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POJSF difficulty with EL expression
 

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  1. POJSF difficulty with EL expression
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    <p>I am facing a problem while using the property "required" JSF 2 + Prime Faces 3.5.</p> <p>The code below works perfectly:</p> <pre><code> &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:p="http://primefaces.org/ui"&gt; &lt;ui:decorate template="/templates/main_template.xhtml"&gt; &lt;ui:define name="centro"&gt; &lt;h:head&gt; &lt;/h:head&gt; &lt;h:body&gt; &lt;f:view&gt; &lt;h:form id="form"&gt; &lt;h3&gt;TITLE&lt;/h3&gt; &lt;h:panelGrid id="panel1" columns="3"&gt; &lt;h:outputLabel for="input1" value="Input1" /&gt; &lt;p:inputText id="input1" value="#{controller.myObject.input1}" label="input1" required="#{empty param['form:input3']}"/&gt; &lt;p:message for="input1" /&gt; &lt;h:outputLabel for="input2" value="Input2" /&gt; &lt;p:inputText id="input2" value="#{controller.myObject.input2}" label="input2" required="#{empty param['form:input3']}"/&gt; &lt;p:message for="input2" /&gt; &lt;h:outputLabel for="input3" value="Input3" /&gt; &lt;p:inputText id="input3" value="#{controller.myObject.input3}" label="input3" required="#{empty param['form:input1']}"/&gt; &lt;p:message for="input3" /&gt; &lt;/h:panelGrid&gt; &lt;p:commandButton id="btn" value="Save" update="form" actionListener="#{controller.save}" /&gt; &lt;/h:form&gt; &lt;/f:view&gt; &lt;/h:body&gt; &lt;/ui:define&gt; &lt;/ui:decorate&gt; &lt;/html&gt; </code></pre> <p>If I add to my code a TAB VIEW, required field validation does not work anymore, as follows:</p> <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:p="http://primefaces.org/ui"&gt; &lt;ui:decorate template="/templates/main_template.xhtml"&gt; &lt;ui:define name="centro"&gt; &lt;h:head&gt; &lt;/h:head&gt; &lt;h:body&gt; &lt;f:view&gt; &lt;h:form id="form"&gt; &lt;h3&gt;#{msgs.clienteCadastroTitulo}&lt;/h3&gt; &lt;p:tabView id="tabView"&gt; &lt;p:tab id="tab1" title="TAB 1"&gt; &lt;h:panelGrid id="panel1" columns="3"&gt; &lt;h:outputLabel for="input1" value="Input1" /&gt; &lt;p:inputText id="input1" value="#{controller.myObject.input1}" label="input1" required="#{empty param['form:input3']}"/&gt; &lt;p:message for="input1" /&gt; &lt;h:outputLabel for="input2" value="Input2" /&gt; &lt;p:inputText id="input2" value="#{controller.myObject.input2}" label="input2" required="#{empty param['form:input3']}"/&gt; &lt;p:message for="input2" /&gt; &lt;h:outputLabel for="input3" value="Input3" /&gt; &lt;p:inputText id="input3" value="#{controller.myObject.input3}" label="input3" required="#{empty param['form:input1']}"/&gt; &lt;p:message for="input3" /&gt; &lt;/h:panelGrid&gt; &lt;/p:tab&gt; &lt;/p:tabView&gt; &lt;p:commandButton id="btn" value="Save" update="form" actionListener="#{controller.save}" /&gt; &lt;/h:form&gt; &lt;/f:view&gt; &lt;/h:body&gt; &lt;/ui:define&gt; &lt;/ui:decorate&gt; &lt;/html&gt; </code></pre> <p>I will not post here everything I've tried, but they can be sure that I've tried using various methods outlined by tutorials, questions from other users, etc..</p> <p>Still I could not understand where I am going wrong and what you would like to give me some tips so I can perform my validation correctly.</p> <p>Basically, my required property should be dynamic according to the fill or not the fields in my form.</p> <p>Thank you all in advance.</p>
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    1. COI don't think you can use required value dynamically like that. You need to check for null values in your `save` method and throw a Validation Exception based on your logic.
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