C# Nhibernate 3中的一对一映射
我有以下课程C# Nhibernate 3中的一对一映射,c#,nhibernate,nhibernate-mapping,one-to-one,C#,Nhibernate,Nhibernate Mapping,One To One,我有以下课程 namespace Extractor.Mapping { public class Application { public virtual Guid Id { get; set; } public virtual string intId { get; set; } virtual SQuery sQuery { get; set; } } } namespace Extractor.Mapping {
namespace Extractor.Mapping
{
public class Application
{
public virtual Guid Id { get; set; }
public virtual string intId { get; set; }
virtual SQuery sQuery { get; set; }
}
}
namespace Extractor.Mapping
{
public class SQuery
{
public virtual int Id { get;set; }
public virtual Guid Application { get;set; }
public virtual string Type { get;set; }
}
}
SQuery和Application之间的关系是SQuery中名为“Application”的FK
这些是de hbm文件
Application.hbm.xml
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
assembly="Extractor"
namespace="Extractor.Mapping">
<class name="Application" >
<id name="Id" column="Id">
<generator class="assigned"/>
</id>
<property name = "intId" column = "IntId" type = "string"/>
<one-to-one name="sQuery" property-ref ="Application" class="SicQuery"/>
</class>
</hibernate-mapping>
<?xml version="1.0" encoding="utf-8" ?>
我试着这样到达那里:
ICriteria crit = session.CreateCriteria(typeof(SQuery));
IList<SQuery> list = crit.List<SQuery>();
ICriteria crit=session.CreateCriteria(typeof(SQuery));
IList list=crit.list();
提前感谢一对一的要点是引用关系。这种映射不能是关于
值类型的映射
public class Application
{
public virtual SQuery sQuery { get; set; }
...
}
public class SQuery
{
// wrong, Guid is ValueType, not a reference
// public virtual Guid Application { get;set; }
// corrrect - one to one == bi-directional
public virtual Application Application { get;set; }
...
}
映射应该是这样的
<class name="Application" >
...
// class should be SQuery
//<one-to-one name="sQuery" property-ref ="Application" class="SicQuery"/>
<one-to-one name="sQuery" property-ref="Application" class="SQuery"/>
<class name="SQuery" >
...
<many-to-one name="Application" class="Application"
column="Application" unique="true"/>
...
//课堂应该整洁
//
...
请参阅此处的更多信息:
在这里你可以找到更多关于
public class Application
{
public virtual SQuery sQuery { get; set; }
...
}
public class SQuery
{
// wrong, Guid is ValueType, not a reference
// public virtual Guid Application { get;set; }
// corrrect - one to one == bi-directional
public virtual Application Application { get;set; }
...
}
<class name="Application" >
...
// class should be SQuery
//<one-to-one name="sQuery" property-ref ="Application" class="SicQuery"/>
<one-to-one name="sQuery" property-ref="Application" class="SQuery"/>
<class name="SQuery" >
...
<many-to-one name="Application" class="Application"
column="Application" unique="true"/>