[ojb-users] Re: Storing mapped objects

[<jo...@ga...>]

Hi,

yu didn't post your mapping but I guess you've forgotten so set
<auto.update>true</auto.update>,
am I right?
(See OJB-tutorial "1:n mappings" for details)

Joerg

Hi,

 I have a doubt regarding the storing of mapped objects. I tried to
implement
 the 1:1 relationship between the ProductGroup and Article. Whenever i was
 setting the product instance in the article and when i persist the article
 the ProductGroup is not persisted. Look at the code below,

    Article article = new Article();
         article.setArticleName ("TestArticle");

         ProductGroup prodGrp = new ProductGroup();
         prodGrp.setProdGroupName("Group1");
         prodGrp.setDescription ("Testgroup");

         article.setProductGroup (prodGrp);
         try {
             broker.beginTransaction();
             broker.store(article);
             broker.commitTransaction();
         } catch (PersistenceBrokerException pExp) {
             System.out.println ("----- Error persisting Article -----");
             pExp.printStackTrace();
         } // end of try-catch

 There are two tables namely the ProductGroup and Article. And the mapping
is
 all done as per the tutorial:3.

 With the above code, i expected the ProductGroup to be saved as well. But i
 had to persist the ProductGroup object ('prodGrp') separately. Is this a
bug
 or iam missing out a funda here?

 This was the case with the 1:n mapping as well.

 I retrieve the ProductGroup and add articles to it. But i persist the
 ProductGroup hoping that the objects in the collection are also persisted.
 But i dont find the articles persisted. Code is below,

      Criteria qryCriteria = new Criteria();
         qryCriteria.addEqualTo ("prodGroupName","Grocery");
         QueryByCriteria criterion = new QueryByCriteria
(ProductGroup.class,
                                                      qryCriteria);
         ProductGroup prodGroup = (ProductGroup)broker.
             getObjectByQuery(criterion);
         Article art1 = new Article();
         art1.setArticleName ("Tea");
         art1.setProductGroup (prodGroup);

         Article art2 = new Article();
         art2.setArticleName ("Coffee");
         art2.setProductGroup (prodGroup);

         prodGroup.addArticle (art1);
         prodGroup.addArticle (art2);

         try {
             broker.beginTransaction();
             broker.store(prodGroup);
             broker.commitTransaction();
             System.out.println("--- Added the articles ---");

         } catch (PersistenceBrokerException pExp) {
             System.out.println("---- Error storing 1:n relation objs ---");
             pExp.printStackTrace();
         } // end of try-catch

 any help in this regard would be greatly appreciated

 regds
 gover


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