Hi, i'm a newbie and i'm using nhiberante.
i have a database with 5-6 tables. I map the tables and corrected all
of the notisable errors.
I have this error when I run the application:
Unknown entity class: NHibernate.Impl.SessionImpl
the code that creates the error:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using NHibernate;
using MRI_CBIR_DAL.ClassMappings;
namespace MRI_CBIR
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ISession ssn = ProjectConfiguration.GetCurrentSession();
ITransaction tx = ssn.BeginTransaction();
DescriptorType s = new DescriptorType();
s.Type = "random";
ssn.Save(ssn);
tx.Commit();
ProjectConfiguration.CloseSession();
}
}
}
The error is generated on: ssn.Save(ssn);
This happens for several tables.
The *.cs file looks like this:
using System;
using System.Collections.Generic;
using System.Text;
using NHibernate;
using System.Collections;
namespace MRI_CBIR_DAL.ClassMappings
{
/// <summary>
/// Class representing the Type of Descriptor record
/// mapped to the table DESCRIPTOR_TYPE
/// </summary>
public class DescriptorType
{
/// <summary>
/// The Id of the descriptorType
/// </summary>
private long id;
/// <summary>
/// The value of the descriptor Type
/// </summary>
private string type;
/// <summary>
/// The Descriptors of of the type
/// </summary>
private IDictionary descriptors;
/// <summary>
/// Empty constructor for the NHibernate mapping
/// </summary>
public DescriptorType()
{ }
/// <summary>
/// Getter and Setter for the Id
/// </summary>
public virtual long Id
{
set { id = value; }
get { return id; }
}
/// <summary>
/// Getter and Setter for the descriptor Type
/// </summary>
public virtual string Type
{
set { type = value; }
get { return type; }
}
/// <summary>
/// Getter and Setter for the descriptors
/// </summary>
public virtual IDictionary Descriptors
{
set { descriptors = value; }
get { return descriptors; }
}
}
}
and the hbm.xml is:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="MRI_CBIR_DAL.ClassMappings" assembly="MRI_CBIR_DAL">
<class name="DescriptorType" table="DESCRIPTOR_TYPE">
<id name="Id">
<column name="ID" not-null="true"/>
<generator class="native" />
</id>
<property name="Type">
<column name="TYPE" not-null="true"/>
</property>
<set name="Descriptors">
<key column="descriptorID" />
<one-to-many class="MRI_CBIR_DAL.ClassMappings.Descriptor,
MRI_CBIR_DAL" />
</set>
</class>
</hibernate-mapping>
The table in the database is simpe : two fields Id and Type and looks
like this:
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID
(N'[dbo].[DESCRIPTOR]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[DESCRIPTOR](
[ID] [int] IDENTITY(1,1) NOT NULL,
[VALUE] [nvarchar](max) NOT NULL,
[IMAGE_ID] [int] NOT NULL,
[DESC_TYPE_ID] [int] NOT NULL,
CONSTRAINT [PK_DESCRIPTOR] PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (PAD_INDEX = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
I have two projects, one for the presentation layer and one is the
data layer.
The hibernate.cfg.xml is in the root of the data access layer project
and looks like this:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<section name="hibernate-configuration"
type="NHibernate.Cfg.ConfigurationSectionHandler, NHibernate" />
<!-- <section name="log4net"
type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" /
> -->
</configSections>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
<session-factory>
<property name="dialect">NHibernate.Dialect.MsSql2005Dialect</
property>
<property
name="connection.driver_class">NHibernate.Driver.SqlClientDriver</
property>
<property
name="connection.provider">NHibernate.Connection.DriverConnectionProvider</
property>
<!--<property name="connection.connection_string">Server=
(local);database=MRI_DATABASE-ica;Integrated Security=SSPI</property>--
>
<property name="connection.connection_string">Data Source=DAEMIAN
\SQLEXPRESS;Initial Catalog=MRI_DATABASE-ica;Integrated Security=True</
property>
<property name="show_sql">true</property>
<!--<mapping assembly="MRI_CBIR_DAL" /> -->
<mapping
resource="MRI_CBIR_DAL.ClassMappings.Descriptor.hbm.xml"
assembly="MRI_CBIR_DAL" />
<mapping
resource="MRI_CBIR_DAL.ClassMappings.DescriptorType.hbm.xml"
assembly="MRI_CBIR_DAL" />
<mapping resource="MRI_CBIR_DAL.ClassMappings.MRIClass.hbm.xml"
assembly="MRI_CBIR_DAL" />
<mapping
resource="MRI_CBIR_DAL.ClassMappings.MRImageBase.hbm.xml"
assembly="MRI_CBIR_DAL" />
<mapping resource="MRI_CBIR_DAL.ClassMappings.MRISet.hbm.xml"
assembly="MRI_CBIR_DAL" />
<mapping
resource="MRI_CBIR_DAL.ClassMappings.SimilarityMeasure.hbm.xml"
assembly="MRI_CBIR_DAL" />
<mapping
resource="MRI_CBIR_DAL.ClassMappings.SimilarityMeasureType.hbm.xml"
assembly="MRI_CBIR_DAL" />
</session-factory>
</hibernate-configuration>
<log4net>
<appender name="ConsoleAppender"
type="log4net.Appender.ConsoleAppender, log4net">
<layout type="log4net.Layout.PatternLayout, log4net">
<param name="ConversionPattern" value="%m" />
</layout>
</appender>
<root>
<priority value="WARN" />
<appender-ref ref="ConsoleAppender" />
</root>
</log4net>
</configuration>
I have embedded all the hbm.xml files.
can you tell me what is the problem?!?!?
Thanks in advance,
Joksim
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