6 Replies Latest reply on Feb 15, 2007 11:05 AM by gavin.king

Please Help (multiple row operations in a data table)

ask4saif Feb 13, 2007 8:23 AM

Dear fellows,

the problem is i want to perform multiple row deletion in a datatable. here is my code, it is the exact copy of the code given in the dvd example.

<h:dataTable id="hotelslist" rows="5" value="#{allHotelsList}" var="hotels" styleClass="scrollerTable" headerClass="standardTable_Header" footerClass="standardTable_Header" columnClasses="column_style,column_style,columna_style1" >
<h:column>
 <f:facet name="header">
 <h:outputText value="Select" />
 </f:facet>
 <h:selectBooleanCheckbox value="#{hotelSelections[hotels]}" />
</h:column>

<h:column>
 <f:facet name="header">
 <h:outputText value="Name"/>
 </f:facet>
 <h:outputText value="#{hotels.name}"/>
</h:column>

<h:column>
 <f:facet name="header">
 <h:outputText value="City"/>
 </f:facet>
 <h:outputText value="#{hotels.city}"/>
</h:column>

<h:column>
 <f:facet name="header">
 <h:outputText value="Contact Number"/>
 </f:facet>
 <h:outputText value="#{hotels.phone}"/>
</h:column>

<h:column>
 <f:facet name="header">
 <h:outputText value="Action" />
 </f:facet>
 <h:commandButton value="Details" action="#{HotelsAction.showHotelDetails}" image="../images/details.gif" />

</h:dataTable>


<h:commandButton action="#{ERegHotelsAction.deleteAll}" value="DeleteAll"/>

In the above mentioned code, whenever i press any command button the associated action is not called by the component and the same page is redisplayed.

and if i remove the "[hotels]" EL exp from the checkbox value then it start working. I dont know what is going on, and what is the exact problem.

can anyone help me on this matter.

thanks alot in advance

1. Re: Please Help (multiple row operations in a data table)

ask4saif Feb 13, 2007 9:07 AM (in response to ask4saif)

any body help!
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2. Re: Please Help (multiple row operations in a data table)

gavin.king Feb 13, 2007 10:04 AM (in response to ask4saif)

If you want help, you need to show more code than that.

(1) The rest of the page, including the h:form element
(2) The Seam component you are trying to call
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3. Re: Please Help (multiple row operations in a data table)

ask4saif Feb 14, 2007 1:02 AM (in response to ask4saif)

Thanx gavin for your reply, its very nice to see you helping all the people. thank you very much.

here is the code:

public class SecretQuestionsAction implements SecretQuestionsLocal{


 @PersistenceContext(unitName="Database")
 protected EntityManager em;

 @In(required=false,value="SecretQuestions")
 @Out(required=false,value="SecretQuestions")
 private SecretQuestions secretQuestions;

 @DataModel
 private List <SecretQuestions> allSecretQuestionsList;

 @DataModelSelection(value="allSecretQuestionsList")
 private SecretQuestions selectedSecretQuestion;

 @In
 private Context sessionContext;

 @In(create=true)
 FacesMessages facesMessages;

 String acknowledge = null;

 @Out(scope=ScopeType.CONVERSATION,required=false)
 Map<SecretQuestions, Boolean> secQuestionSelections;


 /*--------------------------------------------------------------------*/
 public String deleteSelection(){
 System.out.println("In the delete selection method.");
 for (SecretQuestions item: allSecretQuestionsList) {
 Boolean selected = secQuestionSelections.get(item);
 if (selected!=null && selected) {
 secQuestionSelections.put(item, false);
 System.out.println(item.toString());
 // delete(item);

 }
 }

 return null;
 }
 /*--------------------------------------------------------------------*/

This was the method i want to call from my xhtml page. And now this is the jsf code in my xhtml page.


