Rails - Feb 2006 - Trapping specific errors

Hi,

I have a begin rescue clause and want to trap for specific errors

begin
  cause error
rescue Excpetion => err
  case err
    when SocketError
      do stuff
    when ... # trap for ErrNo::EINVAL
  end
end

Say I get the error ErrNo::EINVAL ... how/where can I find out what the 
Excpetion for it is named?

I have tries ErrNo::EINVAL, ErrNo::EINVALError, EINVALError, but none of 
these seem to trap the exception ....

Any help please

Thanks
Joerg

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

I found the answer in my PickAxe.

Errors like Errno:: are SystemCallErrors that the operating throws, and 
they are contained in a module called Errno ... <- note the small
''n''.

So to trap an invalid argument error for example, use Errno::EINVAL

No need to append it with ''Error'' either.

Sorry for noise.

Joerg Diekmann wrote:
> Hi,
> 
> I have a begin rescue clause and want to trap for specific errors
> 
> begin
>   cause error
> rescue Excpetion => err
>   case err
>     when SocketError
>       do stuff
>     when ... # trap for ErrNo::EINVAL
>   end
> end
> 
> Say I get the error ErrNo::EINVAL ... how/where can I find out what the 
> Excpetion for it is named?
> 
> I have tries ErrNo::EINVAL, ErrNo::EINVALError, EINVALError, but none of 
> these seem to trap the exception ....
> 
> Any help please
> 
> Thanks
> Joerg

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