[Zope] How to search for empty properties in ZCatalog - nifty solution

29 Dec 1999

      The following python method returns a list of all the empty properties in
the ZClass it's a method of.  Add it as a KeywordIndex to your ZCatalog, and
you can search for empty properties easily.

For example, if you want to find all object where 'title' is empty, use:
<dtml-in "catalog({'emptyProperties' : 'title'})">
...
</dtml-in>

================================================================
# ** function name: emptyProperties
# ** parameters: self

## Return list of all empty properties in our propertysheets
##

emptyproperties = [] #empty properties

propertysheets = self.propertysheets.items()

i = 0
for sheetname in propertysheets:
	sheetname = sheetname[0]
	if sheetname == 'webdav':
		i = i + 1
		continue
	psheet = self.propertysheets[i]

	validprops = []
	for pmap in psheet.propertyMap():	
		if pmap['type'] in ['string', 'text']: validprops.append(pmap['id'])

	for pname, pcontent in psheet.propertyItems():
		if (pname in validprops) and (not pcontent): emptyproperties.append(pname)

	i = i +1

return emptyproperties

[Zope] How to search for empty properties in ZCatalog - nifty solution

Itamar Shtull-Trauring