Question

I have two classes:

public class Fighter
{
    public int FighterID { get; set; }
    public int DivsionID { get; set; }
    public string Name { get; set; }
    //...
    public virtual Division Division { get; set; }
}

public class Division
{
    public int DivisionID { get; set; }
    public string Name { get; set; }
    public int? FromWeight { get; set; }
    public int? ToWeight { get; set; }
    public ICollection<Fighter> Fighters { get; set; }
}

Why do I have Division_DivisionID on my Fighters table ? I thought the DevisionID should be the FK.

Answer 1

I wrote an article on how this works, take a look at http://blog.staticvoid.co.nz/2012/07/entity-framework-navigation-property.html – See How does Entity Framework detect Navigation Properties

In short this is due to a convention which says FKs are named

<LocalPropertyName>_<ForeignIdPropertyName>

Also see Entity Framework Navigation Property generation rules

to make EF name the FK DivisionID, add the following to your modelbuilder

        modelBuilder.Entity<Fighter>()
            .HasRequired(f => f.Division)
            .WithMany(d => d.Fighters)
            .HasForeignKey(f => f.DivisionID);