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Customer specific model changes (code first)
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smi-mark View Drop Down
DevForce MVP
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Joined: 24-Feb-2009
Location: Dallas, Texas
Posts: 343 		Post Options Post Options   Quote smi-mark Quote  Post ReplyReply Direct Link To This Post Topic: Customer specific model changes (code first)
    Posted: 19-May-2012 at 2:08pm
Very cool, thanks for sharing
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Thomas View Drop Down
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Posts: 23 		Post Options Post Options   Quote Thomas Quote  Post ReplyReply Direct Link To This Post Posted: 19-May-2012 at 4:31am
Just if anyone else is interessted. In EF you can solve the problem by using the following in the DBContext (constructor):

(this as IObjectContextAdapter).ObjectContext.MetadataWorkspace.LoadFromAssembly(typeof(<entity from other assembly>).Assembly);

The only problem is that this is currently not supported by DevForce, but according to sbelini it is logged as a feature request.
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Posts: 343 		Post Options Post Options   Quote smi-mark Quote  Post ReplyReply Direct Link To This Post Posted: 18-May-2012 at 10:49am
You could have a partial class for each customer that needs specific changes and then use conditional compilation symbols

Entity_Customer1.cs
#if CUSTOMER1
properties here
#endif

Entity_Customer2.cs
#if CUSTOMER2
properties here
#endif

Not the cleanest but I'm not sure how else you will achieve it
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Thomas View Drop Down
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Posts: 23 		Post Options Post Options   Quote Thomas Quote  Post ReplyReply Direct Link To This Post Posted: 17-May-2012 at 11:47pm
This was also the only "solution" that I got to work. The problem is that by using this method I don't really know how to manage multiple customers properly. 
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Posts: 786 		Post Options Post Options   Quote sbelini Quote  Post ReplyReply Direct Link To This Post Posted: 17-May-2012 at 4:43pm
Hi Thomas,
 
After doing some experimenting I found that unfortunately this is not possible.
 
The issue I came accross is that it can't find the BaseEntity type in the custom assembly.
 
A possible solution would be using partial classes. Howeve, in this case all code should be in the same assembly.
 
Regards,
   Silvio.
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Thomas View Drop Down
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Posts: 23 		Post Options Post Options   Quote Thomas Quote  Post ReplyReply Direct Link To This Post Posted: 16-May-2012 at 3:47am
I am currently working on a structure for a base project which I would like to extend from for the customers.

That means if there are no changes I would have something like a core model project and a customer model project which just has empty classes that extend the base model classes, but if there is a change that is only relevant for the customer I would just do a change for the customer model project.

Would this work with DevForce (EF) code first?



Edited by Thomas - 16-May-2012 at 3:48am
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