Hello everyone, I'm working on my new search page which uses tapestry query parameters. The query parameters are dynamically set from a select menu. So far it seems to be working, however I do not know how to clear the query parameter from the url when the select menu is set to blank. I end up getting a null pointer exception. Below is my code. btw, if anybody sees any room for performance modifications, feel free to comment. This is very new to me. Thanks
<html t:type="layout" xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd"; xmlns:p="tapestry:parameter" pageTitle="Used Cars For Sale in region goes here"> <br/><br/><br/><br/> <t:Form t:id="searchForm"> <t:Select t:id="searchYear" value="vehicleYear" model="yearSearchModel"/> <t:Select t:id="searchMake" value="vehicleMake" model="makeSearchModel"/> <t:Select t:id="searchModel" value="vehicleModel" model="modelSearchModel"/> <t:Submit/> </t:Form> <t:Loop source="vehicles" value="vehicle"> <t:PageLink page="used_car_for_sale" context="vehicle.id">${vehicle.year} ${vehicle.make} ${vehicle.model} ${vehicle.trimLevel}</t:PageLink><br/> </t:Loop> </html> public class UsedCarsForSale { @ActivationRequestParameter(value = "year") private String year; @ActivationRequestParameter(value = "make") private String make; @ActivationRequestParameter(value = "model") private String model; @Property private VehicleYear vehicleYear; @Property private VehicleMake vehicleMake; @Property private VehicleModel vehicleModel; @Inject private YearDAO yearDAO; @Inject private MakeDAO makeDAO; @Inject private ModelDAO modelDAO; @Inject private SelectModelFactory selectModelFactory; @Property private Vehicle vehicle; @Inject private Session session; @Inject private PageRenderLinkSource pageRenderLinkSource; void onPrepareFromSearchForm() { System.out.println(year); if(this.year != null) { this.vehicleYear = this.yearDAO.find(year); } if(this.make != null) { this.vehicleMake = this.makeDAO.find(make); } if(this.model != null) { this.vehicleModel = this.modelDAO.find(model); } } Object onSuccess() { this.year = vehicleYear.getName(); this.make = vehicleMake.getName(); this.model = vehicleModel.getName(); return pageRenderLinkSource.createPageRenderLink(this.getClass()); } public List<Vehicle> getVehicles() { Criteria criteria = this.session.createCriteria(Vehicle.class); criteria.createAlias("vehicleYear", "vehicleYear"); criteria.createAlias("vehicleMake", "vehicleMake"); criteria.createAlias("vehicleModel", "vehicleModel"); if (year != null) { criteria.add(Restrictions.eq("vehicleYear.name", year)); } if (make != null) { criteria.add(Restrictions.eq("vehicleMake.name", make).ignoreCase()); } if (model != null) { criteria.add(Restrictions.eq("vehicleModel.name", model).ignoreCase()); } return criteria.list(); } public SelectModel getYearSearchModel() { return this.selectModelFactory.create(this.yearDAO.findAll(), "name"); } public SelectModel getMakeSearchModel() { return this.selectModelFactory.create(this.makeDAO.findAll(), "name"); } public SelectModel getModelSearchModel() { return this.selectModelFactory.create(this.modelDAO.findAll(), "name"); } } -- View this message in context: http://tapestry.1045711.n5.nabble.com/How-to-remove-query-parmeter-from-url-string-tp5716922.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
