Question

I have these classes:

public class AllegationContent {

    @DatabaseField(generatedId = true)
    protected long id;

    @DatabaseField(canBeNull = true, foreign = true)
    private AllegationItem allegationItem;

    @DatabaseField()
    protected String content;
    ...
}

And:

public class AllegationItem {
   @DatabaseField(generatedId = true)
    protected long id;

    @ForeignCollectionField(eager = false)
    protected ForeignCollection<AllegationContent> allegationContent;
    ...
}

How can I persist both?
I am trying this:

    allegationContentDao = getAllegationContentDao();   
    AllegationContent allegationContent = new AllegationContent(); 
    allegationContent.setContent("allegation content");     
    allegationContentDao.create(allegationContent);

    allegationItemDao = getAllegationItemDao();
    AllegationItem allegationItem = new AllegationItem();
    AllegationContent allegationContent2 = allegationContentDao.queryForSameId(allegationContent);  //is that wrong?
    allegationItem.getAllegationContent().add(allegationContent2);
    allegationItemDao.create(allegationItem);

but I got this error:

04-24 10:41:57.128: ERROR/AndroidRuntime(802): java.lang.RuntimeException: Unable to start activity ComponentInfo{br.com.project/br.com.project.DaoTestActivity}: java.lang.NullPointerException

Answer 1

I solved. The table can’t create because don’t have atributes, only id (what’s another problem). The NPE happen because getAllegationContent return null, so first I need create a ForeignCollection list, set using setAllegationContent and then get.