I'm using nhibernate 1.0.1 and I'm not able to use the timestamp or version tags in my xml. I can declare my timestamp field like this:

<property name="LastUpdated" column="updated_dt" type="Timestamp"/>

but not like this:

<version name="LastUpdated" column="updated_dt" type="Timestamp"/>
<timestamp name="LastUpdated" column="updated_dt"/>

Of course, declaring it as a property doesn't do what I want it to do.

Here's the exception that version gives me (similar for <timestamp>):

{"NHibernate.MappingException exception was thrown : The element 'class' in namespace 'urn:nhibernate-mapping-2.0' has invalid child element 'version' in namespace 'urn:nhibernate-mapping-2.0'. List of possible elements expected: 'urn:nhibernate-mapping-2.0:property
urn:nhibernate-mapping-2.0:many-to-one
urn:nhibernate-mapping-2.0:one-to-one
urn:nhibernate-mapping-2.0:component
urn:nhibernate-mapping-2.0:dynamic-component
urn:nhibernate-mapping-2.0:any urn:nhibernate-mapping-2.0:map
urn:nhibernate-mapping-2.0:set urn:nhibernate-mapping-2.0:list
urn:nhibernate-mapping-2.0:bag urn:nhibernate-mapping-2.0:idbag
urn:nhibernate-mapping-2.0:array
urn:nhibernate-mapping-2.0:primitive-array
urn:nhibernate-mapping-2.0:subclass
urn:nhibernate-mapping-2.0:joined-subclass'."}

Am I missing something? I've looked high and low and can't figure it out. It works when I use NHibernate.Mapping.Attributes and put a timestamp or version attribute on the property. For some reason, however, it doesn't think either are in the XML schema when it parses my *.hbm.xml files. Any ideas?

pretty sure <version> is an Int32 and not a Timestamp. Being obvious, but you can't use both. One or the other. Either:


- or -



-devon

The <version> element needs to go above all your <property> elements in your mapping file. So directly below the <id> element (or the <discriminator> element if there is one).

Thanks baggins, that was the problem. I put it first and it works perfectly. Thanks also to devonl for the clarification on the differnce between timestamp and version.