[Mediawiki-l] Upgrading: what happens to extensions

Rob Church robchur at gmail.com
Tue Feb 21 15:28:31 UTC 2006

It depends on the extension and what it does. Those which alter the
database, for instance, will need to be upgraded as the wiki is, to
ensure that the schema available is as expected; the prominent example
of this would be the transition from 1.4 to 1.5 or above, where the
schema has been altered to make it more efficient, meaning that data
is no longer in cur / old tables.

I would recommend checking the documentation (if it exists) for the
extensions being used, and see what minimum versions are required.
Upgrading within a branch, however, should not alter the base code to
the point where an extension won't work.

It's a point that those authoring extensions need to consider; how is
their code affected by MediaWiki's? I, for example, write and test
extensions against the 1.5 release code and the 1.6 alpha code; but
those aren't compatible with older versions. Conversely, I've seen
extensions which continue to be released past 1.5 release dates, which
still assume the old schema.

Rob Church

On 21/02/06, Chris Earle (CBL) <cearle at cbltech.ca> wrote:
> Hi all,
> When you do an upgrade, how severely does it affect any extensions you've
> added?  In the young life of my wiki, I haven't added any major mods, a few
> css changes, etc.... but am thinking of incorporating more php-extensions,
> modifying code etc..... so will upgrading take note of these things or am I
> going to have to apply everything again?
> Thoughts appreciated,
> --
> Chris Earle
> System Solutions Specialist
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