limitby=(a,b) returns rows[i] for a <= i < b
On Nov 4, 3:30 am, Mengu <whalb...@gmail.com> wrote: > hi everyone. > > i have a problem with paginating my results. i guess i didn't > understand the logic in limitby. > > normally an sql query SELECT * FROM post LIMIT 2 OFFSET 0 displays the > first 2 results. And I can get the first 2 records with db > (db.post.id>0).select(limitby(0,2)). so limit is 2 and offset is 0. > > however the problem is, this query fails: > db(db.post.id>0).select(limitby(2,2)). in this query the limit is 2 > and the ofset is 2 either. however it doesn't return select * from > post limit 2 offset 2 but it returns select * from post limit 0 offset > 2 because in sql.py 2846 limit is lmax - lmin and offset is lmin. i > have edited that line as sql_o += ' LIMIT %i OFFSET %i' % (lmax, lmin) > and it is working as expected. now my pagination is working. > > here is my codes for pagination: > perpage = 2 > totalposts = db(db.post.id > 0).count() > totalpages = totalposts / perpage > page = int(request.vars.page) if request.vars.page else 1 > limit = int(page - 1) * perpage > posts = db(db.post.id > 0).select(orderby=~db.post.id, limitby=(limit, > perpage)) > > please let me know if there's another page for doing this. > > sincerely > Mengu --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py-users" group. To post to this group, send email to web2py@googlegroups.com To unsubscribe from this group, send email to web2py+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
