DevForce Community Forum : Deep copy an entity tree http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2010 : Deep copy an entity tree Wed, 10 Jun 2026 17:29:34 -700 Tue, 31 Aug 2010 13:37:01 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=2089 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Deep copy an entity tree : Clone will be fixed for the release... http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8296#8296 Author: ting
Subject: 2089
Posted: 31-Aug-2010 at 1:37pm

Clone will be fixed for the release this week.  Sorry for the false start!
]]> Tue, 31 Aug 2010 13:37:01 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8296#8296 Deep copy an entity tree : My bad. I should have tested this... http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8230#8230 Author: ting
Subject: 2089
Posted: 26-Aug-2010 at 4:28pm

My bad.  I should have tested this first.  ICloneable.Clone does not have the correct implemenation.  I have an architect looking at this.



Edited by ting - 26-Aug-2010 at 4:29pm]]> Thu, 26 Aug 2010 16:28:45 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8230#8230 Deep copy an entity tree : Thanks Ting, If I do as you... http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8202#8202 Author: bigme
Subject: 2089
Posted: 25-Aug-2010 at 9:20pm

Thanks Ting,

 If I do as you say above then I get a new order (without OrderDetails), but the original order has its PK changed to the same value as the newly added order !!

So it seemed that I should NOT explicitly add the cloned Order to the mgr.Orders collection, but just rely on the cloning of the Customer navigation property? When I do this I don't get a new Order, but it still changes the PK of the current order (the one being cloned)

I suspect this is related to the fact that I am working with a collection of customer.Orders and not mgr.Orders??

Dave.]]> Wed, 25 Aug 2010 21:20:48 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8202#8202 Deep copy an entity tree : You can clone an entity by explicitly... http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8201#8201 Author: ting
Subject: 2089
Posted: 25-Aug-2010 at 7:43pm

You can clone an entity by explicitly casting to IClonable and calling Clone().  This will return you a detatched entity with all of the fields copied.  You should now call EntityManager.GenerateID() to assign it a new primary key and add it to the EntityManager.  Make sure to assign the primary key before adding it to the EntityManager.
 
Here's an example:
Employee newEmployee = (Employee) ((ICloneable)employee).Clone();
mgr.GenerateId(newEmployee, Employee.PropertyMetadata.EmployeeID);
mgr.AddEntity(newEmployee);
 
]]> Wed, 25 Aug 2010 19:43:14 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8201#8201 Deep copy an entity tree : The Order and OrderDetails are,... http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8194#8194 Author: bigme
Subject: 2089
Posted: 25-Aug-2010 at 3:29pm

The Order and OrderDetails are, of course, standard IdeaBlade-generated objects and collections, a la Northwind.

Dave.
]]> Wed, 25 Aug 2010 15:29:31 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8194#8194 Deep copy an entity tree : I have an existing Order and a... http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8167#8167 Author: bigme
Subject: 2089
Posted: 24-Aug-2010 at 4:44pm

I have an existing Order and a collection of OrderDetails that I need to duplicate as the basis for a new order. At the moment I simply create new entities and copy the properties I want. Is there a less brittle, more DevForce-oriented way to do this?

Dave.

]]> Tue, 24 Aug 2010 16:44:45 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=2089&PID=8167#8167