Hi all, I am just beginning on NHibernate. I am excited about the potential, but I'm stumbling quite a bit on these first few 'hello world' tests and trials.

I keep getting the "in expected: (possibly an invalid or unmapped class name was used in the query)" exception. All the example HQL queries I've seen show that I should be able to just do a simple "from ClassName".

It seems my issue must be trivial, but I just can't pin-point it.

Hibernate version: 1.0.2

Mapping documents:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0"
namespace="NHibernate_QuickStart" assembly="NHibernate_QuickStart">

<class name="UploadedEventFiles" table="uploadedEventFiles">
<id name="UploadID" column="uploadID" sql-type="int" not-null="true">
<generator class="identity" />
</id>

<property name="OriginalFileName" column="originalFileName" sql-type="nvarchar(200)" not-null="true" />
<property name="UserID" column="userID" sql-type="int" not-null="true" />
<property name="RowCount" column="fileRowCount" sql-type="bigint" not-null="true" />
<property name="Status" column="status" sql-type="int" not-null="true" />
<property name="Errors" column="errors" sql-type="nvarchar(2000)" not-null="false" />
<property name="DateTimeAdded" column="dateTimeAdded" sql-type="smalldatetime" not-null="true" />
</class>

</hibernate-mapping>

Code between sessionFactory.openSession() and session.close():

IQuery query = sess.CreateQuery(" from UploadedEventFiles");

foreach (UploadedEventFiles f in query.Enumerable())
{
Response.Write("row " + f.UploadID + ": " + f.OriginalFileName + ", " + f.RowCount + "<br/>");
}

Full stack trace of any exception that occurs:

at NHibernate.Hql.FromParser.End(QueryTranslator q) at NHibernate.Hql.ClauseParser.End(QueryTranslator q) at NHibernate.Hql.PreprocessingParser.End(QueryTranslator q) at NHibernate.Hql.ParserHelper.Parse(IParser p, String text, String seperators, QueryTranslator q) at NHibernate.Hql.QueryTranslator.Compile() at NHibernate.Hql.QueryTranslator.Compile(ISessionFactoryImplementor factory, IDictionary replacements, Boolean scalar) at NHibernate.Impl.SessionFactoryImpl.GetQuery(String queryString, Boolean shallow) at NHibernate.Impl.SessionImpl.GetQueries(String query, Boolean scalar) at NHibernate.Impl.SessionImpl.Enumerable(String query, QueryParameters parameters) at NHibernate.Impl.QueryImpl.Enumerable() at NHibernate_QuickStart._Default.Page_Load(Object sender, EventArgs e) in C:\Documents and Settings\Mason Blake\My Documents\Visual Studio 2005\Projects\NHibernate_QuickStart\NHibernate_QuickStart\Default.aspx.cs:line 29


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

This is such a trivial issue, and nobody has any advice? I need some help - please!

The best advice I can give - make sure that the mapping files are loaded by NHibernate. This check should be obvious from the error, so that's proably the reason noone answers.

Gert

The error message means that NHibernate can't find the mapping file. The first thing to do is verify that the Build Action property on the mapping file is set to Embedded Resource.