I have a requirement to make searches with inequalities with multiple
properties.
This is not possible, as described in
http://code.google.com/appengine/docs/java/datastore/queriesandindexes.html#Restrictions_on_Queries
But I have to do it anyways. So, is there any hint on how to deal with
this?
My workaround (I'm doing the testing so far) :
- create a extra property that merges the content of the N properties you
wish to filter on
- query on that single extrat property with inequality filters
That is what geohash does when merging latitude AND longitude into one
single property :
