Code First Circular Reference Foreign Key Configuration - entity-framework

Question

The following code creates foreign key errors when all code is not commented.
public class Parent
{
public int Id { get; set; }
public string Name { get; set; }
public int FavoriteChildId { get; set; }
public Child FavoriteChild { get; set; }
//public int WorstChildId { get; set; }
public Child WorstChild { get; set; }
public ICollection<Child> Children { get; set; }
}
public class Child
{
public int Id { get; set; }
public string Name { get; set; }
//public int ParentId { get; set; }
public Parent Parent { get; set; }
}
public class CFContext : DbContext
{
public DbSet<Parent> Parents { get; set; }
public DbSet<Child> Children { get; set; }
}
It works if the foreign key names aren't specified but then there's no way to edit the models. Does anyone know how to specify the foreign key names?

Answer 1

Following the naming convention will create the proper FK's above - your code:
public int WorstChildId { get; set; }
public Child WorstChild { get; set; }
Does create the FK of WorstChildId for WorstChild. However, when I tried the code you had above, I got a multiple delete path error (Parent -> WorstChild -> ChildTable, Parent -> FavoriteChild -> ChildTable)
You can set either one, or both of your mappings to not cascade on delete, and that will fix your problem:
public class CFContext : DbContext
{
public DbSet<Parent> Parents { get; set; }
public DbSet<Child> Children { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Child>()
.HasRequired(c => c.Parent)
.WithRequiredPrincipal(p => p.WorstChild)
.WillCascadeOnDelete(false);
modelBuilder.Entity<Child>()
.HasRequired(c => c.Parent)
.WithRequiredPrincipal(p => p.FavoriteChild)
.WillCascadeOnDelete(false);
}
}