Question

I am using many classes per table mapping(subclasses with discriminator).
Is there a way to turn on second level caching for specific subclass only ?
NHibernate version is 3.1.0

If I put the tag <cache usage="read-only"/> right after the subclass tag, I get error at runtime(tells that cache is invalid child element for element subclass).

<class name="MyDomain.ParentClass, MyDomain" table="MyDomainClass">    
    <subclass name="MyDomain.SubClass, MyDomain"  discriminator-value="SubClass">    
    </subclass>    
</class>

Answer 1

NHibernate documentation (ch. 25.1) says:

Add <cache usage=”read-write|nonstrict-read-write|read-only”/> (just after <class>) in the mapping of the entities you want to cache. It also works for collections (bag, list, map, set, …).

So, sadly, no subclass.