Le 26 juin 08 à 17:23, Derek Richardson a écrit :
Martin Aspeli wrote:
Derek Richardson wrote:
Looking at the distributed source for GS 1.3.3, I see upgrade.py,
but can't find the tests or docs. Will someone point me at them?
Or, else, point me at a good web resource? /me remembers seeing a
couple good blog posts, but can't find them now...
The last chapter in my book mentions them briefly. I had to figure
it out from reading the tests in GenericSetup itself though. :-/
Thanks! That brief mention is very helpful.
My question. I have v1 of a product that contains GS for utilities A
and B. In v2, I am adding a utility C. If someone upgrades, I want
them to get C without re-installing A or B, to prevent data loss.
However, if someone installs v2 fresh, I want them to get A, B,
*and* C. Will registering an upgrade step for v1 to v2 that installs
C accomplish this? I imagine it does, as the upgrade step would be
of limited utility without this functionality, but haven't seen this
explicitly stated anywhere.
Yes it does. The handler of an upgrade step is just a function that
has the portal_setup object(*) as argument. This function only needs
to add C, either programmatically or by running a GS import step like
this :
def myUpgradeHandler(setuptool):
"""Add only C to existing config"""
setuptool.runAllImportStepsFromProfile('profile-
my.component:upgrade_v1_v2', ...)
Of course you need to register with some ZCML that extension profile
(upgrade_v1_v2 for my.component) that only contains features of C.
when the defaut profile contains A, B and C.
(*) I would have preferred a "context" as in usual setup handlers,
such functions from setup handlers could be used easily from upgrade
steps.
/me tried reading the GS tests, but your explanations (in book and
online) are much more digestible. ;)
Derek
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