NHibernate:来自表X的关联引用了一个未映射的类:X

Question

我有两个映射文件，分别对应于order和customer对象。

客户映射：

  <class name="OODB.Domain.Customer, OODB.Domain" entity-name="Customers">
     <id name="ID" column="customer_id">
      <generator class="guid" />
     </id>
     <property name="FirstName" column="first_name"/>
     <property name="LastName" column="last_name"/>
     <property name="EMail" column="email"/>
     <property name="Telephone" column="telephone" />

    <component name="Address" class="Address">
       <property name="Street" column="street"></property>
       <property name="PostalCode" column="postal_code"></property>
       <property name="City" column="city"></property>
    </component>
  </class>
 </hibernate-mapping>

订单映射：

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="OODB.Domain"   namespace="OODB.Domain">  
  <class name="OODB.Domain.CustomerOrder, OODB.Domain" entity-name="Orders">
    <id name="ID" column="order_id">
      <generator class="guid"></generator>
    </id>
    <property name="OrderNo" column="order_no" length="8" not-null="true"></property>
    <property name="Status" column="status" not-null="true"></property>
    <many-to-one name="Orderer" class="Customer" column="customer_id" insert="true" not-found="exception" fetch="join"/>
  </class>
</hibernate-mapping>

Customer类：

namespace OODB.Domain
{
    public class Customer : ModelBase<Customer>
    {
        public virtual string FirstName
        {
            get;
            set;
        }

        public virtual string LastName
        {
            get;
            set;
        }

        public virtual string EMail
        {
            get;
            set;
        }

        public virtual string Telephone
        {
            get;
            set;
        }

        public virtual Address Address
        {
            get;
            set;
        }

...
}

客户订单类：

public class CustomerOrder : ModelBase<CustomerOrder>
{
    public virtual string OrderNo
    {
        get;
        set;
    }

    public virtual Customer Orderer
    {
        get;
        set;
    }

    public virtual OrderStatus Status
    {
        get;
        set;
    }
...
}

如果我去掉多对一的东西，一切都很好用(Mappings被集成为嵌入式资源。我已经检查过两次了。)否则，我会得到一个错误：“来自表Orders的关联引用了一个未映射的类:OODB.Domain.Customer”。但是客户对象被映射了.我错过了什么？

Answer 1

我混淆了class元素上的table和entity-name属性。:\

Answer 2

我对您的示例的猜测是：many-to-one元素中的“类”规范必须与其他class规范具有相同的详细程度。特别是，您必须包括程序集。

<many-to-one name="Orderer" class="OODB.Domain.Customer, OODB.Domain" column="customer_id" insert="true" not-found="exception" fetch="join"/>

Answer 3

此异常的一个可能原因是.html文件不是“嵌入式资源”。如果映射文件(hbm)不在正确的目录中，则此异常。如果您查看输出窗口，您将看到类似以下内容：

NHibernate.Cfg.Configuration: ERROR lambda_method - An association from the table
SubsequentReportDetail refers to an unmapped class: NS.Project.Data.Domain.Class
NHibernate.MappingException: An association from the table X refers to an 
unmapped class:  NS.Project.Data.Domain.Class