DevForce Community Forum : When is InverseProperty required http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2012 : When is InverseProperty required Sat, 11 Apr 2026 08:09:12 -700 Mon, 11 Feb 2013 05:42:53 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=3987 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ When is InverseProperty required : Thanks Marcel, this is now working.Edited... http://www.ideablade.com/forum/forum_posts.asp?TID=3987&PID=15861#15861 Author: gregweb
Subject: 3987
Posted: 11-Feb-2013 at 5:42am

Thanks Marcel, this is now working.

Edited by gregweb - 13-Feb-2013 at 5:37am]]> Mon, 11 Feb 2013 05:42:53 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3987&PID=15861#15861 When is InverseProperty required : The attributes are required if... http://www.ideablade.com/forum/forum_posts.asp?TID=3987&PID=15860#15860 Author: mgood
Subject: 3987
Posted: 09-Feb-2013 at 2:11pm

The attributes are required if you don't name things according to EF Code First Conventions and/or don't describe the foreign key relationships using the fluent API. TempHire names everything according to convention, that's why you don't see the ForeignKeyAttribute and InversePropertyAttribute.

You can find more on the EF CF conventions at the following link. One thing to watch out for, DevForce requires foreign key properties in addition to the navigation properties, otherwise you gonna get problems. In EF, foreign key properties are optional, but recommended. 

http://msdn.microsoft.com/en-US/data/jj679962 
]]> Sat, 09 Feb 2013 14:11:51 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3987&PID=15860#15860 When is InverseProperty required : I have a code first project with... http://www.ideablade.com/forum/forum_posts.asp?TID=3987&PID=15859#15859 Author: gregweb
Subject: 3987
Posted: 09-Feb-2013 at 12:09pm

I have a code first project with a DbInitializer to seed the database.

It has three Entities, a Contact, a Rate, and a RateType table.

There is one FK relationship between the Rate and the Contact.

If I run the project without seeding the data, the tables are created and the FK is created properly.

However, if I try to seed the database, when a contact is added an error is thrown which says "Could not set the property/field Rates" There is an inner exception of Object Ref not set to Instance of Object.

Looking in the debug window at the contact when it is being created shows that the Rates property is null.

However, if I add the InverseProperty on Rates, then it all works fine.

        [DataMember]
        [InverseProperty("ContactEntity")]
        public RelatedEntityList<Rate> Rates { get; internal set; }

So I don't get it. When is InverseProperty required? TempHire doesn't use the property, and I can get it to generate a SQL Server db just fine.

Greg]]> Sat, 09 Feb 2013 12:09:58 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3987&PID=15859#15859