[Zope] Keyword index search

[Garito]

Hi all

I have a ZCatalog object with a keywordindex called keywords

I would like to search some objects with keywords ['k1', 'k2', k3', 
'k4'] for that I use:

return context.catalog({'keywords': {'query': ['k1', 'k2', k3', 'k4'], 
'operator': 'and'}})

but these query returns objects with keyword = ['k2', 'k3'] (for me 
incorrect, I would like to find objects with *all* keywords

How can I make these kind of querys?

Thanks!

-- 
Mis Cosas
http://blogs.sistes.net/Garito/