access attribute and mapping file issue? simple hbm

kellygreer1 · **Posted:** Fri Sep 14, 2007 9:11 pm

New to NHibernate. Trying to get a project up and running. I am running into one snag with configuration. I have a very simple hbm file (below). When I try to run my code I get the errors (below). The errors make it seem like NHibernate is ignoring my 'access' attribute on my properties. Seems like it is trying to use a default (getters/setters). How did I fix this? Or how do I even begin to troubleshoot this?

Thanks,
kellygreer1

Hibernate version:
NHibernate 2.2
Mapping documents:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
namespace="Doa.Domain.Entities" assembly="Doa.Domain">
<class name="Profile" table="Profiles">
<id name="Id" column="id" type="Int32" unsaved-value="-1"
access="field.camelcase-underscore">
<generator class="native" />
</id>
<property name="UserName" column="ntlogon" type="string" length="24" access="field.camelcase-underscore">
</property>
<property name="LastName" column="last_name" type="string" length="18" access="field.camelcase-underscore">
</property>
<property name="FirstName" column="first_name" type="string" length="18" access="field.camelcase-underscore">
</property>
<property name="MiddleName" column="middle_name" type="string" length="18" access="field.camelcase-underscore">
</property>
</class>
</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():
I'm just using a response.write to try to write the lastname from the Profile object. The code breaks before this on:
ISessionFactory factory = cfg.BuildSessionFactory();

Full stack trace of any exception that occurs:
The following types may not be used as proxies:
Doa.Domain.Entities.Profile: method set_UserName should be virtual
Doa.Domain.Entities.Profile: method set_LastName should be virtual
Doa.Domain.Entities.Profile: method set_Id should be virtual
Doa.Domain.Entities.Profile: method get_MiddleName should be virtual
Doa.Domain.Entities.Profile: method get_UserName should be virtual
Doa.Domain.Entities.Profile: method set_FirstName should be virtual
Doa.Domain.Entities.Profile: method get_Id should be virtual
Doa.Domain.Entities.Profile: method get_FirstName should be virtual
Doa.Domain.Entities.Profile: method get_LastName should be virtual
Doa.Domain.Entities.Profile: method set_MiddleName should be virtual

Name and version of the database you are using:
SQL Server 2000

karlchu · **Posted:** Fri Sep 14, 2007 10:23 pm

Code:

Doa.Domain.Entities.Profile: method set_UserName should be virtual
...

Make the properties virtual.

kellygreer1 · **Posted:** Fri Sep 14, 2007 11:16 pm

So even though the error is speaking about Methods the problem is with my Properties? I don't remember running into this last time I took NHibernate for a test drive about a year ago.

I'll try this when I get back to the office tomorrow.
I'll follow up with the results.

Thanks,
kellygreer1

karlchu · **Posted:** Sat Sep 15, 2007 12:07 am

Properties in .net are just syntactical sugar; they ultimately get translated to methods:

Code:

public string Username {
    get { ... }
    set { ... }
}

becomes

Code:

public string get_Username() { ... }
public void set_Username(string value) { ... }

You would not have gotten this error a year ago in NHibernate 1.0 because in NHibernate 1.2, the default changed to lazy="true" for all classes. As a result, all methods and properties in a mapped class must be virtual unless you explicitly set lazy="false"; or you specify something else (such as an interface) as its proxy.