Syntax to define a NHibernate Filter with Fluent Nhibernate

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It seems I can't find the correct syntax to define a nhibernate filter using fluent Nhibernate.

I'm trying to follow this ayende's blogpost:

http://ayende.com/Blog/archive/2006/12/26/LocalizingNHibernateContextualParameters.aspx

I defined the formula on my property with .FormulaIs() method but can't find on google how to translate this definition to fluent nhibernate:

 < filter-def name='CultureFilter'>
   < filter-param name='CultureId' type='System.Int32'/>
 < /filter-def>

Best Answer

If you build Fluent from source, there is now support for filters. You use them like this:

First create a class inheriting from FluentNHibernate.Mapping.FilterDefinition:

using FluentNHibernate.Mapping;

namespace PonyApp.FluentFilters
{
    public class PonyConditionFilter : FilterDefinition
    {
        public PonyConditionFilter()
        {
            WithName("PonyConditionFilter")
                .AddParameter("condition",NHibernate.NHibernateUtil.String);
        }
    }
}

In your ClassMap for your class, use the ApplyFilter method:

namespace PonyApp.Entities.Mappings
{
    public class PonyMap : ClassMap<Pony>
    {
        public PonyMap()
        {
            Id(x => x.Id);
            Map(x => x.PonyName);
            Map(x => x.PonyColor);
            Map(x => x.PonyCondition);
            ApplyFilter<PonyConditionFilter>("PonyCondition = :condition");
        }
    }
}

Then add the filter to your fluent config:

Fluently.Configure()
    .Mappings(m => m.FluentMappings.Add(typeof(PonyConditionFilter)))
    //blah blah bunches of other important stuff left out
    .BuildSessionFactory();

Then you can turn it on and off just as you would with vanilla NHibernate:

session.EnableFilter("PonyConditionFilter").SetParameter("condition","Wonderful");
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