error 2016: Condition cannot be specified for Column member

Posted by IP on Stack Overflow See other posts from Stack Overflow or by IP
Published on 2010-03-16T22:30:35Z Indexed on 2010/03/17 23:21 UTC
Read the original article Hit count: 404

Filed under:

entity-framework

|

VS2010

I am having some issues with Entity Framework in VS2010

The problem I'm getting is described very well here...

http://social.msdn.microsoft.com/Forums/en/adonetefx/thread/cacf6a76-09a8-4c90-9502-d8b87c2f6bea

It's basically happening when a Foreign key is pointed at the primary key of another table...but if I take off the StoreGeneratedPattern as "Identity", then it tries to insert a value into the identity field

** EDIT So, what it seems to be is that EF4 can't handle a null relationship when the primary key is set to StoreGeneratedPattern="Identity". If I create a FK pointing to this primary key, and make it nullable (effectively creating a 0...M relationship), then it throws this compilation error.

Removing StoreGeneratedPattern="Identity" fixes the issue, but causes issues elseware It works if the foreign key is set to not nullable

© Stack Overflow or respective owner

Related posts about entity-framework

Differences Between NHibernate and Entity Framework

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
Introduction NHibernate and Entity Framework are two of the most popular O/RM frameworks on the .NET world. Although they share some functionality, there are some aspects on which they are quite different. This post will describe this differences and will hopefully help you get started with the one… >>> More
Entity Framework & Binding syncronisation

as seen on Stack Overflow - Search for 'Stack Overflow'
* EDIT * Sorry, I should make it clearer. Imagine I have an entity: public class MyObject { public string Name { get; set; } } And I have a ListBox: <ListBox x:Name="lbParts"> <ListBox.ItemTemplate> <DataTemplate> <TextBlock Text="{Binding Name}"/> … >>> More
Joins and UI Binding with the Entity Framework

as seen on Internet.com - Search for 'Internet.com'
Learn how to build queries with the Entity Framework that involve multiple tables as well as binding in the UI with the EntityDataSource. >>> More
Frederick .NET User Group April 2010 Meeting

as seen on Geeks with Blogs - Search for 'Geeks with Blogs'
FredNUG is pleased to announce that we have an excellent speaker lined up for April. On April 20th, we’ll start with pizza and social networking at 6:30 PM. Then, starting at 7 PM, Dane Morgridge will present “Getting Started with Entity Framework 4” The scheduled agenda is: 6:30 PM - 7:00… >>> More
[News] NHibernate vs MS Entity Framework

as seen on Dot Net Guru - Search for 'Dot Net Guru'
Voil? une question qui se posera de plus en plus avec la sortie prochaine de .NET V4 et Entity Framework V4, l'outil de mapping objet/relationnel de Microsoft. M?me s'il est vrai que l'opinion de Ayende peut para?tre biais?e du fait qu'il est contributeur NHibernate, son point de vue et surtout ses… >>> More

Related posts about VS2010

Uninstall of VS2010 RC gets stuck on uninstall of Crystal Reports templates for VS2010

as seen on Stack Overflow - Search for 'Stack Overflow'
The progress bar is stuck at 100%. Any suggestions for the best/cleanest way torwards a healthy install of VS2010 Final Release? I have this problem all the time with the MS Installer (MSIEXEC.exe/setup.exe). Previously, reinstalling the MS Installer didn't help. >>> More
Insufficient Permissions Problems with MSDeploy and TFS Build 2010

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
I ran into these problems on a TFS 2010 RC setup where I wanted to deploy a web site as part of the nightly build: C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v10.0\Web\Microsoft.Web.Publishing.targets (3481): Web deployment task failed.(An error occurred when reading the IIS Configuration… >>> More
Package and Publish Web Sites with TFS 2010 Build Server

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
To package and publish web sites with TFS 2010 Build Server, you can use MSDeploy and some of the new MSBuild arguments. For example: /p:DeployOnBuild=True /p:DeployTarget=MsDeployPublish /p:MSDeployPublishMethod=InProc /p:CreatePackageOnPublish=True /p:DeployIisAppPath="Default Web… >>> More
Web 2.0 Extension for ASP.NET

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
ASP.NET is now much extended to support line of business and data centric applications, providing Web 2.0 rich user interfaces within a native web environment. New capabilities allowed by the Visual WebGui extension turn Visual Studio into a rapid development tool for the web, leveraging the wide… >>> More
Design by Contract with Microsoft .Net Code Contract

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
I have done some talks on different events and summits about Defensive Programming and Design by Contract, last time was at Cornerstone’s Developer Summit 2010. Next time will be at SweNug (Sweden .Net User Group). I decided to write a blog post about of some stuffs I was talking about. Users are… >>> More