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我在應用NHibernate Fluent Automapping時遇到了一些問題。它在測試項目中效果很好。但現在..需要關於'沒有persister'的幫助：'Fluent Nhibernate Automapping的例外
Test method [PROJECTNAME].SubscriptionTest.SubscriptionConstructorTest threw exception: NHibernate.MappingException: No persister for: [PROJECTLIB].SubscriptionManagerRP
類（然後再次，相同的異常以更簡單的TestClass出現 - 這樣的問題不應該在這裏）：
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Xml", "2.0.50727.4927")]
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://docs.oasis-open.org/wsn/b-2")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://docs.oasis-open.org/wsn/b-2", IsNullable = false)]
[System.Runtime.Serialization.DataContractAttribute(Name = "SubscriptionManagerRP", Namespace = "http://docs.oasis-open.org/wsn/b-2")]
public class SubscriptionManagerRP
{
private string id;
public string Id
{
get
{
return id;
}
set
{
id = value;
}
}
public Boolean Save()
{
DatabaseAccess access = new DatabaseAccess();
var sessionFactory = access.getSessionFactory();
//try
//{
using (var session = sessionFactory.OpenSession())
{
using (var transaction = session.BeginTransaction())
{
SaveTextMess(this.ToString());
session.Save(this);
transaction.Commit();
return true;
}
}
//}
//catch (Exception e)
//{
// SaveTextMess("ERROR: " + e);
// Console.WriteLine(e);
//}
//SaveTextMess("false");
return false;
}
private void SaveTextMess(String output)
{
//Just for Demo purposes, saving text file per message that should be sent
// create a writer and open the file
TextWriter tw = new StreamWriter("C:\\Temp\\CespSubscriptionManagerRPMessage.txt");
// write a line of text to the file
tw.WriteLine(output);
// close the stream
tw.Close();
}
//###################################
[EditorBrowsable(EditorBrowsableState.Never)]
private EndpointReferenceType consumerReferenceField;
[EditorBrowsable(EditorBrowsableState.Never)]
private FilterType filterField;
[EditorBrowsable(EditorBrowsableState.Never)]
private SubscriptionPolicyType subscriptionPolicyField;
[EditorBrowsable(EditorBrowsableState.Never)]
private System.DateTime creationTimeField;
[EditorBrowsable(EditorBrowsableState.Never)]
private bool creationTimeFieldSpecified;
private static System.Xml.Serialization.XmlSerializer serializer;
/// <summary>
/// .ctor class constructor
/// </summary>
public SubscriptionManagerRP()
{
this.subscriptionPolicyField = new SubscriptionPolicyType();
this.filterField = new FilterType();
this.consumerReferenceField = new EndpointReferenceType();
}
[System.Runtime.Serialization.DataMemberAttribute()]
public EndpointReferenceType ConsumerReference
{
get
{
return this.consumerReferenceField;
}
set
{
this.consumerReferenceField = value;
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public FilterType Filter
{
get
{
return this.filterField;
}
set
{
this.filterField = value;
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public SubscriptionPolicyType SubscriptionPolicy
{
get
{
return this.subscriptionPolicyField;
}
set
{
this.subscriptionPolicyField = value;
}
}
[System.Runtime.Serialization.DataMemberAttribute()]
public System.DateTime CreationTime
{
get
{
return this.creationTimeField;
}
set
{
this.creationTimeField = value;
}
}
[System.Xml.Serialization.XmlIgnoreAttribute()]
[System.Runtime.Serialization.DataMemberAttribute()]
public bool CreationTimeSpecified