<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
 xmlns:s="http://jboss.com/products/seam/taglib"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 xmlns:c="http://java.sun.com/jstl/core"
 xmlns:t="http://myfaces.apache.org/tomahawk" >
<html>
<head>
 <title>:: Secret Questions List </title>
/>

</head>
<body>
 <f:view>
 <ui:include src="../menus/setupmenu.xhtml"/>

 <f:subview id="allSecretQuestionsList" rendered="#{!empty(allSecretQuestionsList)}">

<table align="center">
 <tr>
 <td align="center">
 <f:verbatim>
 <p><h4>Secret Questions List</h4></p>
 </f:verbatim>
 </td>
 </tr>
 <tr>
 <td align="center">
 <h:form>
 <h:dataTable id="secquestionslist" rows="5" value="#{allSecretQuestionsList}" var="SecretQuestions" >
 <h:column>
 <f:facet name="header">
 <h:outputText value="Select" />
 </f:facet>
 <h:selectBooleanCheckbox value="#{secQuestionSelections[SecretQuestions]}"/>
 </h:column>

 <h:column>
 <f:facet name="header">
 <h:outputText value="Question"/>
 </f:facet>
 <h:outputText value="#{SecretQuestions.secretQuestion}"/>
 </h:column>

 <h:column>
 <f:facet name="header">
 <h:outputText value="Action" />
 </f:facet>
 <h:commandButton value="Details" action="#{SecretQuestionsAction.showSecretQuestionDetails}"
 <c:if test="${CustomerLoginAction.update}">
 <h:commandButton value="Update" action="#{SecretQuestionsAction.loadSecretQuestion}"
 </c:if>

 </h:column>
 </h:dataTable>

 <h:commandButton action="#{SecretQuestionsAction.deleteSelection}" value="Delete Selected"/>

 <h:panelGrid columns="1" align="center">
 <t:dataScroller id="scroll_1"
 for="secquestionslist"
 fastStep="5"
 pageCountVar="pageCount"
 pageIndexVar="pageIndex"
 styleClass="scroller"
 paginator="true"
 paginatorMaxPages="5"
 paginatorTableClass="paginator"
 paginatorActiveColumnStyle="font-weight:bold;"
 immediate="true" >
 <f:facet name="first" >
 <t:graphicImage url="../images/arrow-first.gif" border="1" />
 </f:facet>
 <f:facet name="last">
 <t:graphicImage url="../images/arrow-last.gif" border="1" />
 </f:facet>
 <f:facet name="previous" >
 <t:graphicImage url="../images/arrow-previous.gif" border="1" />
 </f:facet>
 <f:facet name="next">
 <t:graphicImage url="../images/arrow-next.gif" border="1" />
 </f:facet>
 <f:facet name="fastforward">
 <t:graphicImage url="../images/arrow-ff.gif" border="1" />
 </f:facet>
 <f:facet name="fastrewind">
 <t:graphicImage url="../images/arrow-fr.gif" border="1" />
 </f:facet>
 </t:dataScroller>
 </h:panelGrid>
 </h:form>
 </td>
 </tr>

 <tr>
 <td colspan="5" align="left">
 <c:if test="${CustomerLoginAction.create}">
 <h:form id="navigform">
 <h:commandButton id="newsecretquestion" value="Add Secret Qustion" action="#{SecretQuestionsAction.toCreateForm}" />
 </h:form>
 </c:if>
 </td>
 </tr>
 </table>
</f:subview>
</f:view>
</body>
</html>

</ui:composition>

Now the problem is whenever i press some command button, it performs no action. And if i remove this part "[SecretQuestions]" from the value attribute of checkbox, the buttons start working. But I can not do multiple deletion. I am really stuck here.

thanx in advance

4. Re: Please Help (multiple row operations in a data table)

gavin.king Feb 14, 2007 2:09 AM (in response to ask4saif)

SecretQuestionsAction should have an @Name annotation.
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5. Re: Please Help (multiple row operations in a data table)

ask4saif Feb 15, 2007 1:32 AM (in response to ask4saif)
thanx gavin for your reply,

I am really sorry to write to you so late.

you wrote:

SecretQuestionsAction should have an @Name annotation.

It was my mistake, i forgot to paste the @Name annotation in my post, but it is present in my code. Here it is now,

@Stateless @Scope(EVENT) @Name("SecretQuestionsAction")

can you help me now, thanx alot.
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6. Re: Please Help (multiple row operations in a data table)

gavin.king Feb 15, 2007 11:05 AM (in response to ask4saif)

It appears that your command button that is bound to deleteSelection is *outside* the datatable with the list of selections!

It should be in a column of the datatable if you expect to be able to use @DataModelSelection.
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