实体框架在种子数据库上插入重复项[重复]

here 我尝试在种子设定方法中分配Id,结果失败 好的,语言 但当我向客户添加地址并将Id分配给这些地址时,它不会再次创建副本。。。

我尝试的是:

• 创建一个 欺骗
• 增加1种语文及;1个地址(带Id)-将这两个地址添加到1个客户 => 制造一个复制品
• 不会产生一个
• 不 制作一个复制品

----编辑

我完全不知道为什么会发生这种情况,它是在我调用base.Seed(ctx)时发生的;方法,我确信,因为在此之后,我在Web应用到达任何其他位置之前停止了它。

此实体客户具有相关的实体语言以及地址集合。

我有 another post open (还没有建议)当同样的问题突然发生时,我自己没有对我的模型或播种方法做任何更改。。。

基本实体:

public class BaseEntity
{
    public int ID { get; set; }
}

客户:

public class Customer:BaseEntity
{
    public string Name { get; set; }
    public Language Language { get; set; }
    public ICollection<Address> Addresses { get; set; }
}

语言:

public class Language : BaseEntity

{
    public string Name { get; set; }
    public string LanguageCode { get; set; }

    [Required]
    public ICollection<Customer> Customers { get; set; }
}

public class Address : BaseEntity
{
    public Customer Customer { get; set; }
}

  Language newLanguageNL = new Language("Dutch");
  newLanguageNL.ID = 1;

  Language newLanguageFR = new Language("French");
  newLanguageFR.ID = 2;

  Language newLanguageEN = new Language("English");
  newLanguageEN.ID = 3;

  ctx.Languages.Add(newLanguageNL); 
  ctx.Languages.Add(newLanguageEN); 
  ctx.Languages.Add(newLanguageFR);

  Address addressBE = new Address("informatica laan", "10", "bus nr 1", "8900", "België");
  addressBE.ID = 1;

  Address addressBE2 = new Address("rue de l'informatique", "20", "boite nr 2", "7780", "Belgique");
  addressBE2.ID = 2;

  Address addressEN = new Address("techstreet", "30", "box nr 1", "4000", "Bulgaria");
  addressEN.ID = 3;

  ctx.Addresses.Add(addressEN);
  ctx.Addresses.Add(addressBE);
  ctx.Addresses.Add(addressBE2);

  Customer newCustomer = new Customer("Customer name", newLanguageNL, addressBE);
  // ctx.Customers.AddOrUpdate(c => c.Name, newCustomer);
  ctx.Customers.Add(newCustomer);

  base.Seed(ctx);

     protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);      

        // setting the Product FK relation required + related entity
        modelBuilder.Entity<Entity.ProductSupplierForContract>().HasRequired(psfc => psfc.Product)
                                                            .WithMany(p => p.ProductSupplierForContracts)
                                                            .HasForeignKey(psfc => psfc.Product_Id);

        // setting the Supplier FK relation required + related entity
        modelBuilder.Entity<Entity.ProductSupplierForContract>().HasRequired(psfc => psfc.Supplier)
                                                           .WithMany(s => s.ProductSupplierForContracts)
                                                           .HasForeignKey(psfc => psfc.Supplier_Id);

        // setting the Contract FK relation required + related entity
        modelBuilder.Entity<Entity.ProductSupplierForContract>().HasOptional(psfc => psfc.Contract)
                                                          .WithMany(c => c.ProductSupplierForContracts)
                                                          .HasForeignKey(psfc => psfc.Contract_Id);


        modelBuilder.Entity<Entity.PurchasePrice>()
     .ToTable("PurchasePrices");

        modelBuilder.Entity<Entity.SalesPrice>()
    .ToTable("SalesPrices");

        // Bundle in Bundle
        modelBuilder.Entity<Entity.Bundle>().HasMany(b => b.ChildBundles);                      
    }

谁能在这一点上帮助我,请提前感谢您的任何反馈。