Ok. I figured out where one of these errors comes from...
If i have a manager class that does:
$res= Manager->get(
with_objects=> ['child']
);
and i access
$res->child
this gets called
Rose::DB::Object::MakeMethods::Generic::object_by_key
and I'm catching an error on line 2180
return undef unless($obj->load(speculative => 1));
which is part of the 'get_set_on_save' interface ( line 1993)
=====
now the issue is caused from when i set the default rose db object to
be 'null', which isn't a valid db -- as i make a rose db object with
specific args and pass it in to the object so i can control
transactions better ( i've migrated 70% of 1 webapp to rose, and
about 40% of another. all of the rose stuff needs to encapsulate
within other db logic )
what was exactly happening in this case is :
I was saving an object 'as yaml' to memcached
I expected the object to contain with_object / require_objects
subclasses -- it does not
when i populated, share_db clones a new class of my default rose db
object - which is invalid by design
when i accessed the child object, it tried to load ( as it was not
already )
to fix it, i saved the child object as a sep. memcached key, and
integrated by hand.
i just wanted to let people know, that this behavior exists. some
might expect Rose to work like this , and be right. others might
expect it to work differently, and plow through source for a few hours.
I'll have to track down more cases of this db connection issue.
I think this might be happening elsewhere:
share_db clones a new class of the default rose db object
i expect share_db to clone a new class of the current rose db object
( which could be the default object, but with some overridden
connect args )
but that is probably well outside of the scope of what John wants
rose to handle, and I'm not even sure that's what is going on.
On Oct 9, 2006, at 2:57 PM, Jonathan Vanasco wrote:
> This is an odd issue...
>
> I'm using Rose::DB::Object under mod_perl & apache::dbi
>
> During setup i connect with a real db handle so I can prime_all_caches
>
> Then I disconnect and do a little swap, setting the db args to NULL/
> NULL/NULL -- this is just to make sure that Rose doesn't handle any
> of its own connections. i'm using connection pooling and multiple
> handles / transactions, so I just create rose::db objects with
> whatever db i'm using at the time, and pass them to rose::db::object
> objects as needed.
>
> the problem is that after long periods of inactivity on my dev box, i
> get
>
> [Mon Oct 09 14:51:04 2006] [error] [client 127.0.0.1] DBI connect
> ('dbname=NULL;host=localhost','NULL',...) failed: FATAL: database
> "NULL" does not exist\n at /Library/Perl/5.8.6/Rose/DB.pm line 685
> \nCompilation failed in require at /Library/Perl/5.8.6/darwin-thread-
> multi-2level/Apache2/Reload.pm line 160.\n
>
> so reload (?) or rose is causing this non-functional rose::db class
> to try and connect-- which it never can.
>
> before doing a dirty hack ( tossing in a sqlite or something )- i was
> hoping someone could point me to where I can better track this down
> to catch it.
>
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// Jonathan Vanasco
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