Multiple EntityTypeMapping elements in EDMX

[fire-birdie]

Hi, and let me start by saying thanks for the awesome project.

I recently integrated Audit.EntityFramework into an existing project that uses an EDMX file. It worked perfectly, except for one entity that is mapped to modification functions. After some digging, I discovered that the designer had created two EntityTypeMapping elements for the entity, one containing the MappingFragment, and the other containing the ModificationFunctionMapping. This appears to be perfectly valid inside the various EF components, but results in an InvalidOperationException ("Sequence contains more than one element.") on line 161 of EntityKeyHelper.cs.

I've managed to get around the error by merging the two EntityTypeMapping elements in the EDMX, but since the designer has a mind of it's own, I wouldn't be surprised if it puts things back to the way they were the next time the file is updated from the database.

I noticed that, at runtime, EF had merged the function mapping metadata into the EntityTypeMapping instance that contained the fragment, however the opposite was not true, so it might be possible to prevent the error by filtering out EntityTypeMapping instances that don't contain any fragments. i.e. Line 161 could be updated to:

            .EntityTypeMappings.Single(m => m.Fragments.Count != 0)

Regards
Rory

[thepirat000]

Thanks for your comments!

This was fixed on v4.7 as your suggestion.

Regards

[fire-birdie]

Happy to help, thanks for the quick response.