Sql server EF迁移正在为聚合PK生成第二个索引

我正试图为我的项目创建一个新的迁移，但我遇到了一个尴尬的局面。。。我有我的聚合根实体：

public class Classroom : Entity, IAggregateRoot
{
    // PK
    public int ClassroomId { get; set; }

    // ....
    public virtual ClassroomStreaming Streaming { get; set; }
}

及合计：

public class ClassroomStreaming : Entity
{
    // PK
    public int ClassroomId { get; set; }
    public virtual Classroom Classroom { get; set; }

    // Fields
    public string EmbedCode { get; set; }

    // ...
}

这些映射是：

public class ClassroomMap : EntityTypeConfiguration<Classroom>
{
    public ClassroomMap()
    {
        this.HasKey(t => t.ClassroomId);
        this.ToTable("Classroom");
        // ....

        // One to One
        this.HasOptional(t => t.Streaming)
            .WithRequired(p => p.Classroom);
    }
}

这是正常的行为吗？看看它在SQL Server中的表现：

---

看起来您在两个EntityTypeConfiguration类中双重映射了您的关系。我认为你只需要在一个方向上定义关系

文档说明，对于一对零或一关系，请使用.HasOptional.WithRequired定义它，就像您在ClassroomMap中所做的那样。您应该能够删除ClassroomStreamingMap类中的.HasRequired.WithOptional

public class ClassroomStreamingMap: EntityTypeConfiguration<ClassroomStreaming>
{
    public ClassroomStreamingMap()
    {
        // Primary Key
        this.HasKey(t => new { t.ClassroomId });

        // Table & Column Mappings
        this.ToTable("ClassroomStreaming");

        this.Property(t => t.ClassroomId)
            .HasDatabaseGeneratedOption(DatabaseGeneratedOption.None);

        // Relationships
        this.HasRequired(t => t.Classroom)
            .WithOptional(p => p.Streaming)
            .WillCascadeOnDelete(true);
    }
}

public override void Up()
{
    CreateTable(
        "dbo.ClassroomStreaming",
        c => new
            {
                ClassroomId = c.Int(nullable: false),
                // ....
            })
        .PrimaryKey(t => t.ClassroomId)
        .ForeignKey("dbo.Classroom", t => t.ClassroomId, cascadeDelete: true)
        .Index(t => t.ClassroomId);
}