Getting used to ObjectContext may take some time when coming from other ORM backgrounds, but in general most people have a rather smooth ride with it.
While I can theoretically see a value of (optionally?) selecting against uncommitted objects, I've never had a practical case for it in my apps. Which can be attributed to the way how I am designing persistent code with ObjectContext behavior in mind. So... maybe you can explain the problem you are trying to solve, and we can think of a better solution? Andrus On Oct 15, 2010, at 11:09 AM, Mathias Clerc wrote: > 2010/10/15 Andrey Razumovsky <razumovsky.and...@gmail.com>: >> SelectQuery is actually a query to database, so viewing not-yet-inserted >> objects with it is not possible. See recent discussion: >> http://cayenne.markmail.org/search/%20list:org.apache.cayenne.user#query:%20list%3Aorg.apache.cayenne.user+page:2+mid:6bwqse4t4czj73zq+state:results > > Thank you for your answers Borut and Andrey. > > I was able to do what I wanted through this hackish way : > > private static List updateContentWithCurrentState(List objects, > Class<?> objectClass, Expression e, > ObjectContext context) { > //Add new objects matching the class (limits in hierarchy, see > isInstance doc) > for (Object o : context.newObjects()) { > if (objectClass.isInstance(o)) { > objects.add(o); > } > } > //Remove any object deleted > for (Object o : context.deletedObjects()) { > if (objects.contains(o)) { > objects.remove(o); > } > } > //Apply filter (to remove non matching objects added at the beggining) > if (e != null) { > objects = e.filterObjects(objects); > } > return objects; > } > > Maybe it will not work in all cases, I am still early beginer but for > my tests it was enough. > > I am still puzzled by standard behaviour : > 1) Doing context.newObject(objectClass) and then selecting doesn't > show the new object > 2) Doing a ((MyClass)context.preformQuery().get(0)).setName("new") and > then selecting will return an object with the new name > 3) Doingcontext.deleteObject(object) and then selecting still returns > the original object > > In 1) and 3) data is returned as it is in the db, but not in the > context (DB snapshot) > In 2) data is returned as it is in the context, but not anymore in the > db (non DB snapshot) > > Quite confusing. >
