This one drives me crazy! If there's a list box backed by an EntityQuery, on
the same page with an AJAX component (in my case it's RichFaces
DataScroller/DataTable), then after several AJAX requests, the resultList for
EntityQuery contains a list of nulls. It looks like every entity in the
resultList is replaced with a null. I'm not sure whether it's Seam or
RichFaces, but it's bound to be one or the other.
Anyway, here's the setup: Seam 2 GA, RichFaces 3.1.2, Facelets 1.1.14, JSF RI
1.2.05, Hibernate 3.2.5 GA.
The entites A and B are identical in structure (though they can be different,
for as much as this bug cares):
@Entity
| public class A implements Serializable {
| @Id
| private String name;
|
| public String getName() {
| return name;
| }
| }
The EntityQuery's:
<core:init debug="false" />
| <core:manager conversation-timeout="120000"
concurrent-request-timeout="500" />
| <persistence:entity-manager-factory name="testDatabase" />
| <persistence:managed-persistence-context name="entityManager"
| entity-manager-factory="#{testDatabase}" auto-create="true" />
| <transaction:entity-transaction entity-manager="#{entityManager}" />
| <framework:entity-query name="listOfA" scope="conversation" ejbql="FROM
A a" order="name" />
| <framework:entity-query name="listOfB" scope="conversation" ejbql="FROM
B b" order="name" />
| <security:identity authenticate-method="#{authenticator.authenticate}"
/>
| <web:ajax4jsf-filter force-parser="false" enable-cache="true"
class="org.ajax4jsf.FastFilter" />
Now, the Facelets page:
<h:form xmlns="http://www.w3.org/1999/xhtml";
| xmlns:h="http://java.sun.com/jsf/html";
xmlns:f="http://java.sun.com/jsf/core";
| xmlns:s="http://jboss.com/products/seam/taglib";
xmlns:r="http://richfaces.org/rich";>
| <r:dataTable id="list" var="a" value="#{listOfA.resultList}" rows="4">
| <r:column>
| <h:commandLink action="Dummy" value="#{a.name}" />
| </r:column>
| </r:dataTable>
| <r:datascroller align="left" maxPages="1" for="list"
fastControls="auto" />
| <br />
| <h:selectOneMenu value="#{notImportantHere}">
| <s:selectItems value="#{listOfB.resultList}" var="b"
label="#{b.name}" noSelectionLabel="Select one..." />
| <s:convertEntity />
| </h:selectOneMenu>
| </h:form>
Pretty simple - there's a scrollable datatable for entity A, and a dropdown for
entity B. Now, when user activates the datascroller twice, and then selects an
A from the data table, the list of Bs is empty - it contains the same # of
entries as before, but they are all empty.
Has anyone ever encountered such behavior before? Is this a bug? I myself have
seen it before, with a different AJAX component (it was a RichFaces suggestion
box that time), but dismissed it on the notion that "what else could you expect
from a beta" (Seam was B2 at the time)?
Thanks in advance,
Alex
View the original post :
http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4102676#4102676
Reply to the post :
http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4102676
_______________________________________________
jboss-user mailing list
[email protected]
https://lists.jboss.org/mailman/listinfo/jboss-user
