Entity Framework 5 using multiple relationships between two POCOs - entity-framework

Question

I'm having issues applying multiple relationships (or possibly foreignkey) on two POCO objects. I've got the first relationship many-to-many working and when the database is created it creates the three tables (Projects, Users and ProjectsUsers) needed for the relationship.
Code so far:
public class Project
{
public int ProjectId { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public DateTime? StartDate { get; set; }
public DateTime? CompletionDate { get; set; }
public bool Deleted { get; set; }
public ICollection<User> Users { get; set; }
}
public class User
{
public User()
{
Name = new Name();
}
public int UserId { get; set; }
public string LoginId { get; set; }
public string Password { get; set; }
public Name Name { get; set; }
public ICollection<Project> ManagedProjects { get; set; }
}
public class ProjectConfiguration : EntityTypeConfiguration<Project>
{
public ProjectConfiguration()
{
HasMany(x => x.Users)
.WithMany(x => x.ManagedProjects);
}
}
public UserConfiguration()
{
HasMany(x => x.ManagedProjects)
.WithMany(x => x.Users);
}
Now I want to add an optional one-to-one relationship of Project.ManagingUser -> User. However, I can't seem to figure out how to indicate this in the configuration.
Code for what I think is needed:
public class Project
{
public int ProjectId { get; set; }
public string Name { get; set; }
public string Description { get; set; }
public DateTime? StartDate { get; set; }
public DateTime? CompletionDate { get; set; }
public bool Deleted { get; set; }
public int? ManagingUserId { get; set; }
public User ManagingUser { get; set; }
public ICollection<User> Users { get; set; }
}
I don't think the User object needs to change.
This shows my last attempt on mapping the new relationship:
public ProjectConfiguration()
{
HasMany(p => p.Users)
.WithMany(u => u.Projects);
this.HasOptional(p => p.ManagingUser)
.WithOptionalDependent()
.Map(m=>m.MapKey("ManagingUserId"))
.WillCascadeOnDelete(false);
}
What is happening when the database is created, I now end up with only two tables (Projects and Users). And it looks like it is only trying to setup the one-to-one relationship.
Can someone tell me what I'm missing?
Richard I've not changed the UserConfiguration and below is the DbContext:
public class MyDbContext : DbContext
{
public MyDbContext() : base(Properties.Settings.Default.ConnectionString)
{
}
public DbSet<User> Users { get; set; }
public DbSet<Project> Projects { get; set; }
}

Answer 1

You probably want WithMany instead of WithOptionalDependent - it's a one:many relationship, not a one:one.
HasOptional(p => p.ManagingUser)
.WithMany()
.HasForeignKey(m => m.ManagingUserId)
.WillCascadeOnDelete(false);
EDIT
I think you're missing the OnModelCreating override from the DbContext class:
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
modelBuilder.Configurations.Add(new ProjectConfiguration());
modelBuilder.Configurations.Add(new UserConfiguration());
}