EF:物业“街”不是按“地址”类型申报的物业。

Question

当我试图获得所有带有实体框架6.1的Suppliers时，我会得到以下错误。

属性“Street”不是在“Address”类型上声明的属性。使用忽略方法或NotMappedAttribute数据注释验证该属性未显式排除在模型中。确保它是有效的原语属性。

我的实体看起来是这样的：

Supplier.cs：

public class Supplier : AggregateRoot
{
    // public int Id: defined in AggregateRoot class

    public string CompanyName { get; private set; }
    public ICollection<Address> Addresses { get; private set; }

    protected Supplier() { }

    public Supplier(string companyName)
    {
        CompanyName = companyName;
        Addresses = new List<Address>();
    }

    public void ChangeCompanyName(string newCompanyName)
    {
        CompanyName = newCompanyName;
    }
}

Address.cs：

public class Address : ValueObject<Address>
{
    // public int Id: defined in ValueObject class

    public string Street { get; }
    public string Number { get; }
    public string Zipcode { get; }

    protected Address() { }

    protected override bool EqualsCore(Address other)
    {
        // removed for sake of simplicity
    }

    protected override int GetHashCodeCore()
    {
        // removed for sake of simplicity
    }
}

我还定义了两个映射：

SupplierMap.cs

public class SupplierMap : EntityTypeConfiguration<Supplier>
{
    public SupplierMap()
    {
        // Primary Key
        this.HasKey(t => t.Id);

        // Properties
        this.Property(t => t.CompanyName).IsRequired();
    }
}

AddressMap.cs

public class AddressMap : EntityTypeConfiguration<Address>
{
    public AddressMap()
    {
        // Primary Key
        this.HasKey(t => t.Id);

        // Properties
        this.Property(t => t.Street).IsRequired().HasMaxLength(50);
        this.Property(t => t.Number).IsRequired();
        this.Property(t => t.Zipcode).IsOptional();
    }
}

但是，当我运行以下代码时，我给出了上面描述的错误：

using (var ctx = new DDDv1Context())
{
    var aaa = ctx.Suppliers.First(); // Error here...
}

当我从ICollection类中删除Supplier.cs并从db上下文中移除映射类时，代码可以工作：

public class DDDv1Context : DbContext
{
    static DDDv1Context()
    {
        Database.SetInitializer<DDDv1Context>(null);
    }

    public DbSet<Supplier> Suppliers { get; set; }
    public DbSet<Address> Addresses { get; set; } //Can leave this without problems

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        modelBuilder.Configurations.Add(new SupplierMap());

        // Now code works when trying to get supplier
        //modelBuilder.Configurations.Add(new AddressMap());
    }

}

为什么当我尝试将它与Address类和AddresMap类一起使用时，代码会出现错误呢？

Answer 1

您的Street属性是不可变的，它必须有一个setter才能使您的代码工作。目前，您没有在街上定义一个setter，这也是您得到错误的原因。