problems with association table...

From: I. Venuti (i.venut..aribel.it)
Date: Wed Apr 05 2006 - 08:12:09 EDT

  • Next message: Cris Daniluk: "Re: problems with association table..."

    Hi,

    I have a table (news) where I put some infos. I'd like to associate some
    documents to these news (maybe none). These documents resides in the
    table documents.
    I've created an association table called newsdocs, where there are the
    two id's: one for news and one for documents.

    The modeler recorgnises the relashionships (infact the object Newsdocs
    has only thwo relationships: toDocuments, toNews.
    Also in the object News there is an array (newsdocsArray) and in the
    object Documents (newsdocsArray).

    How can I create a relation between a news and a document?

    I have tried:

    1) created News: nw1 (via createANdRegisterNewObject)
    2) created Documents: doc2 (via createANdRegisterNewObject)
    3) commit
    4) created a black record for Newsdocs:

     Newsdocs ndoc = new Newsdocs();
     ndoc.setDataContext(...) // the same used in (via
    createANdRegisterNewObject)
     ndoc.setToDocuments(doc2); //****** NullPointerException
     ndoc.setToNews(nw1);
     doc2.addToNewsdocsArray(ndoc);
     nw1.add(via createANdRegisterNewObject)

    5) commit

    Unfortunatly this doesn't work: there is a NullPointerException in ******

    Maybe I need to understand better the use of relashionships. Any
    suggestion is wellcome!
    Thanks a lot

    -- Ivan

    This archive was generated by hypermail 2.0.0 : Wed Apr 05 2006 - 08:12:37 EDT