From: Francis Hwang <sera@...>
Date: 2002-05-23T20:50:46+09:00
Subject: Re: Marshal error: "singleton can't be dumped"

Patrick May wrote:

>Francis Hwang <sera@fhwang.net> wrote in message 
>news:<a05100302b91148c7a866@[10.0.1.18]>...
>>  Kent Dahl wrote:
>>  >Then perhaps it is refering to singleton methods?
>>
>>  Ah, never mind, I dug into the object I was trying to Marshal and
>>  realized that it held an instance of CGI that Ruby didn't want to
>>  Marshal. I fixed that, and things seem to work fine now.
>
>ahh... b/c cgi params can have singleton methods.
>
>well, that makes my :values plan sound like a bad idea... :-)

It's not necessarily that big of a deal. You can take in a singleton 
class in any given method, you just can't hold on to it. So in my 
class' initialize method, I just sucked out all the data I wanted out 
of the cgi instance, and put it into a hash. Pretty minor, actually.

I also had a class that held onto an instance of Mysql, but you don't 
actually need to preserve that actual instance, you just need to know 
to have a valid Mysql connection ... So I had to hack the _load and 
_dump code to deal with that member variable specially, but the whole 
thing only took me a few minutes.

Francis
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