Hi You can't in a query, the indexes only index values that exist, you would have to explicitly set properties to None or some other sentinal value by default to find objects that haven't had a property set.
Rgds T On May 1, 4:59 pm, Kwame <[email protected]> wrote: > How does one test for the presence or absence of a particular property > in an Entity? I looked through the > docs:http://code.google.com/appengine/docs/python/datastore/gqlreference.html > and only found this statement about it: > > "Note: conditions of the form property = NULL (which are equivalent) > check to see whether a null value is explicitly stored in the > datastore for that property. This is not the same as checking to see > if the entity lacks any value for the property! Datastore queries > which refer to a property never return entities which don't have some > value for that property." > > However it dosen't say what to actually do to determine this > condition. > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group > athttp://groups.google.com/group/google-appengine?hl=en. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
