Not creating bean while submitting form...

Question

i am using struts for displaying and updating data in jsp. my form bean is as follows:
public class AppraisalDataForm extends ActionForm {
     private String name;
     private String appraisalId;
     private String empId;
     private String appraisalFromDate;
     private ArrayList<AppraisalHeadDt> appraisalHeadDts;
     private ArrayList<AppraisalPerformanceDt> appraisalPerformanceDts; 
                // getters and settersAppraisalHeadDt.java is as follows:
public class AppraisalHeadDt  implements Serializable {
     private AppraisalHeadDtPK compId;
     private String accessMode;
     private String appraiserComments;
     private String appraiserId;
     private Integer appraiserRating;
                // getter and settersAppraisalHeadDtPK.java is as follows:
public class AppraisalHeadDtPK implements Serializable {
     private String appraisalId;
     private String empId;
     private String headType;
                   // getters and settersmy Jsp is as follows:
<logic:iterate id="appraisalHeadDt" indexId="index" name="AppraisalDataForm" property="appraisalHeadDts" type="com.yash.services.appraisal.hbeans.AppraisalHeadDt">
                                            <nested:define id="compId" name="appraisalHeadDt" property="compId" type="com.yash.services.appraisal.hbeans.AppraisalHeadDtPK"/>
                                             <html:hidden name="appraisalHeadDt" property="compId.appraisalId" indexed="true"/>
                                             <html:hidden name="appraisalHeadDt" property="compId.empId" indexed="true"/>
                                             <tr>
                                                  <td align="center">
                                                       <html:select name="appraisalHeadDt" property="compId.headType" indexed="true">
                                                            <nested:options collection="HeaderTypes" labelProperty="value" property="key"/>
                                                       </html:select>
                                                  </td>
                                                  <td align="center">
                                                       <html:select name="appraisalHeadDt" property="waitage" indexed="true" >
                                                            <nested:options collection="Ratings" labelProperty="value" property="key"/>
                                                       </html:select>
                                                  </td>
                                                  <td align="center">
                                                       <html:select name="appraisalHeadDt" property="difficultyLevel" indexed="true" >
                                                            <nested:options collection="Ratings" labelProperty="value" property="key"/>
                                                       </html:select>
                                                  </td>                                            .
                                                                    .i want to display it on jsp and user can modify that data which need to submit in action class.
now i m able to display data properly but at time of submiting data it throws exception :
javax.servlet.ServletException: BeanUtils.populate
     org.apache.struts.util.RequestUtils.populate(RequestUtils.java:495)
     org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:816)
java.lang.IllegalArgumentException: No bean specified
     org.apache.commons.beanutils.PropertyUtilsBean.getPropertyDescriptor(PropertyUtilsBean.java:751)
     org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:937)

Answer 1

Indexed forms are always difficult. And you've got a double nested item there.
Can you pinpoint a bit better exactly which of the fields here is creating a problem?
My instinct would be the one with the doubly nested bean - referring to the compId.headType"
If you remove that control, do the other bits work correctly?
You might try switching on some logging for the BeanUtils to see exactly which property it is trying to set on which bean and see the logging can give you more insight into what is happening.
I would also suggest starting with a simpler example that works, and then building back up to this one.
Hope this helps,
evnafets