NHibernate映射问题-无法初始化代理-没有会话 [英] NHibernate mapping problem - Could not initialize proxy - no Session

问题描述

我刚刚开始学习NHibernate，并且正在学习以下教程.在我自己的学习项目中，我为自己解决了一个问题.我有两个桌子:

I have just started to learn NHibernate, and are following tutorials. On my own learning project, I have made up a problem for myself. I have two tables:

Team:
TeamId*
Name


Match:
MatchId*
TeamAId
TeamBId

模型实体为:

团队

public virtual int? TeamId { get; private set; }
public virtual string Name { get; set; }
public virtual IList<Match> HomeMatches { get; set; }
public virtual IList<Match> AwayMatches { get; set; }

匹配

public virtual int? MatchId { get; private set; }
public virtual Team TeamA { get; set; }
public virtual Team TeamB { get; set; }

这是我对Team的映射:

And this is my mapping for Team:

    <property name="Name" type="string">
        <column name="Name" sql-type="nvarchar" not-null="true"/>
    </property>


    <bag name="HomeMatches" inverse="true" cascade="all-delete-orphan">
        <key column="TeamAId" />
        <one-to-many class="Match"/>
    </bag>

    <bag name="AwayMatches" inverse="true" cascade="all-delete-orphan">
        <key column="TeamBId" />
        <one-to-many class="Match"/>
    </bag>

这是针对Match的:

And this is for Match:

    <many-to-one name="TeamA" class="Team">
        <column name="TeamAId" sql-type="int" not-null="true" />
    </many-to-one>

    <many-to-one name="TeamB" class="Team">
        <column name="TeamBId" sql-type="int" not-null="true" />
    </many-to-one>

我猜这不是正确的方法，因为我收到一条错误消息: NHibernate.LazyInitializationException:正在初始化[MyProject.Domain.Entities.Team#1]-无法初始化代理-没有会话.

I guess this isn't the right way to do it, since I get an error message: NHibernate.LazyInitializationException: Initializing[MyProject.Domain.Entities.Team#1]-Could not initialize proxy - no Session.

1. 我的映射有问题吗?
2. 如果没有，关于如何处理错误的任何建议?

谢谢.

推荐答案

问题不在于映射，而在于会话处理.

The problem is not with your mapping, but with your session handling.

您正在关闭会话，然后尝试访问延迟加载的媒体资源(团队).

You are closing the session and then trying to access a lazily-loaded property (a Team).

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