带接口的 ActiveRecord 崩溃

Question

我在使用 ActiveRecord 和接口时遇到问题。当我在没有接口的情况下使用它时，一切都正常，但是当我将它与接口一起使用时，它有时起作用，有时不起作用，而且非常随机。如果它有效，它将继续工作，直到在我的项目中的某个地方进行一些更改并重新编译。然后，如果它停止工作，除非我再次进行一些不相关的更改并重新编译，否则它不会工作。 你可以在下面看到我的模型。您知道我该如何解决这个问题吗？

    [ActiveRecord]
    public class ContactInformation : ActiveRecordValidationBase<ContactInformation>
    {
        public ContactInformation()
        {
            Emails = new List<Email>();
}
        [PrimaryKey]
        public int Id { get; set; }
        [HasMany(typeof(Email), Cascade = ManyRelationCascadeEnum.AllDeleteOrphan, "type='1'")]
        private IList<Email> Emails { get; set; }



   [ActiveRecord("Details",
    DiscriminatorColumn = "int",
    DiscriminatorType = "type",
    DiscriminatorValue = "1")]
    public class Email : Detail<Email>

   [ActiveRecord("Details",
    DiscriminatorColumn = "int",
    DiscriminatorType = "type",
    DiscriminatorValue = "0")]
public class Detail<T> : ActiveRecordValidationBase<T>, IDetail where T : class
{
    [PrimaryKey]
    public int Id { get; set; }

    [BelongsTo]
    public ContactInformation ParentContactInformation { get; set; }

public interface IDetail
{
    int Id { get; set; }
    ContactInformation ParentContactInformation { get; set; } 
}

以下例外：

SetUp : System.NullReferenceException : Object reference not set to an instance of an object.
at Castle.ActiveRecord.Framework.Internal.XmlGenerationVisitor.WriteCompositeColumns(String[] columns)
at Castle.ActiveRecord.Framework.Internal.XmlGenerationVisitor.WriteCollection(ManyRelationCascadeEnum cascadeEnum, Type targetType, RelationType type, String name, String accessString, String table, String schema, Boolean lazy, Boolean inverse, String orderBy, String where, String sort, String columnKey, String[] compositeKeyColumnKeys, String element, Type elementType, String columnRef, String[] compositeKeyColumnRefs, IVisitable extraModel, String index, String indexType, CacheEnum cache, String cacheregion, NotFoundBehaviour notFoundBehaviour, FetchEnum fetch, Int32 batchSize, Type collectionType)
at Castle.ActiveRecord.Framework.Internal.XmlGenerationVisitor.VisitHasMany(HasManyModel model)
at Castle.ActiveRecord.Framework.Internal.HasManyModel.Accept(IVisitor visitor)
at Castle.ActiveRecord.Framework.Internal.AbstractDepthFirstVisitor.VisitNodes(IEnumerable nodes)
at Castle.ActiveRecord.Framework.Internal.XmlGenerationVisitor.VisitModel(ActiveRecordModel model)
at Castle.ActiveRecord.Framework.Internal.XmlGenerationVisitor.CreateXml(ActiveRecordModel model)
at Castle.ActiveRecord.ActiveRecordStarter.AddXmlToNHibernateCfg(ISessionFactoryHolder holder, ActiveRecordModelCollection models)
at Castle.ActiveRecord.ActiveRecordStarter.RegisterTypes(ISessionFactoryHolder holder, IConfigurationSource source, IEnumerable`1 types, Boolean ignoreProblematicTypes)
at Castle.ActiveRecord.ActiveRecordStarter.Initialize(IConfigurationSource source, Type[] types)
at Castle.ActiveRecord.ActiveRecordStarter.Initialize(Assembly[] assemblies, IConfigurationSource source, Type[] additionalTypes)
at Castle.ActiveRecord.ActiveRecordStarter.Initialize(Assembly assembly, IConfigurationSource source)
at tests.Framework.ModelTests.SetUpFixture() in ModelTests.cs: line 18 

这是我的 SetUpFixture

[TestFixtureSetUp]
public void SetUpFixture()
{
    if (ActiveRecordStarter.IsInitialized) return;

    IConfigurationSource source = ActiveRecordSectionHandler.Instance;
    ActiveRecordStarter.Initialize(Assembly.Load("Model"), source);
    XmlConfigurator.Configure();
}

我检查了生成的文件，详细信息文件具有此文件名 Detail`1.hbm.xml 反引号和此内容：

<?xml version="1.0" encoding="utf-16"?>
<hibernate-mapping  auto-import="true" default-lazy="false" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:nhibernate-mapping-2.2">
  <class name="Model.Contact.Detail`1, Model" table="Details" discriminator-value="0">
    <id name="Id" access="property" column="Id" type="Int32" unsaved-value="0">
      <generator class="native">
      </generator>
    </id>
    <discriminator column="type" type="int" />

    <property name="Owner" access="property" type="String">
      <column name="Owner"/>
    </property>
    <property name="Location" access="property" type="String">
      <column name="Location"/>
    </property>
    <property name="ContactDetail" access="property" type="String">
      <column name="ContactDetail"/>
    </property>
    <many-to-one name="ParentContactInformation" access="property" class="Model.ContactInformation,Model" column="ParentContactInformation" lazy="proxy" />
    <subclass name="Model.Contact.Email, Model" discriminator-value="3">
    </subclass>
    <subclass name="Model.Contact.Phone, Model" discriminator-value="1">
    </subclass>
    <subclass name="Model.Contact.Fax, Model" discriminator-value="2">
    </subclass>
  </class>
</hibernate-mapping>

Answer 1

问题是您正在尝试映射具有未定义类型参数的类（即开放泛型类）。您需要映射具体的类。有关详细信息，请参阅此内容：

• 使用 NHibernate 映射通用类
• http://ayende.com/Blog/archive/2007/11/14 /NHibernate-and-Generic-Entities.aspx

Answer 2

因此，经过一些测试后，我发现我可以使用泛型类。问题是，

[BelongsTo]
public ContactInformation ParentContactInformation { get; set; }

由于某种原因，我必须从 Detail 类移动到子类（电子邮件），BelongsTo 需要位于子类中。