xhtml error when working with panelGrid

Question

i'm getting an error in xhtml.. the code is:

<h:form>
  <h:panelGrid columns="2">
    <h:outputLabel value="Name:" />
    <h:inputText value="#{newAuctionWizard.auction.name}" />

    <h:outputLabel value="Description:" />
    <h:inputTextarea value="#{newAuctionWizard.auction.description}" />

    <p:outputLabel for="category" value="Categories from which to pick:" />
    <p:selectOneRadio id="category" value="#{newAuctionWizard.auction.category}"  
     layout="grid" columns="3">
      <f:selectItems value="#{newAuctionWizard.auction.categories}" 
       var="c" itemLabel="#{category}" itemValue="#{category}"/>
    </p:selectOneRadio>

    <h:commandButton value="Cancel" action="#{newAuctionWizard.cancel()}" />    
    <h:commandButton value="Details" action="newAuctionDetails" />  
  </h:panelGrid>

the error appeared after including this section:

 <p:outputLabel for="category" value="Categories from which to pick:" />
   <p:selectOneRadio id="category" value="#{newAuctionWizard.auction.category}"  
   layout="grid" columns="3">
     <f:selectItems value="#{newAuctionWizard.auction.categories}" var="c"
      itemLabel="#{category}" itemValue="#{category}"/>
   </p:selectOneRadio>

i've added the namespace for p element but still cannot include it in the panelGrid.. can someone tell me what i am doing wrong ? the error is:

2017-02-07 14:52:12,275 ERROR [org.jboss.as.controller.management-operation] (DeploymentScanner-threads - 2) WFLYCTL0013: Operation ("deploy") failed - address: ([("deployment" => "auctioner-0.0.1-SNAPSHOT.war")]) - failure description: {"WFLYCTL0080: Failed services" => {"jboss.persistenceunit.\"auctioner-0.0.1-SNAPSHOT.war#auctionPersistenceUnit\"" => "org.jboss.msc.service.StartException in service jboss.persistenceunit.\"auctioner-0.0.1-SNAPSHOT.war#auctionPersistenceUnit\": javax.persistence.PersistenceException: [PersistenceUnit: auctionPersistenceUnit] Unable to build Hibernate SessionFactory
Caused by: javax.persistence.PersistenceException: [PersistenceUnit: auctionPersistenceUnit] Unable to build Hibernate SessionFactory
Caused by: org.hibernate.MappingException: Could not determine type for: java.util.List, at table: AUCTION, for columns: [org.hibernate.mapping.Column(categories)]"}}

Answer 1

According to your question the error appears when you try to add selectOneRadio, you are using c as var and then you put category as itemLabel, and that is wrong, var is used to reference the object you are showing in f:selectItems, so to define the labels you have to use var, something like this :

itemLabel="#{c}"
itemValue="#{c}"

and value should be a list of categories you define, and fill it in the managedBean :

value="#{newAuctionWizard.categories}"

check primefaces : http://www.primefaces.org/showcase/ui/input/oneRadio.xhtml