Jonathan Vanasco wrote:
> On Jul 9, 2007, at 6:51 PM, mla wrote:
>> Is there any reason not to support nested transactions at the app
>> level? I find them very useful. Otherwise you have to make sure your
>> transactions are always at the top-level, which makes things more
>> error-prone, IMO.
>>
> 
> my guess is that they're a nightmare to code for, and only used by so  
> few people.  there are so many other features/support that are  
> needed, and appeal to more users.

Hmmm. You mean a nightmare to use? They seem really natural to me.
Many other ORMs seem to implement them.

http://tangram.utsl.gen.nz/docs/Tangram/Tour.html#transactions
http://search.cpan.org/~danieltwc/DBIx-Class-0.07002/lib/DBIx/Class/Manual/Cookbook.pod#Transactions

>> But now I need nested transactions if I'd going to make do_transfer()
>> part of a larger transaction.
>>
>> How do you guys handle that?
> 
> would this help?
>       http://search.cpan.org/~crakrjack/DBIx-Transaction-0.008/
> 
> I use something similar -- a db factory with handle wrappers that are  
> transaction aware.  the only difference between what i use and tylers  
> is that i overload connect  as a transaction start .  otherwise, i  
> like tylers interface much more than my own, and am hoping to migrate  
> to it soon.

Yes, thank you. That seems like a nice general solution. I'll try to
get that working with Rose::DB.

Do you use Rose::DB's do_transaction() or your own interface?

Maurice

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