3 Replies Latest reply on Nov 7, 2007 10:14 AM by trickyvail

Error selecting object problem

jamesjmp Nov 6, 2007 12:28 PM

hi,
In a form I´ve a h:selectOneMenu which is filled according to the values of a List.

 <s:decorate id="firmCodeDecoration" template="layout/edit.xhtml">
 <ui:define name="label">#{messages['Firm']}</ui:define>
 <h:selectOneMenu value="#{rstReportHome.instance.firm}" required="true" id="firm">
 <s:selectItems value="#{firmList.resultList}" var="firm" label="#{firm.firmCode}" />
 <s:convertEntity/>
 <a:support event="onchange" reRender="firmCodeDecoration"/>
 </h:selectOneMenu>
 </s:decorate>

Component firmList is seam-gened with just a simple query this way:

 @Override
 public String getEjbql() {
 return "select firm from Firm firm";
 }

I want in my selectOneMenu to display all the values of table Firm, but I do want an extra value as well.
Let´s call it "Automatic".
I´ve added the following to component firmList:

 @Override
 public List<Firm> getResultList() {
 System.out.println("firmList getResultList!!");
 Firm auto = new Firm();
 auto.setFirmCode("AUTOMATIC");
 CfgCurrency cfgCurrency = new CfgCurrency();
 cfgCurrency.setCurrencyCode(60);
 auto.setCfgCurrency(cfgCurrency);
 List<Firm> firmas = new ArrayList<Firm>();
 firmas.add(auto);
 firmas.addAll(super.getResultList());
 System.out.println("firmas.size: "+firmas.size());
 return firmas;
 }

After adding this, selectOneMenu displays AUTOMATIC value as well as the rest retrieved by the query.
But when I press a button that performs persist() ajax validation displays red message besides with "Error selecting object" only If I choose Automatic option.
I guess it must be something related with s:convertEntity, but I´m not sure how to tackle it.

This is firm object:

@Entity
@Table(name = "FIRM", catalog = "prisk")
public class Firm implements java.io.Serializable {

 private String firmCode;
 private CfgCurrency cfgCurrency;
 private String firmDescription;
 private Set<RstReport> rstReports = new HashSet<RstReport>(0);
 private Set<Fund> funds = new HashSet<Fund>(0);

 public Firm() {
 firmCode = "";
 firmDescription = "";
 }

What is the best way to add an extra value (apart from those provided by the query) to be displayed in a selectOneMenu?
If overriding getResultList is one of the ways, why I´m having that validation problem?
thanks in advance!

1. Re: Error selecting object problem

trickyvail Nov 6, 2007 1:46 PM (in response to jamesjmp)
I believe you are right about the tag having problems. I think it is because the Automatic object you create has not been persisted and won't have an id.

Here's a suggestion for something you could try:
<h:selectOneMenu value="#{rstReportHome.specialfirm}" ...> <s:selectItems ... noSelectionLabel="AUTOMATIC"/> public Firm getSpecialFirm() { return getInstance().getFirm(); } public void setSpecialFirm(Firm firm) { if(firm == null) { // create a new automatic firm. firm = new Firm(); firm.setStuff("stuff"); } getInstance().setFirm(firm); }

I'm guessing that noSelection returns a null here.
Please post your results. Thanks.
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2. Re: Error selecting object problem

jamesjmp Nov 7, 2007 5:52 AM (in response to jamesjmp)

thanks for the idea!
Error selecting object doesn´t appear anymore, but now it´s turn for this one:
value is required (javax.faces.component.UIInput.REQUIRED)

This is the code I´ve added: (following your sample)

In RstReportHome.java


private Firm specialFirm;

 public Firm getSpecialFirm() {
 System.out.println("getSpecialFirm!!");
 return getInstance().getFirm();
 }

 public void setSpecialFirm(Firm firm) {
 System.out.println("setSpecialFirm!!");
 if(firm == null) {
 System.out.println("setSpecialFirm - asignando AUTOMATIC!!");
 firm = new Firm();
 firm.setFirmCode("AUTOMATIC");
 CfgCurrency cfgCurrency = new CfgCurrency();
 cfgCurrency.setCurrencyCode(60);
 firm.setCfgCurrency(cfgCurrency);

 } else {
 System.out.println("setSpecialFirm - firm no null "+firm.getFirmDescription());
 }
 getInstance().setFirm(firm);
 }

In the view:

 <s:decorate id="firmCodeDecoration" template="layout/edit.xhtml">
 <ui:define name="label">#{messages['Firm']}</ui:define>
 <h:selectOneMenu value="#{rstReportHome.specialFirm}" required="true" id="firm">
 <s:selectItems value="#{firmList.resultList}" var="firm" label="#{firm.firmCode}" noSelectionLabel="AUTOMATIC"/>
 <s:convertEntity/>
 <a:support event="onchange" reRender="firmCodeDecoration"/>
 </h:selectOneMenu>
 </s:decorate>

any further idea? I guess the solution must be near ;-)

3. Re: Error selecting object problem

trickyvail Nov 7, 2007 10:14 AM (in response to jamesjmp)
The seam documentation says
noSelectionLabel ? specifies the (optional) label to place at the top of list
(if required="true" is also specified then selecting this value will cause a
validation error)

so try
<h:selectOneMenu required="false" value="#{rstReportHome.specialFirm}" id="firm">

I'm not sure if JSF will submit a null to setSpecialFirm() when the non-selection is selected, so you may have to adapt the form's action method to check for this situation and create a new automatic entity.

P.S. You don't need
private Firm specialFirm;

inside RstReportHome.java.
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