Eager loading with HQL

In this recipe, we'll show you how to use HQL queries to eager load the child collections of our query results.

Getting ready

Complete the Getting Ready section at the beginning of this chapter.

How to do it…

1. Create a new folder named EagerLoadingWithHql in the project.

2. Add a new class named Recipe to the folder:

   using NH4CookbookHelpers.Queries;
   using NH4CookbookHelpers.Queries.Model;
   using NHibernate;
   
   namespace QueryRecipes.EagerLoadingWithHql
   {
       public class Recipe : QueryRecipe
       {
           protected override void Run(ISession session)
           {
               var book = session.CreateQuery(@"
                     from Book b
                     left join fetch b.Publisher")
                    .UniqueResult<Book>();
   
               Show("Book:", book);
   
               var movies = session.CreateQuery(@"
                     from Movie m
                     left join fetch m.Actors")
                 .SetResultTransformer(
   Transformers.DistinctRootEntity)
                 .List<Movie...