Question

想象一下以下场景：我在一对多关系中有两个类，我尝试从一个类加载所有对象，同时也加载所有关联的对象。以下是这两个类的骨架结构：

public class Parent
{
    //... id and other members omitted

    [Association(Name = "FK_Parent_Children", Storage = "_entries", ThisKey = "Id")]
    public EntitySet<Child> Children {
        get { return _children; }
    }
    private readonly EntitySet<Child> _children = new EntitySet<Child>();
}

public class Child
{
    //... id and other members omitted

    [Column]
    internal int? _belongId;

    private EntityRef<Parent> _belong;
    [Association(Name = "FK_Parent_Children", Storage = "_belong", ThisKey = "_belongId", OtherKey = "Id", IsForeignKey = true)]
    public Parent Belong
    {
        get { return _belong.Entity; }
        set { _belong.Entity = value; }
    }
}

这里是我尝试加载所有对象的代码：

using(var context = new MyContext())
{
    context.DeferredLoadingEnabled = false;

    var options = new DataLoadOptions();    
    options.AssociateWith<Parent>(c => c.Children.OrderByDescending(x => x.Born).Take(100));    
    options.LoadWith<Parent>(m => m.Children);
    context.LoadOptions = options;

    var parents = context.Parents.OrderBy(m => m.LastName).ToList();
    return parents; 
}

有趣的是，最多只有一个“Child”被一直加载到EntitySet中，尽管通常有更多的对象与单个“Parent”相关联。知道我在这里做错了吗？

Answer 1

我从来没有找到导致这种不稳定行为的原因，最后放弃了这样做。

DataContext与DataLoadOptions和LoadWith返回错误的条目数量

1 个答案: