[ckan-dev] sqlalchemy migrate, dependency issues.

Wed Jan 26 20:30:28 UTC 2011

Well it's only an issue when we upgrade CKAN, so let's focus on those
that we do need to migrate. I'm needing on gvt servers later this week
so I'll have a play if David doesn't get there first. I suggest we
check-in a change that changes the requirement in setup.py to
sqlalchemy>=0.6 and a migration script that prints a warning showing
the need to run this migrate tool (assuming the migrate script can't
run it itself?).

Dave

On 26 January 2011 13:41, Friedrich Lindenberg <friedrich at pudo.org> wrote:
> Hi all,
>
> On Wed, Jan 26, 2011 at 10:08 AM, David Read <david.read at okfn.org> wrote:
>> The question is whether we're happy to run the migrate tool in all our
>> CKAN databases, since some of them may be running old CKAN versions,
>> perhaps due to old-style plug-ins and customisations.
>
> Just to say: this is a non-trivial effort. There are at the moment
> about 28 instances, quite a few of which run on a rather outdated
> version. We're increasingly also seeing instances deployed on machines
> which we do not have access to or which we're not authorized to change
> freely.
>
> Essentially, anything that breaks the migration path should be a
> non-starter if there isn't a strong, architectural reason to do it.
>
> - Friedrich
>
> p.s. I have just done a sqla migrate 0.5 -> 0.6 migration on another
> project [1] and it just required rewriting the migrations a bit. While
> this is ugly, I don't really see a reason for not doing it?
>
> [1] http://trac.adhocracy.de/changeset/8fb58702ce657f10cdf0ac4b39ff0b70c2e1f51d
>
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