But as you can see, no option to put a "Back" link, because queries must be exactly identical, the order can't change, the filters can't change, nothing can change. So the only possible solution I can think of is storing it somewhere, like using AJAX for paging and storing it in Javascript, or storing it in memcache. But both solutons are difficult to use.
On 6 feb, 02:23, Zeynel <azeyn...@gmail.com> wrote: > I asked the question at StackOverflow and there was a good answer but > I still could not make it > work:http://stackoverflow.com/questions/4840731/how-to-use-cursor-for-pagi... > > Nick Johnson has a blog post about it but it is more about the source > code than a practical > example:http://blog.notdot.net/2010/02/New-features-in-1-3-1-prerelease-Cursors. > > Can anyone explain to me how cursor works for pagination? Thanks! > > This is the code I am using: > > items = db.GqlQuery("SELECT * FROM Item ORDER BY date DESC > LIMIT 30") > #===========adding cursor here===========# > cursor = self.request.get("cursor") > if cursor: query.with_cursor(cursor) > items = query.fetch(30) > cursor = query.cursor() > > #===========adding cursor here===========# > > #===========regular output===========# > self.response.out.write("<ol>") > for item in items: > self.response.out.write("""<li> > <a href="/vote/%s?type=%s"> ^ </a><a href="%s"><span > id="large">%s</span></a> > <span id='Small'>(%s)</span> > <br /> > %s<br /> <span id='Small'> > %s points %s by %s <a href="/item/%s"></a> | > <a href="/item/%s#disqus_thread"></a> > </span> > </li><br /> """ % > (str(item.key().id()), merchandise_type, item.url, > item.title, urlparse(item.url).netloc, > item.summary, item.points, item.date.strftime("%B %d, > %Y %I:%M%p"), > item.user_who_liked_this_item, str(item.key().id()), > str(item.key().id()))) > > self.response.out.write("</ol>") > #===========regular output===========# > > #===========link to cursor===========# > self.response.out.write("""<a href="/dir?type=%s?cursor= > %s">Next Page</a>""" % (merchandise_type, cursor)) -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
