javax.faces.view.facelets.TagAttributeException - jsf

Question

I'm creating a small application using JSF,facing the exception, below is the code for the form.
<h:form>
<h:selectManyCheckbox value="#{transferMB.selectedItems}">
<f:selectItem itemValue="1" itemLabel="Transfer Status" />
<p:ajax update=":transForm" />
</h:selectManyCheckbox>
</h:form>
exception " javax.faces.view.facelets.TagAttributeException:"

Answer 1

This is a follow-up for issue while loading data
As mentioned there, you need to use EL 2.2 for passing parameter inside EL-Expressions. Seems you don't use that.
So we need another way to get this solved:
<h:form id="transForm">
<p:panelGrid columns="1" rendered="#{transferMB.transFormEnabled}">
<h:outputText value="transForm"/>
</p:panelGrid>
</h:form>
<h:form id="spreadForm">
<p:panelGrid columns="1" rendered="#{transferMB.spreadFormEnabled}">
<h:outputText value="spreadForm"/>
</p:panelGrid>
</h:form>
and in your corresponding bean:
public boolean isTransFormEnabled() {
if (selectedItems.contains("1")) {
return true;
} else {
return false;
}
}
public boolean isSpreadFormEnabled() {
if (selectedItems.contains("2")) {
return true;
} else {
return false;
}
}

Answer 2

You should be calling Boolean-like values into your rendered attributes.
Example:
<p:panelGroup id="group" rendered="{#bean.isOneSelected}">
...
</p:panelGroup>
<p:panelGroup id="group" rendered="{#bean.isTwoSelected}">
...
</p:panelGroup>
And for getting values from selectManyMenu. Please check here.
Also the rendered tag is a Boolean like condition to tell whether a tag should be displayed. You shouldn't need to pass a parameter into that. You should be getting that information from you transferMB