EntityFramework.Extended Audit - foreign key property IsRelationship always false

Question

I am using the EntityFramework.Extended library to implement audit logging in my system. However, when I update the foreign key 'TitleId' on my Person object, it does not register it as a foreign key and does not replace the Id with my chosen display field.

Audit log config: (this is called in my Global.asax startup file)

public static class AuditLogConfiguration
    {
        public static void Register()
        {
            var auditConfiguration = AuditConfiguration.Default;

            auditConfiguration.IncludeRelationships = true;
            auditConfiguration.LoadRelationships = true;
            auditConfiguration.DefaultAuditable = true;

            // Use abbreviation value in audit log whenever Title is used as foreign key
            auditConfiguration.IsAuditable<Title>()
                .DisplayMember(x => x.Abbreviation);
        }
    }

Person entity:

public class Person
    {
        [Key]
        public int Id { get; set; }

        [ForeignKey("Title")]
        public int TitleId { get; set; }

        public string Forename { get; set; }
        public string Surname { get; set; }

        public virtual Title Title { get; set; }
}

Title entity:

public class Title
{
    public int Id { get; set; }

    public string Abbreviation { get; set; }
    public string Description { get; set; }
}

Update logic:

var audit = BeginAudit();

person.TitleId = model.TitleId;

SaveChanges();

var log = audit.LastLog;

When lookign through the property changes in audit.LastLog , the TitleId modification is not recognized as a relationship and is not applying my display conversion specified in the config.

Answer 1

The attribute for foreign key should go on the navigation property, not the foreign key itself:

[ForeignKey("TitleId")]
public virtual Title Title { get; set; }

But in this case you don't need the attribute at all, because your class is following a naming convention that Entity Framework recognises

And, since Title isn't the foreign key - TitleId is, I'd try this:

// Use abbreviation value in audit log whenever TitleId is used as foreign key
auditConfiguration.IsAuditable<TitleId>()
                  .DisplayMember(x => x.Abbreviation);