[Product-Developers] Re: How to import catalog.xml without emptying the indexes

[Maurits van Rees]

Hi Giovanni,

Giovanni Toffoli, on 2009-02-10:
> Two questions:
> 1.
> Anybody knows if during the last months the way genericsetup handles the 
> index definitions has been improved, possibly by implementing some "keep" or 
> "purge" attribute ?
> (see also the extensive discussion by Maurits van Rees at 
> http://mail.zope.org/pipermail/zope-cmf/2007-March/025664.html )

There has been no change that I am aware of.  I think the summary is
that comparing the xml settings with the current settings is doable
for simple indexes, but not for complex ones like TextIndexNG3; so
this is not likely to get fixed.

> 2.
> It is possible to know whether setuphandlers.py, is is being executed as 
> result of an "install" or of a "reinstall" action ?

No.  My current strategy is to do to it all in python code, in
setuphandlers.py:

========================================================
def add_catalog_indexes(site, logger):
    """Add our indexes to the catalog.

    Doing it here instead of in profiles/default/catalog.xml means we
    do not need to reindex those indexes after every reinstall.
    """
    catalog = getToolByName(site, 'portal_catalog')
    indexes = catalog.indexes()
    wanted = (("getAssignees", "KeywordIndex"),
              ("getBookingDate", "DateIndex"),
              ("getBillableProject", "FieldIndex"),
             )

    for name, meta_type in wanted:
        if name not in indexes:
            catalog.addIndex(name, meta_type)
            logger.info("Added %s for field %s.", meta_type, name)
========================================================

Cheers,

-- 
Maurits van Rees | http://maurits.vanrees.org/
            Work | http://zestsoftware.nl/
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