Re: [Zope-dev] Xron and Zope 2.4.0 again

26 Jul 2001

      Loren Stafford wrote:
...
...
I'm trying to use Zope 2.4.0 and Xron 0.0.9 on win98 (I've
applied the patch
to change "from Globals import DateTime" into "from DateTime import
DateTime")
[snip]
...
File C:\Zope\lib\python\Products\ZCatalog\Catalog.py, line 348, in
addIndex
TypeError: Catalog addIndex now requires the index type to
           be resolved prior to adding; create the proper index in the
caller.
[snip]
...
I've seen messages from users saying that Xron with the patch worked fine
for them with Zope 2.4.0.
So why doesn't it work for me ?
Probably because you are creating a new Schedule Zcatalog, whereas they were
using one already created in a prior version of Zope.
As far as I can tell the addIndex error results from changes to Catalog.py
made to support PluggableIndexes. I haven't been paying attention to this
development, so I have no clue what to do to make Xron compatible with
PluggableIndexes.
Can anyone point me in the right direction?
Before you might have done this:

self._catalog.addIndex('name', 'FieldIndex')

You now need to do this:

self._catalog.addIndex('name', UnIndex('name'))

The same goes for KeywordIndex (UnKeywordIndex) and TextIndex 
(UnTextIndex).

You'll also need

from SearchIndex.UnIndex import UnIndex
from SearchIndex.UnTextIndex import UnTextIndex
from SearchIndex.UnKeywordIndex import UnKeywordIndex

in there somewhere.

I patched tracked to adapt to either the old or new styles:

     field_indexes=('type', 'numid', 'exemptions', 'date', 'stage',
                    'priority', 'requester', 'from', 'private')
     keyword_indexes=('issueOwners','subscribers','traitVals')
     text_indexes=('text_content',)
     addIndex=self._catalog.addIndex
     # try to add indexes in Zope 2.3 style. If this fails
     # then add them in Zope 2.4 style
     try:
         for name in field_indexes:
             addIndex(name, 'FieldIndex')
         for name in keyword_indexes:
             addIndex(name, 'KeywordIndex')
         for name in text_indexes:
             addIndex(name, 'TextIndex')
     except TypeError:
         from SearchIndex.UnIndex import UnIndex
         from SearchIndex.UnTextIndex import UnTextIndex
         from SearchIndex.UnKeywordIndex import UnKeywordIndex

         for name in field_indexes:
             addIndex(name, UnIndex(name))
         for name in keyword_indexes:
             addIndex(name, UnKeywordIndex(name))
         for name in text_indexes:
             addIndex(name, UnTextIndex(name))

--
Steve Alexander
Software Engineer
Cat-Box limited