[jira] [Created] (TAP5-1796) Flash persistence not working after a zone within a form is updated in a parameterized page

[Shing Hing Man (Created) (JIRA)]

Flash persistence not  working after a zone within a form  is updated in a 
parameterized page 
----------------------------------------------------------------------------------------------

                 Key: TAP5-1796
                 URL: https://issues.apache.org/jira/browse/TAP5-1796
             Project: Tapestry 5
          Issue Type: Bug
          Components: tapestry-core
    Affects Versions: 5.3
            Reporter: Shing Hing Man
            Priority: Minor


In Tapestry 5.3, I have a page PageA  which is  a parameterized page of a 
generic base page.
PageA has a form with a zone. Somehow no result is rendered  on the client side 
if the zone is updated, and then follow by a form  submit. 

Attached is a maven project to reproduce  my error.

Steps to reproduce error :  pageA -> choose Audi -> click submit
                                    (then Audi, A4 are displayed on the bottom 
of the page)
                                       --> choose BMW
                                       -- > click submit
                                    This time, make and model are both blank  
at the bottom of the page.                                        
                                     I was expecting BMW and 3 series to be 
displayed.
          
                                   
                                     
public abstract class BasePage<T extends BaseBean>{
    private Logger log = Logger.getLogger(BasePage.class);
        
        @Persist(PersistenceConstants.FLASH)
        private T bean;
        
        @Persist(PersistenceConstants.FLASH)
        @Property
        private boolean showOutput;
        
        
        void onSubmitFromForm(){
                showOutput = true;
        }
        
        public T getBean(){
                 
                if (bean == null){
                    bean = createBean();
                        
                }
                return bean;
        }
        
        
        protected T createBean(){
                T newInstance = null;
                
                    try {
                        Class<T> clazz = getBeanClass();
                                newInstance =clazz.newInstance();
                        } catch (InstantiationException e) {
                                log.info(e);
                                
                        } catch (IllegalAccessException e) {
                                log.info(e);
                        }
                
            return newInstance;
        }
        
        
        protected abstract Class<T> getBeanClass();
}

------------




public class PageA extends BasePage<PageABean> {

        @InjectComponent
        private Zone modelZone;

        @Property
        @Persist
        private List<String> availableModels;

        
        public Object onValueChanged(CarMaker maker) 
    {
       availableModels = findAvailableModels(maker);
       
       return modelZone.getBody();
    }
    
    public List<String> findAvailableModels(final CarMaker maker) 
    {
      switch (maker) 
      {
         case AUDI:
            return Arrays.asList("A4", "A6", "A8");
         case BMW:
            return Arrays.asList("3 Series", "5 Series", "7 Series");
         case MERCEDES:
            return Arrays.asList("C-Class", "E-Class", "S-Class");
         default:
            return Arrays.asList();
       }
    }
    
    
        @Override
        protected Class<PageABean> getBeanClass() {
                return PageABean.class;
        }

        
}

----------------
PageA.tml



     <t:form>
      <p>
         <t:errors />
      </p>
      <p>
         Car Marker : <t:select t:id="carMaker" validate="required" 
value="bean.carMaker"
                   zone="modelZone" />
      </p>
      
      <t:zone t:id="modelZone" id="modelZone">
         <t:if test="bean.carMaker">
           <p>
              Model : <t:select t:id="carModel" model="availableModels" 
validate="required" value="bean.model"/>
           </p>
         </t:if>
      </t:zone>
      
      <p>
         <t:submit value="literal:Submit" />
      </p>
   </t:form>
     
     <t:if test="showOutput">
           Make = ${bean.carMaker} <br/>
           model = ${bean.model}
 
     </t:if>
    </body>

----------------
public class PageABean extends BaseBean {

        public enum CarMaker {
                MERCEDES, AUDI, BMW;
        }
        
        
        private CarMaker carMaker;
        
        private String model;

        
        public String getModel() {              
                return model;
        }

        public void setModel(String model) {
                this.model = model;
        }

        public CarMaker getCarMaker() {
                return carMaker;
        }

        public void setCarMaker(CarMaker carMaker) {
                this.carMaker = carMaker;
        }

}

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