I'm trying to find a workaround for some query cursor limitations. Say that I have entities with date and an value which is a multiple of ten from 0 to 100.
I need to get paginated entities sorted by date and with the integer field above a given threshold, along the lines of the pseudo code: SELECT * FROM entity WHERE integer >= 50 ORDER BY date DESC What's the best way to do this? My thoughts are below. As the docs say, I can't use an inequality on the integer field since then I'd have to sort by the integer first. Instead of using integer values, I though Icould use strings: '0', '10', '20', etc., and then use a query like this to get entities with a value of 70 or more: SELECT * FROM entity WHERE integer IN [70,80,90] ORDER BY date DESC But as the docs say, cursors can't be obtained from queries for entities that use contains() (i.e., IN) or even disjunctions (value == '70' || value == '80'...). My question is would a multiple value property (a list) work for this? My idea is to set the all the values up to the true entity value, e.g., if the entity value was '40', then the MVP would be ['0', '10', '20', '30', '40']. Then if the threshold was 20, then entities such as this would (I believe) be returned by a query like SELECT * FROM entity WHERE value == '20' ORDER BY date DESC Can you obtain a cursor from such a query or is there a better way? Thanks, Glenn -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
