NHibernate 映射错误与 v4.0

Question

我正在使用 VS 2013 32 位，nHibernate v4.0.0.4000。我是 nHiberNate 的新手，无论如何我可以避免在不使用流利的情况下创建映射。我需要很好的工作样本，但我目前找不到。

我收到以下代码的错误。

Additional information: Could not compile the mapping document: C:\Project...\Some\Models\NHibernate\Mappings\SomeInfo.hbm.xml

InnerException: {"Problem trying to set property type by reflection"}

代码与映射 -----

My class:
namespace Some.Models
{
    public class SomeInfo 
    {
        public long     Form_Id { get; set; }   
        public string   Account_Id { get; set; } 
        public char     Entity { get; set; }
        public string   Name { get; set; }
        public decimal  Ownership_Percent { get; set; } 
    }
}

映射实例创建：

namespace Some.Models
{
    public class Hibernate_Connection
    {
        ISessionFactory sessionFactory;        
        ISession OpenSession()
        {
            if (sessionFactory == null)
            {
                var cgf = new Configuration();
                var data = cgf.Configure(HttpContext.Current.Server.MapPath(@"Models\NHibernate\Configuration\hibernate.cfg.xml"));
                cgf.AddDirectory(new System.IO.DirectoryInfo(HttpContext.Current.Server.MapPath(@"Models\NHibernate\Mappings")));
                sessionFactory = data.BuildSessionFactory();
            }
            return sessionFactory.OpenSession();
        }

映射：Models/NHiberNate/Mappings/SomeInfo.hbm.xml

<?xml version="1.0" encoding="utf-8" ?> 
<hibernate-mapping 
xmlns="urn:nhibernate-mapping-2.2" 
assembly="Some" 
namespace="Some.Models" 
auto-import="true"> 
<class name="SomeInfo" table="Some_Table" lazy="false"> 
  <!--<id name="ID" column="Form_Id" Type="Long">
       <generator class="native"></generator> </id>-->
  <id name="ID" column="Form_Id"> 
     <generator class="native"></generator> 
  </id>
  <property name="Form_Id" column="Form_Id"></property> 
  <property name="Account_Id" column="Account_Id"></property> 
  <property name="Entity" column="Entity"></property> 
  <property name="Name" column="Name"></property>   
  <property name="Ownership_Percent" access="property" 
            column="Ownership_Percent" type="Decimal"></property> 
</class> 
</hibernate-mapping>

Answer 1

您的模型属性需要是虚拟的：

    public class SomeInfo 
    {
        public virtual long     Form_Id { get; set; }   
        public virtual string   Account_Id { get; set; } 
        public virtual char     Entity { get; set; }
        public virtual string   Name { get; set; }
        public virtual decimal  Ownership_Percent { get; set; } 
    }

Answer 2

我想如果您提供完整的异常，我们将看到 （在堆栈跟踪中） 消息如下：

... Could not find a getter for property 'ID' in class 'Some.Models.SomeInfo' ...

因为映射指示 NHibernate 映射 C# 属性 ID

<id name="ID" column="Form_Id"> 
  <generator class="native"></generator> 
</id>

并且没有属性ID。此外，还有同一列的第二个映射 Form_Id

<property name="Form_Id" column="Form_Id"></property>

这不应该是这样的。我们应该将 one 列映射到 one 属性。所以，这个映射应该有效

<class name="SomeInfo" table="Some_Table" lazy="false"> 
  <id name="Form_Id" column="Form_Id"> 
     <generator class="native"></generator> 
  </id>
  <property name="Account_Id" column="Account_Id"></property> 
  ...
</class>

NHibernate 映射错误与 v4.0

NHibernate Mapping Error with v4.0

c#

nhibernate

nhibernate-mapping