Thanks for the help. Much appreciated. On Sep 20, 10:29 am, "Ikai Lan (Google)" <ikai.l+gro...@google.com> wrote: > Yes, storing the cursor locally would be how you do it. If you weren't using > GWT, you'd be rendering a link to the next page with the start cursor in the > body of the HTML document, which would be functionally equivalent. If you > used ranges and offsets, you'd have to store page state anyway client side. > > > > On Sun, Sep 19, 2010 at 8:38 AM, Rick Horowitz <rickh...@gmail.com> wrote: > > I'm using a GWT UI. Is the recommended best practice to cache already > > received results in the client, and track the currently displayed page > > in the client, thus allowing to use the cached results when the user > > is displaying a page already retrieved from the server and going to > > the server only when the user pages forward? > > > On Sep 17, 9:39 pm, Robert Kluin <robert.kl...@gmail.com> wrote: > > > The cursor works sort of like a like a pointer, or a bookmark, in the > > > index. When you run the query it advances the pointer forwards. It > > > does not simply operate via offsets on the result set. Looks like the > > > range specifies how many records you want back, i.e. how far you want > > > it to advance the cursor. > > > > The current implementation of cursors do not allow you to run > > > backwards. There was talk about cursors supporting that feature, but > > > I have not heard about it six Google IO. > > > > Robert > > > > On Fri, Sep 17, 2010 at 16:57, Rick Horowitz <rickh...@gmail.com> wrote: > > > > I'm finding the JDO cursor usage documentation a bit confusing. > > > > According to the docs athttp:// > > code.google.com/appengine/docs/java/datastore/queriesandindexe... > > > > > To get the initial page of results: > > > > > query.setRange(0, 20); // which makes sense > > > > > Then to get the second page of results, it again uses: > > > > > query.setRange(0, 20); // which is confusing. Shouldn't it be > > > > query.setRange(20, 40) ? > > > > > In addition, does the cursor allow one to specify the previous page to > > > > enable support for a "Previous Page" button in the user interface? > > > > > Thanks. Any clarification would be very much appreciated. > > > > > Rick > > > > > -- > > > > 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<google-appengine%2Bunsubscrib > > e...@googlegroups.com> > > . > > > > For more options, visit this group athttp:// > > groups.google.com/group/google-appengine?hl=en. > > > -- > > 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-appeng...@googlegroups.com. > > To unsubscribe from this group, send email to > > google-appengine+unsubscr...@googlegroups.com<google-appengine%2Bunsubscrib > > e...@googlegroups.com> > > . > > For more options, visit this group at > >http://groups.google.com/group/google-appengine?hl=en.
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