HI,
I somehow have the feeling that for pagination, cursors,
memcache and task queues can be used. But I can't get my head around
to get the exact code. Any experts here who can help?
The idea is like this ..
First time the query runs do something like this
q=Something.all()
q.filter
.... and so on ...
total_results=q.count()
q.limit(20) # say,
current_results=q.count() # what if it only returned 15 at the end ?
self.response.out.write(" Showing " + str(current_results) + " of "
+str(total_results))
Add a task with current query as parameter(somehow, may be get some
kind of unique id for it or something) . The task should generate all
(or a set of next N*5) cursors ready in a memcached list(may be comma
seperated row)
The next time the cgi runs it should first check if there is a
memcached list of cursors for the current and next (and may be
previous) N set of pages .. if not , call the task again to generate
it. If it was existing , use the cursors from the memcached list.
the task could do something like this :
q=soemthing.all()
if cursor:
q.with_cursor(cursor)
q.limit(20)
next_cursor=q.cursor()
add the cursor to cache with unique session/query id
rinse, repeat till satisfied.
what say?
I know there are a bunch of errors in the code above .. Its just to
give an idea.
if cursor:
q.with_cursor(cursor)
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