{
get
{
return this.creationTimeFieldSpecified;
}
set
{
this.creationTimeFieldSpecified = value;
}
}
private static System.Xml.Serialization.XmlSerializer Serializer
{
get
{
if ((serializer == null))
{
serializer = new System.Xml.Serialization.XmlSerializer(typeof(SubscriptionManagerRP));
}
return serializer;
}
}
#region Serialize/Deserialize
/// <summary>
/// Serializes current SubscriptionManagerRP object into an XML document
/// </summary>
// <returns>string XML value</returns>
public virtual string WriteObject()
{
System.IO.StreamReader streamReader = null;
System.IO.MemoryStream memoryStream = null;
try
{
memoryStream = new System.IO.MemoryStream();
Serializer.Serialize(memoryStream, this);
memoryStream.Seek(0, System.IO.SeekOrigin.Begin);
streamReader = new System.IO.StreamReader(memoryStream);
return streamReader.ReadToEnd();
}
finally
{
if ((streamReader != null))
{
streamReader.Dispose();
}
if ((memoryStream != null))
{
memoryStream.Dispose();
}
}
}
/// <summary>
/// Deserializes workflow markup into an SubscriptionManagerRP object
/// </summary>
// <param name="xml">string workflow markup to deserialize</param>
// <param name="obj">Output SubscriptionManagerRP object</param>
// <param name="exception">output Exception value if deserialize failed</param>
// <returns>true if this XmlSerializer can deserialize the object; otherwise, false</returns>
public static bool ReadObject(string xml, out SubscriptionManagerRP obj, out System.Exception exception)
{
exception = null;
obj = default(SubscriptionManagerRP);
try
{
obj = ReadObject(xml);
return true;
}
catch (System.Exception ex)
{
exception = ex;
return false;
}
}
public static bool ReadObject(string xml, out SubscriptionManagerRP obj)
{
System.Exception exception = null;
return ReadObject(xml, out obj, out exception);
}
public static SubscriptionManagerRP ReadObject(string xml)
{
System.IO.StringReader stringReader = null;
try
{
stringReader = new System.IO.StringReader(xml);
return ((SubscriptionManagerRP)(Serializer.Deserialize(System.Xml.XmlReader.Create(stringReader))));
}
finally
{
if ((stringReader != null))
{
stringReader.Dispose();
}
}
}
/// <summary>
/// Serializes current SubscriptionManagerRP object into file
/// </summary>
// <param name="fileName">full path of outupt xml file</param>
// <param name="exception">output Exception value if failed</param>
// <returns>true if can serialize and save into file; otherwise, false</returns>
public virtual bool SaveToFile(string fileName, out System.Exception exception)
{
exception = null;
try
{
SaveToFile(fileName);
return true;
}
catch (System.Exception e)
{
exception = e;
return false;
}
}
public virtual void SaveToFile(string fileName)
{
System.IO.StreamWriter streamWriter = null;
try
{
string xmlString = WriteObject();
System.IO.FileInfo xmlFile = new System.IO.FileInfo(fileName);
streamWriter = xmlFile.CreateText();
streamWriter.WriteLine(xmlString);
streamWriter.Close();
}
finally
{
if ((streamWriter != null))
{
streamWriter.Dispose();
}
}
}
/// <summary>
/// Deserializes workflow markup from file into an SubscriptionManagerRP object
/// </summary>
// <param name="xml">string workflow markup to deserialize</param>
// <param name="obj">Output SubscriptionManagerRP object</param>
// <param name="exception">output Exception value if deserialize failed</param>
