NHibernate：不能通過無狀態會話錯誤消息獲取代理

Question

我正在使用nHibernate無狀態會話來獲取對象，更新一個屬性並將對象保存回數據庫。

我不斷收到錯誤消息：

代理不能由一個無狀態的會話中獲取

我有類似的代碼別處工作，所以我想不通這是爲什麼不加工。有誰知道這個問題可能是什麼？

我試圖更新ScreenLockVersion屬性。

映射：

<?xml version="1.0" encoding="utf-8" ?> 
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" 
        assembly="ApplicationUtilities" 
        namespace="ApplicationUtilities.Concurrency"> 
    <class name="Screen" table="concurrency_screen" dynamic-update="true" optimistic-lock="all"> 
    <id name="ID" column="screenID"> 
     <generator class="identity" /> 
    </id> 
    <property name="ScreenName" column="screenName" /> 
    <property name="SubScreenName" column="subScreenName" /> 
    <property name="ScreenLockID" column="screenLockID" /> 
    <property name="ScreenLockVersion" column="screenLockVersion" /> 
    <property name="ScreenLockRequired" column="screenLockRequired" /> 
    <many-to-one name="Parent" class="Screen" column="parentScreenID" /> 
    <many-to-one name="Identity" class="ApplicationUtilities.SystemIdentity.Identity" column="identityID" /> 
    <many-to-one name="Application" class="ApplicationName" column="applicationID" /> 
    <one-to-one name="LastModified" class="LastModified" property-ref="Screen" cascade="all" /> 
    <bag name="AffectedScreens" table="concurrency_affectedScreen" cascade="all"> 
     <key column="updatedScreenID" /> 
     <many-to-many column="affectedScreenID" class="Screen" /> 
    </bag> 
    <bag name="ChildScreens" table="concurrency_screen"> 
     <key column="parentScreenID" /> 
     <many-to-many column="screenID" class="Screen" /> 
    </bag> 
    </class> 
</hibernate-mapping> 

代碼：

public class Screen : BaseDomain 
{ 
    private string screenName; 
    private string subScreenName; 
    private Screen parent; 
    private IList<Screen> childScreens = new List<Screen>(); 
    private IList<Screen> affectedScreens = new List<Screen>(); 
    private Guid screenLockID; 
    private int screenLockVersion; 
    private bool screenLockRequired; 
    private LastModified lastModified; 
    private Identity identity; 
    private ApplicationName application; 

    protected Screen() 
    { 
     this.parent = null; 
     this.screenLockRequired = false; 
    } 

    /// <summary> 
    /// Create new parent screen 
    /// </summary> 
    /// <param name="screenName">parent screenname</param> 
    public Screen(string screenName, ApplicationName application) 
    { 
     this.screenName = screenName; 
     this.subScreenName = null; 
     this.parent = null; 
     this.application = application; 
    } 

    /// <summary> 
    /// Create new subscreen 
    /// </summary> 
    /// <param name="screenName">parent screen name</param> 
    /// <param name="subScreenName">subscreen name</param> 
    /// <param name="parent">reference to parent screen</param> 
    public Screen(string screenName, string subScreenName, Screen parent, ApplicationName application) 
    { 
     this.screenName = screenName; 
     this.subScreenName = subScreenName; 
     this.application = application; 
     this.parent = parent; 
    } 

    #region Properties 
    public virtual IList<Screen> AffectedScreens 
    { 
     get { return affectedScreens; } 
     set { affectedScreens = value; } 
    } 

    public virtual Screen Parent 
    { 
     get { return parent; } 
     set { parent = value; } 
    } 

    public virtual IList<Screen> ChildScreens 
    { 
     get { return childScreens; } 
     set { childScreens = value; } 
    } 

    public virtual string ScreenName 
    { 
     get { return screenName; } 
     set { screenName = value; } 
    } 

    public virtual string SubScreenName 
    { 
     get { return subScreenName; } 
     set { subScreenName = value; } 
    } 

    public virtual Guid ScreenLockID 
    { 
     get { return screenLockID; } 
     set { screenLockID = value; } 
    } 

    public virtual int ScreenLockVersion 
    { 
     get { return screenLockVersion; } 
     set { screenLockVersion = value; } 
    } 

    public virtual bool ScreenLockRequired 
    { 
     get 
     { 
      if (parent != null) 
       return parent.ScreenLockRequired; 
      else 
       return screenLockRequired; 
     } 
     set { screenLockRequired = value; } 
    } 

    public virtual LastModified LastModified 
    { 
     get { return lastModified; } 
     set { lastModified = value; } 
    } 

    protected internal virtual Identity Identity 
    { 
     get { return identity; } 
     set { identity = value; } 
    } 

    public virtual ApplicationName Application 
    { 
     get { return application; } 
     set { application = value; } 
    } 
    #endregion 

    #region Methods 
    public override string ToString() 
    { 
     return ScreenName + SubScreenName; 
    } 

    public override bool Equals(object obj) 
    { 
     Screen other = obj as Screen; 

     if (other == null) 
      return false; 

     if (string.IsNullOrEmpty(SubScreenName)) 
     { 
      if(string.IsNullOrEmpty(other.SubScreenName)) 
       return ScreenName.Equals(other.ScreenName) && Application.Equals(other.Application); 
      else 
       return false; 
     } 
     else if (string.IsNullOrEmpty(other.SubScreenName)) 
      return false; 
     else 
      return ScreenName.Equals(other.ScreenName) && SubScreenName.Equals(other.SubScreenName) && Application.Equals(other.Application); 
    } 

    public override int GetHashCode() 
    { 
     if(SubScreenName == null) 
      return ScreenName.GetHashCode()^Application.GetHashCode(); 
     else 
      return ScreenName.GetHashCode()^SubScreenName.GetHashCode()^Application.GetHashCode(); 
    } 
    #endregion 
} 

Answer 1

無狀態會話不支持延遲加載。您需要提前加載您的實體（在您當前僅加載代理的相同查詢中）。