Committing specific items

Question

Hey all !
In my model i have a Post entity and a Tag entity; and posts have tags. Simple !
In my form, when the user creates a tag that is not existing in the DB, I do:
- tagService.serviceControl.createItem(t:Tag)
- keep the returned ItemReference in memory;
- add the tag object to the tags list of my post.
Then when i want to save the post, I want to use my saved ItemReference to be sure of what will be committed. But when i do that i get the exception that says items are not managed by the dataStore:
Commit called with an item at array location: 0 which is not a managed item in this dataStore
I am a bit confused, because the help explicitly says that we can call commit with ItemReferences coming from serviceControl.getItem() or serviceControl.createItem().
// Create a tag
    var tag:Tag = new Tag();
    tag.name = name
    var it:ItemReference = tagService.createTag(tag);
    pendingNewTags[name] = it;
    post.tags.addItem(tag);
// Update post
    var a:Array = [];
    for each (var k:ItemReference in pendingNewTags)
        a.push(k);
    tagService.serviceControl.commit(a);
What should i pass instead of my ItemReferences ??
Thanks !

Answer 1

You can achieve this with AUTONOMOUS_TRANSACTION.
You create a seperate procedure for your Logging. Define it as AUTONOMOUS_TRANSACTION. And do a COMMIT inside that procedure.
Now you call the procedure in your main code and do your logging. So now the COMMIT inside the procedure for Logging is carried as a seperate transaction. So the calling transaction will not affect the Logging procedure.