// <returns>true if this XmlSerializer can deserialize the object; otherwise, false</returns>
public static bool LoadFromFile(string fileName, out SubscriptionManagerRP obj, out System.Exception exception)
{
exception = null;
obj = default(SubscriptionManagerRP);
try
{
obj = LoadFromFile(fileName);
return true;
}
catch (System.Exception ex)
{
exception = ex;
return false;
}
}
public static bool LoadFromFile(string fileName, out SubscriptionManagerRP obj)
{
System.Exception exception = null;
return LoadFromFile(fileName, out obj, out exception);
}
public static SubscriptionManagerRP LoadFromFile(string fileName)
{
System.IO.FileStream file = null;
System.IO.StreamReader sr = null;
try
{
file = new System.IO.FileStream(fileName, FileMode.Open, FileAccess.Read);
sr = new System.IO.StreamReader(file);
string xmlString = sr.ReadToEnd();
sr.Close();
file.Close();
return ReadObject(xmlString);
}
finally
{
if ((file != null))
{
file.Dispose();
}
if ((sr != null))
{
sr.Dispose();
}
}
}
#endregion
#region Clone method
/// <summary>
/// Create a clone of this SubscriptionManagerRP object
/// </summary>
public virtual SubscriptionManagerRP Clone()
{
return ((SubscriptionManagerRP)(this.MemberwiseClone()));
}
#endregion
}
從類的保存方法上述（看起來簡單TestClass的是，在測試項目中的工作原理相同）：
public Boolean Save()
{
DatabaseAccess access = new DatabaseAccess();
var sessionFactory = access.getSessionFactory();
//try
//{
using (var session = sessionFactory.OpenSession())
{
using (var transaction = session.BeginTransaction())
{
SaveTextMess(this.ToString());
session.Save(this);
transaction.Commit();
return true;
}
}
//}
//catch (Exception e)
//{
// SaveTextMess("ERROR: " + e);
// Console.WriteLine(e);
//}
//SaveTextMess("false");
return false;
}
我在哪裏設置連接字符串和會話工廠：
class SessionFactoryController
{
public SessionFactoryController()
{
}
public ISessionFactory GiveFactory()
{
return CreateSessionFactory();
}
private static void ReferByteCode(){
//Just to make sure the ByteCodeCastle is loaded
ProxyFactory fake = new ProxyFactory();
}
private static ISessionFactory CreateSessionFactory()
{
ReferByteCode();
var cfg = new FluentNhibernateConfiguration();
return Fluently.Configure()
.Database(
FluentNHibernate.Cfg.Db.MsSqlConfiguration.MsSql2005
.ConnectionString("[SERVER];Database=Pets;User ID=NHibernateTester;Password=[PASSWORD];Trusted_Connection=False;")
)
.Mappings(m =>
m.AutoMappings
.Add(AutoMap.AssemblyOf<SubscriptionManagerRP>(cfg))
)
.BuildSessionFactory();
}
}
配置：
class NotifyFluentNhibernateConfiguration : DefaultAutomappingConfiguration
{
public override bool ShouldMap(Type type)
{
return type.Namespace == "System.Xml.XmlAttribute";
}
}
的配置是處理較早的映射例外 'System.Xml.XmlAttribute'。
如果數據庫設置不正確，是否可能出現此錯誤？我已經完成了一個測試，使用一個類，我知道NHibernate Automapping（從另一個項目）測試數據庫（與其他項目相同）。我仍然得到同樣的例外，但是對於'簡單'類。
所以這不是課堂。
它不是連接字符串，因爲它是從另一個很棒的項目中複製而來的。
它不是數據庫上的設置（或至少安全/訪問設置）。我認爲如果我錯誤地配置了表格，它應該會出現另一個錯誤，如前所述，當我將它指向另一個項目中的某些東西時，我會得到相同的異常。
我已經刪除了一切，並重寫了一次，只是爲了確保我沒有做一些小小的愚蠢錯誤。如果是這樣，我做了兩次。
如上所述，如你所見。 這段代碼非常非常簡單。唯一複雜的是班級。即使我將它改爲一個非常非常簡單的類，我也會得到相同的異常。
有什麼想法嗎？
你有沒有想過這個？我遇到了同樣的問題。 – 2010-11-02 14:34:02
你有一些課程來標記公衆（或內部也許）嗎？ http://2bhere4u.blogspot.com/2010/01/nhibernatemappingexception-no-persister.html – 2011-05-02 20:29:57
我認爲它可能是'返回type.Namespace ==「System.Xml.XmlAttribute」'。其缺失的|| type.Namespace ==「PROJECTLIB」' – Firo 2011-07-25 13:17:35