowArgumentException' error

Hi all,

I''m having an error that I can''t figure out what it is:

This portion of code works perfectly by itself
--------------------
config = [{:QuantityPer => "\#{2+2}"}]
config.each { |xx| if xx[:QuantityPer].include? ''#{'' then
  xxx = xx[:QuantityPer].to_s
  xxx = xxx[2..(xxx.size-2)]
  puts xxx
  xx[:QuantityPer] = eval(xxx)
  puts xx[:QuantityPer]
  end
  }
-------------------
prints
2+2
4
as supposed
------------

However in the middle of a routine throws this error:
-----------------------
2+2
mscorlib:0:in `ThrowArgumentException'': An item with the same key has
already been added. (ArgumentError)
        from mscorlib:0:in `Insert''
        from ./xxx_master.rb:641:in `eval''
-----------------------
the line 641 actually is the one corresponding to the beginning of the
"config.each" statement and not the one for the eval...

Could someone point me in the right direction?

Thank you in advance

Eduardo blumenfeld
-- 
Posted via http://www.ruby-forum.com/.

Any Ideas?

Thank you in advance,

Eduardo Blumenfeld
-- 
Posted via http://www.ruby-forum.com/.

Hi Eduardo,

What is config''s type? Is it a regular Ruby list, or is it some sort of
collection returned from a .NET library? Maybe it''s one of the items in
the
config - could you provide a listing of the items in the config when you run
the code? It would also help if I could some of the surrounding routine.

I do find it hard to believe that''s exactly what your code looks like,
unless you actually have a list of hashes where every key is :QuantityPer.
As an example, the following breaks:

config = [{:QuantityPer => "\#{2+2}"}, {:foo =>
"bar"}]
# .. the rest of your code here ...

# Prints the following:
2+2
4
NoMethodError: undefined method `include?'' for nil:NilClass
        from (irb):28
        from (irb):28:in `each''
        from (irb):28
        from C:/IronRuby/lib/ruby/1.8/irb.rb:150:in `eval_input''
        from C:/IronRuby/lib/ruby/1.8/irb.rb:257:in `signal_status''
        from C:/IronRuby/lib/ruby/1.8/irb.rb:147:in `eval_input''
        from C:/IronRuby/lib/ruby/1.8/irb.rb:146:in `eval_input''
        from C:/IronRuby/lib/ruby/1.8/irb.rb:70:in `start''
        from C:/IronRuby/lib/ruby/1.8/irb.rb:69:in `catch''
        from C:/IronRuby/lib/ruby/1.8/irb.rb:69:in `start''
        from C:/IronRuby/bin/irb:13



Regards,

Charles

On Sat, Aug 28, 2010 at 9:33 AM, Eduardo Blumenfeld <lists at
ruby-forum.com>wrote:
> Any Ideas?
>
> Thank you in advance,
>
> Eduardo Blumenfeld
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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Thank you Charles for the answer,

config is an active record produced list, an array of rows brought from 
a sql table that has one of its attributes (table column) => 
:QuantityPer

This is the portion of the code I''m using
--------------
config = Term.find_by_sql("sp_someStoredProc
@someparameter=#{param1}")
config.each { |xx| if xx[:QuantityPer].nil? then nil else
if xx[:QuantityPer].include? ''#{'' then
 xxx = xx[:QuantityPer].to_s
 xxx = xxx[2..(xxx.size-2)]
 puts xxx
## error line
 xx[:QuantityPer] = eval(xxx)
## error line
 puts xx[:QuantityPer]
 end
 end
 }
--------------
The error line line is the one I''m showing
EUREKA!!!

While I was answering you, I think figured out the problem, (I have to 
test it though)

The problem has to do with the fact that the active record model has 
attr_readonly set as:
------------------
class Term < ActiveRecord::Base
  attr_readonly
end
------------------

What is puzzling to me is the cryptic error, not having a complete trace 
of
the troubling gem (in this case the active_record) with this kind of 
errors

Thank you, Thank you

I will post the results of the test as soon as It works!

Eduardo Blumenfeld
-- 
Posted via http://www.ruby-forum.com/.

Hi all,

Unfortunately it didn''t work,

I believe that there is some kind of problem in mscorlib
when you try to do an eval inside a loop with active record objects.

Eduardo Blumenfeld wrote:
> Thank you Charles for the answer,
> 
> config is an active record produced list, an array of rows brought from 
> a sql table that has one of its attributes (table column) => 
> :QuantityPer
> 
> This is the portion of the code I''m using
> --------------
> config = Term.find_by_sql("sp_someStoredProc
@someparameter=#{param1}")
> config.each { |xx| if xx[:QuantityPer].nil? then nil else
> if xx[:QuantityPer].include? ''#{'' then
>  xxx = xx[:QuantityPer].to_s
>  xxx = xxx[2..(xxx.size-2)]
>  puts xxx
# => "some_proc(argument,argument2)"
I see in the console the xxx variable...
if at this point I put this code:
--------------------
puts "#{xxx}"
--------------------
it just prints (again) the xxx variable without
evaluating it at all

if at this point I put this code instead:
--------------------
aaa = eval(xxx)
--------------------
then I get this error:

mscorlib:0:in `ThrowArgumentException'': An item with the same key has 
already been added. (ArgumentError)
        from mscorlib:0:in `Insert''

Any pointers?

Is that an mscorlib bug?
-- 
Posted via http://www.ruby-forum.com/.

Hi all,

I finally solved the issue:
By calling another procedure and within that procedure do the eval, it 
works perfectly.

However, this seems to be a bug anyways...

Regards,

Eduardo
-- 
Posted via http://www.ruby-forum.com/.

Hi Eduardo,

This looks like it could be a bug in IronRuby... or possibly the
ActiveRecord adapter. That exception that is being thrown is from a
Hashtable or Dictionary; a value is being inserted with an existing key.
Typical Ruby code won''t ever use a .NET specific type such as Hashtable
or
Dictionary (of course), which makes me think that this might be a bug in
IronRuby... or possibly your ActiveRecord adapter (assuming it''s tailor
made
for IronRuby).

I''d hate to make you jump through hoops, but it would be great if you
could
lend me a hand in figuring this one out.  If you could send me a small
repro, that would be great; baring that, I have some questions for you:


What sort of AR adapter are you using?

Could you give me the "actual" stack trace for this exception? This
should
do the trick:

begin
  # ... the line of code that throws ...
rescue Exception => e
  # use the following to get the actual .NET/System.Exception stack trace:
  puts e.StackTrace
end


Thanks,

Charles


On Sun, Sep 5, 2010 at 5:59 PM, Eduardo Blumenfeld <lists at
ruby-forum.com>wrote:
> Hi all,
>
> I finally solved the issue:
> By calling another procedure and within that procedure do the eval, it
> works perfectly.
>
> However, this seems to be a bug anyways...
>
> Regards,
>
> Eduardo
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
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