Nhibernate Get and Load

I'm fixing my codebase using NHibernate and I figured out that instead of using Get or Load to look up objects by ID, they used a query.

Like:

session.CreateCriteria(typeof(T)).Add(Expression.AllEq(propertyNameValues)).List<T>();

where propertyNameValues ​​is an identifier containing an "ID" and an id value.

Trying to replace it with:

session.Get<T>(id);

Nhibernate is throwing No Persister for my class.

But apparently one of them works, my google-fu found links only where people forgot to specify a given hbm for inline resources or a mapping assembly in nhibernate config.

I tried Get (id), Get (typeof (T), id), Get ("ClassName", id) all throwing the same error.

Here is the mapping as requested (thanks)

<class name="Domain.Customers.Customer, Domain" table="Customer" lazy ="true">
    <id name="ID" column="id" access="field.lowercase-underscore" type="int">
        <generator class="identity" />
    </id>

      

        
        
        
      

    

This is one class mapping, but it is common to all of my entitites.

Thanks for any pointer.