如果数据本质上是分层的,就像某种树结构一样.例如：

public class Foo
{
    public int Id { get; set; }
    public string Name { get; set; }
    public Foo Parent { get; set; }
    public ICollection<Foo> { get; set; }

    // Other business like methods here

}

使用DDD我将有我的接口和实现：

public interface IFooRepository
{
    Foo Get(int id);
}

public interface IFooFactory<TSource>
{
    Foo Create(TSource source);
}

public class sqlFooRepository: IFooRepository
{
    private readonly IFooDao dao;
    private readonly IFooFactory<sqlDataReader> factory;

    public sqlFooRepository(IFooDao dao,IFooFactory factory)
    {
        this.dao = dao;
        this.factory = factory;
    }

    public Foo Get(int id)
    {
        var resultSet = dao.Find(id);
        return factory.Create(resultSet);
    }
}

public class sqlFooFactory: IFooFactory<sqlDataReader>
{
    public Foo Get(sqlDataReader reader)
    {
        var foo = new Foo();
        foo.Id = (int) reader["id];
        foo.Name = (string) reader["name"];
            // Do I build the children accounts here
        return foo;
    }
}

如果我试图在工厂里修建孩子,那么我需要再次访问这个回购站.如果我在回购中做到这一点,我觉得我正在做工作,应该是工厂.不知道如何解决这个问题.

有一个想法是,Foo不是聚合根,而是FooTree是总根.所以试图获得任何Foo,我需要创建整个树,这意味着我可以将Foo对象的集合传递到FooTreeFactory.

任何帮助将非常感激.