TurboGears-1.0.4/SQLAlchemy-0.4 upgrade

[Toshio Kuratomi]

Hello TurboGears application developers,

We would like to upgrade the version of Turbogears and SQLAlchemy 
present on the Fedora Infrastructure app servers in the near future.

There are a few details that make this an update that I would like to 
have people test heavily but overall it should be an easy upgrade for 
most people.  Details:

TurboGears 1.0.4 is an update that retains TG-1.0.x compatibility.  We 
don't anticipate any problems with this portion.

SQLAlchemy 0.4 is an incompatible update to SA-0.3.x.  TurboGears-1.0.4 
includes changes to allow us to use it with minimal porting.  Most 
Fedora Web apps are using SQLObject so they shouldn't be affected by 
this update.  python-fedora's tgfas, pkgdb, and smolt use SQLAlchemy. 
loupgaroublond has already ported smolt so porting tgfas and pkgdb 
should be all that is needed to enable this.  I'll be testing ports of 
both of those this week.

If anyone has another web app that should be accounted for by this 
update, please *holler loudly*.

The two issues I anticipate:
1) FC6 is EOL but app3 is still FC6.  I've had success using EPEL-5 
packages on FC6/app3 for a few packages in the past but this could be a 
bit more involved as TurboGears has a lot of dependencies.  Unless we 
can plan on obsoleting app3 before we upgrade we'll need to do some 
testing on publictest1 as well as publictest10 to be sure that the TG 
package and dependencies work on FC6.

2) Because python-fedora has to be ported to the new SA API I also want 
to update the code to use the latest TurboGears conventions.  This will 
allow us to simplify the TG-Auth code quite a bit (I'll be able to get 
rid of about half of our code in favor of code that's carried in TG 
proper).  However, there is the risk that some of the bugs that we fixed 
when creating our code will be reintroduced because of this.  I'm 
thinking especially about the session bug where people would hit the 
login page and then not be logged in or hit the logout page but not be 
logged out.  Since that bug was hard to reproduce reliably, I'll need 
other people to help test this.

I'm getting the new python-fedora working on publictest10 right now and 
will be installing and testing the new stack on publictest1 soon 
(probably tomorrow.)  I'll send a note for people to beat on it while I 
port over the packagedb.

-Toshio

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