Hi all:
Am working through the second of the JSF for nonbelievers article and have
found a weird error while constructing one of my jsps. I have two links
for sorting by descending and ascending items in a table. It seems like
the first link works great, but the second link always gives me a
"Duplicate component ID" error.
When links are arranged with "D" first and "A" second:
1. Click on "D" multiple times: Works good - sorts the list in descending
order and brings back view fine.
2. Click on "A". Get: javax.servlet.ServletException:
javax.servlet.jsp.JspException: Duplicate component ID
'_id0:items:descendingtitleId' found in view.
When links are arranged with "A" first and "D" next, the mirror image
happens:
1. Click on A multiple times: Works good - sorts the list in ascending
order and brings back view fine.
2. Click on "D": Get javax.servlet.jsp.JspException: Duplicate component
ID '_id0:items:ascendingtitleId' found in view.
code in jsp is:
<h:form>
<h:dataTable id="items" value="#{CDManagerBean.cds}" var=
"cd"
rowClasses="oddRow, evenRow" headerClass=
"tableHeader">
<h:column id="aColumn">
<f:facet name="header">
<h:panelGroup id="aPanelGroupId">
<h:outputText value=
"Title" id="anOutputText"/>
<f:verbatim>
</f:verbatim>
<f:subview id=
"ascendingtitleId">
<h:commandLink
action="#{CDManagerBean.sortTitleAsc}" id="sortAscCommandId">
<
h:outputText id="ascTitle" value="Asc" />
</h:commandLink>
</f:subview>
<f:verbatim> </
f:verbatim>
<f:subview id=
"descendingtitleId">
<h:commandLink
action="#{CDManagerBean.sortTitleDec}" id="sortDescCommandId">
<
h:outputText id="somedescendingTitleId" value="Dsc" />
</h:commandLink>
</f:subview>
</h:panelGroup>
</f:facet>
I have googled and found this:
http://www.jsf-faq.com/faqs/faces-exception.html#104 and also
http://forum.java.sun.com/thread.jspa?threadID=524925&tstart=0.
The advice I have got from teh baove links is that I need to give
different Ids to my components and that I should be careful while "mixing"
JSF and "<c: tags. Also to put links within <f:subview> tags. Well, I dont
have any <c: tags at all and I have id-ed every compnent in sight and
placed the links within the <f:subview> but have had no luck. Restarted
the server, changed the order of clicking the links and no matter - the
link which is *visually* second causes trouble but the first one works
just fine. Does exactly the same thing in both Firefox and IE.
Any help will be most gratefully accepted!
Geeta
