In onDeactivate(Long serviceID), get the service! Tapestry is trying to render the row so it can send it back in the response - so it needs the service.
Cheers, Geoff On 01/12/2012, at 4:01 AM, Pillar wrote: > Hey! Always more questions! > > I'm following this example: Ajax EventLinks in a Loop > <http://jumpstart.doublenegative.com.au/jumpstart/examples/ajax/eventlinksinaloop> > > . I've modified some code to fit my use case. I have a table that uses a > t:loop to iterate through services and show if they are activated. I then > have eventlinks to activate/deactivate services. My server code writes to a > database based on the eventlink clicked. Here are parts of the code (dunno > how to post html): > > <t:loop t:source = "services" t:value = "service"> > <(tr) t:type = "Zone" t:id = "rowZone" id = "currentRowZoneId" t:update = > "show"> > <(td)>${service.name}<(/td)> > <(a) t:type = "eventlink" t:event = "deactivate" t:context = > "service.serviceID" t:zone = "^" href = "#">Deactivate<(/a)> > > My java: > > private List<Service> services; > > @InjectComponent > private Zone rowZone; > > @Inject > private Request request; > > @Inject > private AjaxResponseRenderer ajaxResponseRenderer; > > @Property > private Service service; > > void setupRender() { > services = getServices(); > } > > public boolean getIsActivated() { > User u = getUser(); > for (UserService us : u.getUserServices()) { > if (us.getService().getServiceID() == > service.getServiceID()) > return true; > } > return false; > } > > public List<Service> getServices() { > if (services == null) { > services = serviceDao.findAll(); > } > return services; > } > > public void onDeactivate(Long serviceID) { > UserService us = > userServiceDao.findByUserIdAndServiceId(currentUserID, > serviceID); > userServiceDao.delete(us.getUserserviceID()); > > if (request.isXHR()) { > ajaxResponseRenderer.addRender(rowZone); > } > } > > public String getCurrentRowZoneId() { > return "rowZone_" + service.getServiceID(); > } > > So when the eventlink is clicked, the onDeactivate() method gets called with > serviceID as context. This removes the userservice from the db and calls > addRender() on the rowZone. I immediately get this error: > > Render queue error in Expansion[PropBinding[expansion > service/ActivationAjax(service.name)]]: Property 'service' (within property > expression 'service.name', of > org.synchronica.example.pages.service.ServiceActivationAjax@53e1b8fb) is > null. > > Since ajax is only making the specific row to update, we aren't looping > again so how does it know which service (thus NPE)? In the tutorial I posted > above, it works fine. Any ideas? > > > > -- > View this message in context: > http://tapestry.1045711.n5.nabble.com/AJAX-updating-table-row-tp5718433.html > Sent from the Tapestry - User mailing list archive at Nabble.com. > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org For additional commands, e-mail: users-h...@tapestry.apache.org
