how about, if i denormalized everything . Mean book as id of subcategory. One entitygroup will only has one entity. any impact on that if i have too many separate entitygroups...? is this good practice in bigtable? if i do aware if i do this way, not be able to use transactional.
can you elaborate "The best (only ?) way to continue guaranteeing integrity of your data in to do it via a task for the second action (recreate) that you make transactional with the 1st (delete). " -- do you mean i should re-created book in subcategoryB first before do delete book from subcategoryA ? what do you mean "task", using background job ? any example? -- 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 [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-java?hl=en.
