[jboss-user] [JBoss Seam] - Re: OneToMany List refresh after insert

[damianharvey]

I've recreated this with a simple example using Seam Gen. If you have a PERSON entity and a CITY entity. Then you wish to show a list of CITYs with a column holding a ui:repeat (or similar) displaying all associated PERSONs. The cause of the problem is that this is an "all-in-one" type page where the form to add the record is on the same page as the table to display. I suspect that something is needed to force the refresh.

The page:

  | <!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  | 							 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  | 
  | <ui:composition xmlns="http://www.w3.org/1999/xhtml"
  | 				xmlns:s="http://jboss.com/products/seam/taglib"
  | 				xmlns:ui="http://java.sun.com/jsf/facelets"
  | 				xmlns:f="http://java.sun.com/jsf/core"
  | 				xmlns:h="http://java.sun.com/jsf/html"
  | 				xmlns:a="https://ajax4jsf.dev.java.net/ajax"
  | 				xmlns:rich="http://richfaces.ajax4jsf.org/rich"
  | 				template="layout/template.xhtml">
  | <ui:define name="body">
  | 	<h:messages globalOnly="true" styleClass="message" id="globalMessages"/>
  | 	<h:form id="person" styleClass="edit">
  | 		<rich:panel>
  | 			<f:facet name="header">Create Person</f:facet>
  | 			<s:decorate id="firstnameDecoration" template="layout/edit.xhtml">
  | 				<ui:define name="label">Firstname</ui:define>
  | 				<h:inputText id="firstname" value="#{personHome.instance.firstname}"/>
  | 			</s:decorate>
  | 			<s:decorate id="surnameDecoration" template="layout/edit.xhtml">
  | 				<ui:define name="label">Surname</ui:define>
  | 				<h:inputText id="surname" value="#{personHome.instance.surname}"/>
  | 			</s:decorate>
  | 			<s:decorate id="cityDecoration" template="layout/edit.xhtml">
  | 				<ui:define name="label">City</ui:define>
  | 				<h:selectOneMenu id="city" value="#{personHome.instance.city}" style="width:250px;">
  | 					 <s:selectItems value="#{cityList.resultList}" var="city" 
  | 					 	noSelectionLabel="Please Select..." label="#{city.cityname}"/>
  | 					 <s:convertEntity />
  | 				</h:selectOneMenu>
  | 			</s:decorate>
  | 			<div style="clear:both">
  | 				<span class="required">*</span>
  | 				required fields
  | 			</div>
  | 		</rich:panel>
  | 		<div class="actionButtons">
  | 			<h:commandButton id="save" value="Save"
  | 				action="#{personHome.persist}" rendered="#{!personHome.managed}"/>
  | 		</div>
  | 	</h:form>
  |    	<rich:dataTable var="city" value="#{cityList.resultList}"
  | 		rowClasses="rvgRowOne,rvgRowTwo" id="cityTable">
  | 		<h:column>
  | 			<f:facet name="header">City</f:facet>
  | 			#{city.cityname}
  | 		</h:column>
  | 		<h:column>
  | 			<f:facet name="header">people</f:facet>
  | 			<ui:repeat var="person" value="#{city.persons}">
  | 				<h:outputText value="#{person.firstname} #{person.surname}"/>
  | 				<br/>
  | 			</ui:repeat>
  | 		</h:column>
  | 	</rich:dataTable>
  | </ui:define>
  | </ui:composition>
  | 
The page has no pages.xml entries or associated page.xml file. The persist action returns to the current page. I would have thought that as the dataTable is re-rendered, that the List of Persons would be refreshed; however it isn't.

And I have changed the PersonHome object from what Seam generated to remove the PersonHome from the conversation so that the same page can be reused:

  | package com.seamtest;
  | 
  | import org.jboss.seam.annotations.In;
  | import org.jboss.seam.annotations.Name;
  | import org.jboss.seam.annotations.Transactional;
  | import org.jboss.seam.contexts.Contexts;
  | import org.jboss.seam.framework.EntityHome;
  | 
  | @Name("personHome")
  | public class PersonHome extends EntityHome<Person> {
  | 
  | 	public void setPersonPersonid(Long id) {
  | 		setId(id);
  | 	}
  | 
  | 	public Long getPersonPersonid() {
  | 		return (Long) getId();
  | 	}
  | 
  | 	@Override
  | 	protected Person createInstance() {
  | 		Person person = new Person();
  | 		return person;
  | 	}
  | 
  | 	public Person getDefinedInstance() {
  | 		return isIdDefined() ? getInstance() : null;
  | 	}
  | 
  | 	@Override
  | 	@Transactional
  | 	public String persist() {
  | 		String status = super.persist();
  | 		Contexts.removeFromAllContexts("personHome");
  | 		return status;
  | 	}
  | 
  | }
  | 

The Person entity is unchanged from Seam-Gen. It contains only firstname, surname and City. I have changed the City entity to store a java.util.List of Persons rather than a set:

  | package com.seamtest;
  | // Generated Apr 16, 2007 6:03:07 PM by Hibernate Tools 3.2.0.b9
  | 
  | import java.util.ArrayList;
  | import java.util.List;
  | 
  | import javax.persistence.CascadeType;
  | import javax.persistence.Column;
  | import javax.persistence.Entity;
  | import javax.persistence.FetchType;
  | import javax.persistence.Id;
  | import javax.persistence.JoinColumn;
  | import javax.persistence.ManyToOne;
  | import javax.persistence.OneToMany;
  | import javax.persistence.Table;
  | 
  | import org.hibernate.validator.NotNull;
  | 
  | /**
  |  * City generated by hbm2java
  |  */
  | @Entity
  | @Table(name = "CITY", catalog = "SEAMTEST")
  | public class City implements java.io.Serializable {
  | 
  | 	private long cityid;
  | 	private String cityname;
  | //	private Set<Person> persons = new HashSet<Person>(0);
  | 	private List<Person> persons = new ArrayList<Person>(0);
  | 
  | 	public City() {
  | 	}
  | 
  | 	public City(long cityid) {
  | 		this.cityid = cityid;
  | 	}
  | 	public City(long cityid, String cityname,
  | 			List<Person> persons) {
  | 		this.cityid = cityid;
  | 		this.cityname = cityname;
  | 		this.persons = persons;
  | 	}
  | 
  | 	@Id
  | 	@Column(name = "CITYID", unique = true, nullable = false)
  | 	@NotNull
  | 	public long getCityid() {
  | 		return this.cityid;
  | 	}
  | 
  | 	public void setCityid(long cityid) {
  | 		this.cityid = cityid;
  | 	}
  | 
  | 	@Column(name = "CITYNAME")
  | 	public String getCityname() {
  | 		return this.cityname;
  | 	}
  | 
  | 	public void setCityname(String cityname) {
  | 		this.cityname = cityname;
  | 	}
  | 	@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "city")
  | 	public List<Person> getPersons() {
  | 		return this.persons;
  | 	}
  | 
  | 	public void setPersons(List<Person> persons) {
  | 		this.persons = persons;
  | 	}
  | 
  | }
  | 
  | 
Happy to email a stripped down project if it would help.

Thanks,

Damian.

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