Then if I delete a object, the numerical index will be broken..How to do
efficient paging?
On Wed, Jan 28, 2009 at 8:08 AM, Marzia Niccolai <ma...@google.com> wrote:
>
> Hi,
>
> The efficient method for paging only generates a 'next' and a 'back'
> link when used as written.
>
> For numbered pagination, you will need to maintain some kind of global
> counter object that would compute the number of pages and the proper
> filtering value for each page you wanted to display.
>
> -Marzia
>
> On Wed, Jan 28, 2009 at 10:40 AM, kang <areyouloo...@gmail.com> wrote:
> > I still do not know how to do paging...I can only get the next link, but
> I
> > can not get the page 2,3,4,5,6,7,8 more link. Wish you can give me more
> > hint. Thanks
> >
> > On Mon, Jan 26, 2009 at 7:32 AM, Marzia Niccolai <ma...@google.com>
> wrote:
> >>
> >> Hi,
> >>
> >> This may not work for your particular use case, but you can use an
> >> equality filter in conjunction with the key filter, so instead of
> >> something like:
> >> suggestions = Suggestion.all().filter('__key__ >=',
> >> bookmark).order("__key__").fetch(PAGESIZE+1)
> >> you could do:
> >> suggestions = Suggestion.all().filter('title =',
> >> VALUE).filter('__key__ >=',
> >> bookmark).order("__key__").fetch(PAGESIZE+1)
> >>
> >> Which would at least allow users to query on a small subset of values
> >> (those that specifically equal a property) and still allow paging on
> >> the results.
> >>
> >> -Marzia
> >>
> >> On Mon, Jan 26, 2009 at 1:02 PM, kang <areyouloo...@gmail.com> wrote:
> >> > Thanks for your reply.
> >> > I've just read the article today and I will have a try. For search
> >> > result, I
> >> > do not know what query users give and how much result. So, I can not
> >> > give a
> >> > index for an instance.
> >> >
> >> > On Mon, Jan 26, 2009 at 6:54 AM, Marzia Niccolai <ma...@google.com>
> >> > wrote:
> >> >>
> >> >> Hi,
> >> >>
> >> >> There are a couple of reliable ways to do paging with App Engine for
> >> >> arbitrarily sized data sets, both of which are discussed in this
> >> >> article:
> >> >> http://code.google.com/appengine/articles/paging.html
> >> >> And the corresponding sample code:
> >> >>
> >> >>
> >> >>
> http://code.google.com/p/google-app-engine-samples/source/browse/#svn/trunk/paging
> >> >>
> >> >> The easiest way is to just use key paging, if key ordering is
> >> >> sufficient for your paging needs.
> >> >>
> >> >> I'm not sure what you mean by not being able index a search result,
> >> >> but with the paging methods described in the article, deleting an
> >> >> entity should not affect the ability to page.
> >> >>
> >> >> -Marzia
> >> >>
> >> >> On Sat, Jan 24, 2009 at 1:02 PM, lookon <areyouloo...@gmail.com>
> wrote:
> >> >> >
> >> >> > I've read the discussion about paging and have post some problems.
> >> >> > But
> >> >> > I still have some problems.
> >> >> >
> >> >> > If I builds index by myself, I cannot index the search result. And
> if
> >> >> > I have built index for an object and delete one instance of an
> >> >> > object,
> >> >> > the index will be broken.
> >> >> >
> >> >> > If I use the GAE Paginator class (http://appengine-
> >> >> > cookbook.appspot.com/recipe/gae-paginator-class/?
> >> >> >
> >> >> >
> >> >> >
> id=ahJhcHBlbmdpbmUtY29va2Jvb2tyjgELEgtSZWNpcGVJbmRleCI4YWhKaGNIQmxibWRwYm1VdFkyOXZhMkp2YjJ0eUZBc1NDRU5oZEdWbmIzSjVJZ1pFYW1GdVoyOE0MCxIGUmVjaXBlIjlhaEpoY0hCbGJtZHBibVV0WTI5dmEySnZiMnR5RkFzU0NFTmhkR1ZuYjNKNUlnWkVhbUZ1WjI4TTcM)
> >> >> >
> >> >> > Then how to deal with the 1000 result limit in GAE? I cannot page
> if
> >> >> > I
> >> >> > have more than 1000 result. I can write my new paging class, but
> wish
> >> >> > you can give me some advice.Thanks.
> >> >> > >
> >> >> >
> >> >>
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Stay hungry,Stay foolish.
> >> >
> >> > >
> >> >
> >>
> >>
> >
> >
> >
> > --
> > Stay hungry,Stay foolish.
> >
> > >
> >
>
> >
>
--
Stay hungry,Stay foolish.
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