一對一關系模型

Question

我正在嘗試建立一對一的關系。 請在哪里寫這些行？

modelBuilder.Entity<OfficeAssignment>() 
    .HasRequired(t => t.Instructor) 
    .WithOptional(t => t.OfficeAssignment);

非常感謝！

Answer 1

您將在OnModelCreating方法中的上下文類中編寫這些代碼行

    public class MyContext : DbContext
    {

        public DbSet<OfficeAssignment> OfficeAssignments { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<OfficeAssignment>() 
                        .HasRequired(t => t.Instructor) 
                        .WithOptional(t => t.OfficeAssignment);

            base.OnModelCreating(modelBuilder);
        }
    }

Answer 2

您可以在上下文類中編寫此代碼，例如：

   public class AssignmentContext : DbContext
   {
      public IDbSet<OfficeAssignment> OfficeAssignments { get; set; }
      protected override void OnModelCreating(DbModelBuilder modelBuilder)
      {
          modelBuilder.Entity<OfficeAssignment>() 
             .HasRequired(t => t.Instructor) 
             .WithOptional(t => t.OfficeAssignment);
          base.OnModelCreating(modelBuilder);
      }
   }