javax.faces.view.facelets.TagAttributeException

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

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

Answer 2

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;
    }
}