Hi Mark, I'm not sure exactly what you're doing to cause the error, a unit test would definitely help there.
The openjpa.DetachState property is a way to specify which fields will be present when an entity is detached. Using a different DetachState value may result in different results depending on your fetch-group and usage pattern. In either case I don't think a field would be reset to null at detach time though. Maybe I've misunderstood your scenario though. -mike On Fri, Nov 26, 2010 at 11:51 AM, Mark Struberg <strub...@yahoo.de> wrote: > a side note: it works if I use > <property name="openjpa.DetachState" value="fetch-groups"/> > > But it looks most likely as a bug to me because I don't serialize the > detached entity, nor do I invoke native queries to get it, etc - just plain > JPA! So it must give me exactly the same results regardless of the detach > strategy I use... > > Should I file a JIRA? > > LieGrue, > strub > > --- On Fri, 11/26/10, Mark Struberg <strub...@yahoo.de> wrote: > > > From: Mark Struberg <strub...@yahoo.de> > > Subject: AttachStrategy Question > > To: dev@openjpa.apache.org > > Date: Friday, November 26, 2010, 4:54 PM > > Hi folks! > > > > I have a question regarding OpenJPA-2.0.1 AttachStrategy > > DETACH_LOADED. > > > > I have an entity with a Date field. This field gets filled > > with the current date and stored to the database. Afterwards > > it gets loaded from the database and detached. In the next > > request the date will be reset to null. And here comes the > > problem (around AttachStrategy#178): > > > > > > case > > JavaTypes.OBJECT: > > case > > JavaTypes.OID: > > case > > JavaTypes.ENUM: > > val > > = fetchObjectField(i); > > ---> if (val == > > null && !nullLoaded) <-- problem > > > > return false; > > > > sm.settingObjectField(into, i, sm.fetchObjectField(i), val, > > > > set); > > > > break; > > > > This leads to not getting the date field reset to null in > > the database while merging the entity. > > > > Imo this should only be skipped if the field didn't got > > loaded previously from the database. I bet this information > > is available, but where can I get this information from? > > > > Are some bells ringing, or should I try to craft a unit > > test? > > > > txs and LieGrue, > > strub > > > > > > > > > > > > > >
