Webdyn and EJB Relational Entity Bean Problem

[Former Member]

Hello

i've been work with this problem for a few days.

the problem is:

Generate Two Relational Table with Entity in EJB

1.Company Table

2.User Table

and Generate Session Bean CRUD Template

User

and Create a Webdyn Relate With Bean...(Everything is Drag and Drop with out coding)

add excute function for the Bean in wdInit() in Component Controller

and i got this Error

The initial exception that caused the request to fail, was: 


com.sap.tc.webdynpro.progmodel.context.ContextException: NodeElement(.New1Comp.Request_CsrUserFacadeLocal_findAllCsrCompany): model node element cannot be created without a model instance 
    at com.sap.tc.webdynpro.progmodel.context.ModelNodeElement.<init>(ModelNodeElement.java:63)
    at com.csr2.csr2.ui.wd.wd.comp.new1comp.wdp.IPublicNew1Comp$IRequest_CsrUserFacadeLocal_findAllCsrCompanyElement.<init>(IPublicNew1Comp.java:349)
    at com.csr2.csr2.ui.wd.wd.comp.new1comp.wdp.IPublicNew1Comp$IContextNode.doCreateElement(IPublicNew1Comp.java:55)
    at com.sap.tc.webdynpro.progmodel.context.NodeInfo.createElement(NodeInfo.java:1269)
    at com.sap.tc.webdynpro.progmodel.context.Node.createElementInternal(Node.java:1104)
    ... 60 more

See full exception chain for details. 

the Important thing is the two table are Relate for One to Many

and when i generate the Entity also reted two entity with One to Many

is there anything tutorial for doing this associate with Related Entity..?

[junwu · Accepted solution]

please use the wizard to generate the code for model execution.

right click your component contrller-->apply template....

[Former Member · Accepted solution]

yes i did

all code is generated

below is the code which generated by template in component Controller

 //@@begin javadoc:wdDoInit()
	/** Hook method called to initialize controller. */
  //@@end
  public void wdDoInit()
  {
    //@@begin wdDoInit()
    //$$begin Service Controller0(-2133354062)
    initRequest_CsrUserFacadeLocal_findAllCsrCompany();
    executeCsrUserFacadeLocal_findAllCsrCompany();
    //$$end
    //@@end
  }

  public void initRequest_CsrUserFacadeLocal_findAllCsrCompany( )  {
    //@@begin initRequest_CsrUserFacadeLocal_findAllCsrCompany()
    //$$begin Service Controller0(-1205930989)
{
    com.csr2.csr2.ui.wd.csruserfacade.mdl.CsrUserFacade csrUserFacadeModel = createAndMapModelInstance("com.csr2.csr2.ui.wd.csruserfacade.mdl.CsrUserFacade");
        com.csr2.csr2.ui.wd.csruserfacade.mdl.Request_CsrUserFacadeLocal_findAllCsrCompany request_CsrUserFacadeLocal_findAllCsrCompany = wdContext.nodeRequest_CsrUserFacadeLocal_findAllCsrCompany().createAndAddRequest_CsrUserFacadeLocal_findAllCsrCompanyElement().modelObject();
        com.csr2.csr2.ui.wd.csruserfacade.mdl.Response_CsrUserFacadeLocal_findAllCsrCompany response = new com.csr2.csr2.ui.wd.csruserfacade.mdl.Response_CsrUserFacadeLocal_findAllCsrCompany(csrUserFacadeModel);
        request_CsrUserFacadeLocal_findAllCsrCompany.setResponse(response);
        java.util.List<com.csr2.csr2.ui.wd.csruserfacade.mdl.CsrCompany> response_return = new java.util.ArrayList<com.csr2.csr2.ui.wd.csruserfacade.mdl.CsrCompany>();
        response_return.add(new com.csr2.csr2.ui.wd.csruserfacade.mdl.CsrCompany(csrUserFacadeModel));
        response.setReturn(response_return);
}
    //$$end
    //@@end
  }

  public void executeCsrUserFacadeLocal_findAllCsrCompany( )  {
    //@@begin executeCsrUserFacadeLocal_findAllCsrCompany()
    //$$begin Service Controller0(442559406)
    try
    {
    wdContext.currentRequest_CsrUserFacadeLocal_findAllCsrCompanyElement().modelObject().execute();
    } catch(EJBModelExecuteException e){
    wdComponentAPI.getMessageManager().reportException( e.getMessage());
    }
    //$$end
    //@@end
  }

[junwu · Accepted solution]

check this if it gives any help.

[Former Member · Accepted solution]

i found this article

but i don't know what's this mean

Edited by: songbo piao on Jan 13, 2012 1:49 AM

[Former Member · Accepted solution]

problem solved

my case is using Oracle Database

below is my Problem solving Guide

1.JPA doesn't surpport Object Entity

so change all Object to String if is OK

2.Using NWDS Genreate Tool does not add entity to public part and do it manually

3.if two relational entity used by bean set fatch type to eager

if someone need my sample, i would love to help...

but i think these issue is basic... referance hibernate and so on

Edited by: songbo piao on Jan 13, 2012 8:51 AM

Edited by: songbo piao on Jan 13, 2012 8:51 AM

[Former Member]

already wrote it in my thread...