DevForce Community Forum : multiple entity manager (second attempt)

multiple entity manager (second attempt) : The collection is an entity graph....

Mon, 01 Nov 2010 15:19:15 -700

Author: hueha
Subject: 2278
Posted: 01-Nov-2010 at 3:19pm

The collection is an entity graph. That entity key thing should work just fine, thanks.

multiple entity manager (second attempt) : On step 4 you have a collectionwith...

Mon, 01 Nov 2010 15:15:27 -700

Author: sbelini
Subject: 2278
Posted: 01-Nov-2010 at 3:15pm

On step 4 you have a collection with the imported entity (which, I assume, is the only entity in the collection):

_Mgr.ImportEntities(this.FindEntities(EntityState.Added | EntityState.Deleted | EntityState.Modified), MergeStrategy.OverwriteChanges);

So you can ref the entity from mgr2 and find it in _mgr by Key with FindEntity:

em2.FindEntity(myEntityInMgr2.EntityAspect.EntityKey);

multiple entity manager (second attempt) : I've finally got the motivation...

Sat, 30 Oct 2010 08:32:05 -700

Author: hueha
Subject: 2278
Posted: 30-Oct-2010 at 8:32am

I've finally got the motivation to have another crack at using multiple entity managers in my application. I've managed to get it to work for editing an entity but having problems with adding a new entity.

I have a grid displaying a list of entities (lets say orders for an employee). When I go to add a new entity these are the steps I'm going through. I have an issue at step 5

1) Create a new entity

_mgr.CreateEntity();

2) Create the new entity manager and copy this new item over

var mgr2 = new MyEntities();

mgr2.LinkForAuthentication(this);

mgr2.EntityChanged += (s, args) => { if (args.Action == EntityAction.Delete) { _mgr.RemoveEntity(args.Entity); } };

mgr2.ImportEntities(new Entity[] { root }, MergeStrategy.OverwriteChanges);

3) Make changes to this entity and save it

4) I copy the new entity back into the main entity manager

_Mgr.ImportEntities(this.FindEntities(EntityState.Added | EntityState.Deleted | EntityState.Modified), MergeStrategy.OverwriteChanges);

5) The problem I have is at this point I would normally add to the new Entity to RelatedEntityList to make the order appear for that employee. BUT how do I get a reference to the newly imported entity?