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POReturn class from nested collection using NHibernate
 

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    <p>Doman:</p> <pre><code>class Action Products: IList of class ActionProducts: Category: class Category Products: IList of class Product </code></pre> <p>Now, I want this:</p> <pre><code> var products = from a in Session.Linq&lt;Action&gt;() from ap in a.Products from p in ap.Category.Products where a.Name == name select p; </code></pre> <p>And this Linq actually works but: 1. produces select for all tables instead of only Products 2. produces left outer joins, not inner 3. Distinct() on the query doesn't work (though ToList().Distinct() works).</p> <p>Also can be done with SelectMany(a => a.Products).SelectMany(ap => ap.Category.Products) but it doesn't work at all with current NHibernate.Linq.</p> <p>So I want to use ICriteria. But I can't see how do I return product, not action?</p> <pre><code> ICriteria criteria = Session.CreateCriteria(typeof(Action)) .Add(Expression.Eq("Name", name)) .CreateAlias("Products", "ap") .CreateAlias("ap.Category.Products", "p") .SomehowReturnMeOnly("p"); </code></pre> <p>So how do I SomehowReturnMeOnly("p")? So that I can do</p> <pre><code>return criteria.List&lt;Product&gt;(); </code></pre> <p>which will fail because ICriteria selects Actions, not Products?</p> <p>I may consider HQL but I actually doesn't like string queries... Just for example, here's the HQL that works and produces exactly the SQL that I need:</p> <pre><code> IQuery query = Session.CreateQuery("select distinct p from Action a inner join a.Products as ap inner join ap.Category.Products as p"); return query.List&lt;Product&gt;(); </code></pre>
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