Requiring .NET assemblies

Ruby IronRuby
1

Hi,

I ran into a pretty weird issue, I tried to use some of the .NET ORM’s
with
IronRuby.
I haven’t investigated with the debugger turned on yet but here’s what I
observed

I tried this with ActiveRecord from Castle, SubSonic and LightSpeed.
Linq2Sql doesn’t have a problem.

What the first 3 ORM’s have in common is that I can use the types in the
actual ORM library. All of those ORM’s require you to have a generic
base
class.
If I include other types in the assembly (non generic base classes) then
I
can just use those classes.
When I create a type with a generic base class that is defined in the
same
assembly I can use that class in IronRuby

For SubSonic a Customer class could look like:

public class Customer : ActiveRecord{
// model code here
}

The output from the console session that shows the behavior. I tried a
lot
of different approaches but it always boils down to the same error.

*IronRuby 0.1 on .NET 2.0.50727.1434
Copyright © Microsoft Corporation. All rights reserved.

Note that local variables do not work today in the console.
As a workaround, use globals instead (eg $x = 42 instead of x = 42).

require ‘mscorlib’
=> true

require Dir.getwd + ‘/SubSonic.dll’
=> true

require Dir.getwd + ‘/DataAccess.SubSonic.dll’
=> true

include DataAccess::SubSonic
=> Object

Customer.new
IronRuby.Libraries:0:in ConstantMissing': uninitialized constant Object::Customer (NameError) from :0:inmain’
from :0:in `##16’

exit*

Is this a bug or is it a case of me missing something?

Cheers
Ivan

2

So, the Customer class was generated by SubSonic and is contained in
DataAccess.Subsonic.dll? Do you get the same results by leaving out the
include and saying

DataAccess::SubSonic::Customer.new

instead?

3

Yep

4

I got basically the same result when trying to use a SubSonic-generated
DLL
from IronPython. The Assembly.GetTypes function wasn’t able to resolve
the
generated classes because “Could not load file or assembly ‘SubSonic,
Version=2.0.3.0, Culture=neutral, PublicKeyToken=eadb47849839a332’ or
one of
its dependencies”
The problem went away when I copied the SubSonic DLLs into the same
directory as the executable.

5

You also have to create an rbx.config file otherwise it doesn’t know how
to
find the config file.

6

ah k I’ll try that thanks

7

Where is the assembly that contains Customer? Is that "
DataAccess.SubSonic.dll"?

BTW: ActiveRecord (from Castle) does not require you to inherit
ActiveRecordBase. You can just mark up your classes with attributes and
use
ActiveRecordMediator for all the CRUD.

-Eric

8

Yep the same thing happens, and i can elaborate on that
If it’s an assembly which only contains ie. ActiveRecord types then i
can’t
even execute include DataAccess::SubSonic

I tried many variations on the theme. Tried with signed assemblies vs
unsigned ones, tried different syntax structures, tried it in the
console
and in a file.

9

Thanks a lot that works :slight_smile: