Question

I am using Entity Framework 4.3.1 code first. I have 2 tables in my database with their column names listed:

Statuses table:

StatusID int
Status varchar(50)

RequestStatuses table:

RequestStatusID int
RequestStatus varchar(50)

I have 2 classes:

public class Status : IEntity
{
     public int Id { get; set; }
     public string Name { get; set; }

     public RequestStatus RequestStatus { get; set; }
}

public class RequestStatus : IEntity
{
     public int Id { get; set; }
     public string Name { get; set; }

     public Status Status { get; set; }
}

My database context class:

public class ICaseDbContext : DbContext
{
     public DbSet<Status> Statuses { get; set; }
     public DbSet<RequestStatus> RequestStatuses { get; set; }

     protected override void OnModelCreating(DbModelBuilder modelBuilder)
     {
          modelBuilder.Configurations.Add(new StatusConfiguration());
          modelBuilder.Configurations.Add(new RequestStatusConfiguration());
     }
}

Their configurations:

class StatusConfiguration : EntityTypeConfiguration<Status>
{
     internal StatusConfiguration()
     {
          this.ToTable("Statuses");
          this.Property(x => x.Id).HasColumnName("StatusID");
          this.Property(x => x.Name).HasColumnName("Status");
     }
}

class RequestStatusConfiguration : EntityTypeConfiguration<RequestStatus>
{
     internal RequestStatusConfiguration()
     {
          this.ToTable("RequestStatuses");
          this.Property(x => x.Id).HasColumnName("RequestStatusID");
          this.Property(x => x.Name).HasColumnName("RequestStatus");
     }
 }

The data in each table is like this:

RequestStatuses table:

RequestStatusID     RequestStatus
1                   RequestStatus1
2                   RequestStatus2
3                   RequestStatus3
4                   RequestStatus4

Statuses table:

StatusID            Status
1                   Status1
2                   Status2
3                   Status3
4                   Status4

The primary key of each table matches the primary key in the other table. So if I have a request status of RequestStatus1 then the corresponding status must be Status1. If I have a status of Status3 then the corresponding request status must be RequestStatus3.

Is this possible?

How do I set thtis up in EF

Answer 1

I think you want a 1:1 mapping, so both ends are required, using Id’s as the key.

Updating your configurations like this will create the tables you want:

class StatusConfiguration : EntityTypeConfiguration<Status>
{
    internal StatusConfiguration()
    {
        this.ToTable("Statuses");
        this.Property(x => x.Id).HasColumnName("StatusID");
        this.Property(x => x.Name).HasColumnName("Status");

        this.HasRequired(x => x.RequestStatus)
            .WithRequiredPrincipal();

    }
}

class RequestStatusConfiguration : EntityTypeConfiguration<RequestStatus>
{
    internal RequestStatusConfiguration()
    {
        this.ToTable("RequestStatuses");
        this.Property(x => x.Id).HasColumnName("RequestStatusID");
        this.Property(x => x.Name).HasColumnName("RequestStatus");

        this.HasRequired(x => x.Status)
           .WithRequiredDependent();
    }
}