Entities Get Updated--Screen Doesn't (Usually)
I'm having a strange problem where particular entity changes are not (usually) being reflected on my screens. I start with a vanilla seam-gen application that generates these artifacts:
DepartmentList.xhtml (main application screen)
DepartmentList.page.xml
ProjectList.xhmtl (List of Projects)
ProjectList.page.xhtml
Department.java (@Entity)
DepartmentList.java (extends EntityQuery)
DeparmentHome (extends EntityHome)
Project.java (@Entity)
ProjectList.java (extends EntityQuery)
ProjectHome (extends EntityHome)
Easiest way to show you where I'm going is to look at a picture of part of the DepartmentList screen: http://sawdust.50webs.com/images/spurs_display.jpg
(No comments on the artwork please--I'm a server-side guy! I'll let the UI pros do what they do best.)
You'll see departments with a sub-listing of projects for ea. dept.
You see the "tape recorder" buttons? They change the status on Projects (update the entity). When I push these buttons the Project entities actually are correctly persisted to the database but no changes appear on the DisplayList screen. :-( Reloading the screen or visiting most other screens has no effect--the db and the screen are still out-of-sync.
Here's the weird part: If I first go to the ProjectList.xhtml screen (not touching anything there--just let it render) then immediately go back to DepartmentList.xhtml then click on a tape-recorder button for one click only the on-screen status changes immediately as desired. Subsequent clicks continue to change the persisted Project status but no screen changes occur unless I again visit ProjectList.xhtml. Huh?
This is hard to diagnose w/o seeing all the code, but I didn't want to dump reams of useless code into the forum. I'll post a chunk of ProjectList.xhtml since there seems to be some "magic" in simply visiting this page. If other files would be helpful let me know and I'll post them.
When I click a tape-recorder button in DepartmentList.xhtml (<s:link> w/image) I pass the ProjectId as a <f:param>. A stateful session bean does an em.find() on the ProjectId to get the Project entity, simply calls proj.setStatus() and we're done. Nothing fancy. Somewhere, somehow--something in the UI is still holding onto a copy of the previous Project object.
Thanks in advance for any advice/clues!
Greg
ProjectList.xhtml
<!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"
template="layout/template.xhtml">
<ui:define name="body">
<h:messages globalOnly="true" styleClass="message" id="globalMessages"/>
<div class="results" id="projectList">
<h3>Projects</h3>
<h:outputText value="No project exists"
rendered="#{empty projectList.resultList}"/>
<h:dataTable id="projectList"
var="project"
value="#{projectList.resultList}"
rendered="#{not empty projectList.resultList}">
<h:column>
<f:facet name="header">
<s:link styleClass="columnHeader"
value="projectId #{projectList.order=='projectId asc' ? messages.down : ( projectList.order=='projectId desc' ? messages.up : '' )}">
<f:param name="order" value="#{projectList.order=='projectId asc' ? 'projectId desc' : 'projectId asc'}"/>
</s:link>
</f:facet>
#{project.projectId}
</h:column>
<h:column>
<f:facet name="header">
<s:link styleClass="columnHeader"
value="version #{projectList.order=='version asc' ? messages.down : ( projectList.order=='version desc' ? messages.up : '' )}">
<f:param name="order" value="#{projectList.order=='version asc' ? 'version desc' : 'version asc'}"/>
</s:link>
</f:facet>
#{project.version}
</h:column>
<h:column>
<f:facet name="header">
<s:link styleClass="columnHeader"
value="department deptId #{projectList.order=='department.deptId asc' ? messages.down : ( projectList.order=='department.deptId desc' ? messages.up : '' )}">
<f:param name="order" value="#{projectList.order=='department.deptId asc' ? 'department.deptId desc' : 'department.deptId asc'}"/>
</s:link>
</f:facet>
#{project.department.deptId}
</h:column>
<!-- CLIP! Lots more like this to draw out the rest of Project's fields -->
</h:dataTable>
</div>
<div class="tableControl">
<s:link view="/ProjectList.xhtml"
rendered="#{projectList.previousExists}"
value="#{messages.left}#{messages.left} First Page"
id="firstPage">
<f:param name="firstResult" value="0"/>
</s:link>
<s:link view="/ProjectList.xhtml"
rendered="#{projectList.previousExists}"
value="#{messages.left} Previous Page"
id="previousPage">
<f:param name="firstResult"
value="#{projectList.previousFirstResult}"/>
</s:link>
<s:link view="/ProjectList.xhtml"
rendered="#{projectList.nextExists}"
value="Next Page #{messages.right}"
id="nextPage">
<f:param name="firstResult"
value="#{projectList.nextFirstResult}"/>
</s:link>
<s:link view="/ProjectList.xhtml"
rendered="#{projectList.nextExists}"
value="Last Page #{messages.right}#{messages.right}"
id="lastPage">
<f:param name="firstResult"
value="#{projectList.lastFirstResult}"/>
</s:link>
</div>
<s:div styleClass="actionButtons" rendered="#{empty from}">
<s:button view="/ProjectEdit.xhtml"
id="create"
value="Create project">
<f:param name="projectProjectId"/>
</s:button>
</s:div>
</ui:define>
</ui:composition>