c# - EntityFramework ComplexType 引用 EntityType

Question

我对 EntityFramework 的 Code First 方法相当陌生，当我尝试创建引用实体类型的可重用复杂类型时遇到以下错误。

模型:

 class Bank
{
    public int Code { get; set; }
    public string Name { get; set; }
}
 class BankAccount
{
    public Bank Bank { get; set; }
    public int BankId { get; set; }
    public int Agency { get; set; }
    public int Account { get; set; }

}
 class Person
{
    public int Id { get; set; }
    public string Name { get; set; }
    public DateTime BirthDate { get; set; }
    public BankAccount BankAccount { get; set; }
}

数据库上下文:

class DemoContext : DbContext
{

    public DbSet<Bank> Banks { get; set; }
    public DbSet<Person> People { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {

        modelBuilder.Entity<Bank>().HasKey(b => b.Code);
        modelBuilder.ComplexType<BankAccount>();

    }

}

当我尝试添加迁移时，出现以下错误:

One or more validation errors were detected during model generation:

ComplexTypeProblem.EF.Bank: Name: Each type name in a schema must be unique. Type name 'Bank' is already defined.
ComplexTypeProblem.EF.Bank: : EntityType 'Bank' has no key defined. Define the key for this EntityType.
Banks: EntityType: EntitySet 'Banks' is based on type 'Bank' that has no keys defined.

在 ComplexType 具有指向 EntityType 的导航属性的情况下，实现这种关系是否有任何注意事项？

谢谢

Answer 1

ComplexType 不能包含 EntityType。只是反过来。

ComplexTypes 只是实体的属性，它们应该像普通字段一样处理您的代码。