学步园

    [ActiveRecord()]
public class Blog
    {
private Guid id;

        [PrimaryKey(PrimaryKeyType.Assigned, "ID")]
public Guid ID
        {
get { return id; }
set { id = value; }
        }

private IList post = new ArrayList();

        [HasMany(typeof(Post), ColumnKey = "Blog_ID", Table = "Post",
          Cascade = ManyRelationCascadeEnum.None, Lazy = true)]
public IList Post
        {
get { return post; }
set { post = value; }
        }
    }

    [ActiveRecord()]
public class Post
    {
private Guid id;

        [PrimaryKey(PrimaryKeyType.Assigned, "ID")]
public Guid ID
        {
get { return id; }
set { id = value; }
        }

private string  title;

        [Property()]
public string  Title
        {
get { return title; }
set { title = value; }
        }

private Blog blog;

        [BelongsTo("Blog_ID")]
public Blog Blog
        {
get { return blog; }
set { blog = value; }
        }

    }

测试一:

  Guid id1 =Guid.NewGuid(); 
  Guid id2 = Guid.NewGuid();
using (SessionScope scope = new SessionScope())
  {
      Blog blog1 = new Blog();
      blog1.ID = id1;
      ActiveRecordMediator<Blog>.Create(blog1);
      Post post = new Post();
      post.ID = id2;
      post.Blog = blog1;
      ActiveRecordMediator<Post>.Create(post);
      Console.WriteLine(blog1.Post.Count);//输出0
      Blog blog2 = ActiveRecordBase.Find(id1);
      Console.WriteLine(blog2.Post.Count);//输出0
   }
   using (SessionScope sc = new SessionScope())
   {
      Blog blog3 = ActiveRecordBase<Blog>.Find(id1);
      Console.WriteLine(blog3.Post.Count);//输出1
   }

测试二:

   Guid id1 =Guid.NewGuid(); 
   Guid id2 = Guid.NewGuid();
   using (SessionScope scop = new SessionScope())
   {
      Blog blog1 = new Blog();
      blog1.ID = id1;
      ActiveRecordMediator<Blog>.Create(blog1);
   }
   using (SessionScope sc = new SessionScope())
    {
      Blog blog2 = ActiveRecordBase<Blog>.Find(id1);
      Post post = new Post();
      post.ID = id2;
      post.Blog = blog2;
      ActiveRecordMediator<Post>.Create(post);
      Console.WriteLine(blog2.Post.Count);①//输出1
      ／＊＊＊＊＊＊＊＊＊
      Post post2 = new Post();
      post2.ID = Guid.NewGuid();
      post2.Blog = blog2;
      Console.WriteLine(blog2.Post.Count);②//输出1
      ／＊＊＊＊＊＊＊＊＊
     }

测试一：

说明在一个SessionScope里创建带有lazyload属性的对象同时又在这个SessionScope里读取时,lazeload的那个
属性读取的是脏数据，原因是在创建这个对象的时候已经将这个对象加到了AR的一级缓存,在这个SessionScope再读取时是读取的缓存对象．

测试二：

在这个过程中遇到的一个郁闷问题：跑测试2的时候,有时候①输出的是1,有时候是0,找出规律是只要不调试都是输出1,一调试有时候输出1,有时候输出0,原因是在跟踪代码的时候,如下图,如果在 ActiveRecordMediator<Post>.Create(post);之前查看了Blog的Post属性的话,这个时候已经将该lazeload的属性从数据库读出来放到一级缓存里了,在这个SessionScope里面再读取的值都不会变化,所以出现"有时候①输出的是1,有时候是0".加上"/****"之间的代码查看输出结果，①②都输出1再次证明这个结论．