我一直在尝试使用NHibernate(2.1.2.4000)和NHibernate.Mapping.Attributes(1.2.1.4000)将IDictionary映射到数据库但没有成功。我在网上发现了一些博客,提到可以映射到一个属性([1] [2]),但我似乎无法让它工作,因为我不断收到以下错误:
映射泛型集合的错误FormsEntity.Attributes:期望1个泛型参数,但属性类型有2个
属性属性如下所示:
[Map(2, Name = "Attributes", Cascade = CascadeStyle.All)]
[Key(3, Column = "FormsEntityID")]
[Index(4, Column = "Name", Type = "string")]
[CompositeElement(5, ClassType=typeof(HtmlAttribute))]
public virtual IDictionary<string, HtmlAttribute> Attributes
{
get { return _attributes; }
set { _attributes = value; }
}
然后生成以下.hbm文件:
<hibernate-mapping auto-import="false" xmlns="urn:nhibernate-mapping-2.2">
<joined-subclass name="FormsEntity, Entities" extends="BaseEntity, Entities"
table="CMS_FormsEntity ">
<key column="Id" />
<property name="Title" />
<property name="Description">
<column name="description" sql-type="nvarchar(MAX)" />
</property>
<property name="IsTemplate" />
<map name="Attributes" cascade="all">
<key column="FormsEntityID" />
<index column="Name" type="string" />
<composite-element class="HtmlAttribute, Entities" />
</map>
</joined-subclass>
</hibernate-mapping>
使用的资源:
我读过的其他帖子
答案 0 :(得分:0)
您需要指定如何在复合元素上映射属性:
<map name="Attributes" cascade="all">
<key column="FormsEntityID" />
<index column="Name" type="string" />
<composite-element class="HtmlAttribute, Entities">
<property name="Name" />
<property name="Value" />
</composite-element>
</map>
用你的财产名称代替。