AttachAsModified – a small step toward simplifying EF n-tier patterns

infoblog » AttachAsModified ??? a small step toward simplifying EF n-tier patterns

Fri, 31 Oct 2008 23:11:05 GMT

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I am puzzled

ursuletzu — Sat, 01 Nov 2008 13:18:41 GMT

I am puzzled how a team that develops a complex product like EF has been ignoring n=tier scenarios, how hard extensible is the framework. It leaves everybody, as is the hype now, WAITING for the next version.

I may say, that without designer which is useless (actually the mode is driven from the database), without ESQL which is an abomination, what EF really is can be developed by one person in a month. I personally use my own ORM. I cannot live with the scenarios that people from MS recommend because there are just shamefull. Why can I not have my persona IObjectTracker implementation? Why can i not use DI (/Unity for God's sake) to inject my POCO in an EF "model". It is just unbelievable to see that EF is poorer than NHIBERNATE which at least is some sort of extensible

re: AttachAsModified – a small step toward simplifying EF n-tier patterns

WardB — Sun, 02 Nov 2008 03:56:24 GMT

Actually, you don't have to wait for n-tier and EF. My company, IdeaBlade (www.IdeaBlade.com), has an affordable n-tier offering that is rooted in Entity Framework. It's called DevForce EF. It also works for Silverlight apps. And, yes, it handles optimistic concurrency without any special action on your part.

Now I realize that Danny's blog is not the place to advertise. I'm not fishing for an endorsement either. I'm really sorry about this, Danny, and you can erase this if you want to. But it doesn't seem right to leave people who desperately want both EF and n-tier utterly in the dark about their options.

re: AttachAsModified – a small step toward simplifying EF n-tier patterns

dsimmons@microsoft.com — Sun, 02 Nov 2008 10:22:59 GMT

@Ward, I don't mind the post. If some folks benefit from using DevForce EF, then I'm happy for them.

- Danny

re: AttachAsModified – a small step toward simplifying EF n-tier patterns

Anthony Sneed — Sat, 08 Nov 2008 19:28:14 GMT

Way to go Danny! This makes it a LOT easier to use EF with WCF in an n-tier application. I took it a little further by writing an extension method for converting a Data Transfer Object (DTO) to an EF Entity: http://blog.tonysneed.com/?p=120. Cheers,

Tony Sneed

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