Different DataContext Exception

[Emre Yılmaz]

Hi,

I get the below exception rarely;

[v.1.2-dev-2006-4-12 April 12 2006] Cannot set object as destination of 
relationship personelRel because it is in a different DataContext.

But I use a single context so it is not a different context with the other 
database objects. I think the reason of this exception is that I use the Object 
Select Query(named "PersonelCard") on cayenne modeller. I think when this query 
runs secondly after the first run, first query result refrences corrupted by 
second query results.Query make resusult caching: DataContext cache, refresh 
result and fetch limit,rows:1. Also I get this exception not the all of the run 
Query, this occurs rarely.
What can I do prevent this exception?

Query code:
public static DbObject get(String trNo,Integer cardNo) {
     try{
      Map<String,Object> parameters = new HashMap<String,Object>();
            parameters.put(TRANSPONDER_NO_PROPERTY, trNo);
            parameters.put(BADGE_NO_PROPERTY, cardNo);
            
      List cards = localContext.performQuery("PersonelCard", parameters, true);
      return (cards.size() > 0) ? (DbObject) cards.get(0) : null;
     }catch(Exception e){
   logObj.error(e.getMessage(),e);
   return null;
  }
    }