Fix Linq Fetch/FetchMany after SelectMany method

Author: maca88

src/NHibernate.Test/Async/Linq/EagerLoadTests.cs

@@ -34,6 +34,48 @@ public async Task CanSelectAndFetchAsync()
 			Assert.IsTrue(NHibernateUtil.IsInitialized(result[0].Orders));
 		}
 
+		[Test]
+		public async Task CanSelectAndFetchManyAsync()
+		{
+			var result = await (db.OrderLines
+							.Select(o => o.Product)
+							.FetchMany(o => o.OrderLines)
+							.ToListAsync());
+
+			session.Close();
+
+			Assert.IsNotEmpty(result);
+			Assert.IsTrue(NHibernateUtil.IsInitialized(result[0].OrderLines));
+		}
+
+		[Test]
+		public async Task CanSelectManyAndFetchAsync()
+		{
+			var result = await (db.Orders
+							.SelectMany(o => o.OrderLines)
+							.Fetch(o => o.Product)
+							.ToListAsync());
+
+			session.Close();
+
+			Assert.IsNotEmpty(result);
+			Assert.IsTrue(NHibernateUtil.IsInitialized(result[0].Product));
+		}
+
+		[Test]
+		public async Task CanSelectManyAndFetchManyAsync()
+		{
+			var result = await (db.Employees
+							.SelectMany(o => o.Orders)
+							.FetchMany(o => o.OrderLines)
+							.ToListAsync());
+
+			session.Close();
+
+			Assert.IsNotEmpty(result);
+			Assert.IsTrue(NHibernateUtil.IsInitialized(result[0].OrderLines));
+		}
+
 		[Test]
 		public async Task CanSelectAndFetchHqlAsync()
 		{

src/NHibernate.Test/Linq/EagerLoadTests.cs

@@ -23,6 +23,48 @@ public void CanSelectAndFetch()
 			Assert.IsTrue(NHibernateUtil.IsInitialized(result[0].Orders));
 		}
 
+		[Test]
+		public void CanSelectAndFetchMany()
+		{
+			var result = db.OrderLines
+							.Select(o => o.Product)
+							.FetchMany(o => o.OrderLines)
+							.ToList();
+
+			session.Close();
+
+			Assert.IsNotEmpty(result);
+			Assert.IsTrue(NHibernateUtil.IsInitialized(result[0].OrderLines));
+		}
+
+		[Test]
+		public void CanSelectManyAndFetch()
+		{
+			var result = db.Orders
+							.SelectMany(o => o.OrderLines)
+							.Fetch(o => o.Product)
+							.ToList();
+
+			session.Close();
+
+			Assert.IsNotEmpty(result);
+			Assert.IsTrue(NHibernateUtil.IsInitialized(result[0].Product));
+		}
+
+		[Test]
+		public void CanSelectManyAndFetchMany()
+		{
+			var result = db.Employees
+							.SelectMany(o => o.Orders)
+							.FetchMany(o => o.OrderLines)
+							.ToList();
+
+			session.Close();
+
+			Assert.IsNotEmpty(result);
+			Assert.IsTrue(NHibernateUtil.IsInitialized(result[0].OrderLines));
+		}
+
 		[Test]
 		public void CanSelectAndFetchHql()
 		{

src/NHibernate/Linq/Visitors/ResultOperatorProcessors/ProcessFetch.cs

@@ -13,8 +13,9 @@ public void Process(FetchRequestBase resultOperator, QueryModelVisitor queryMode
 			var querySource = QuerySourceLocator.FindQuerySource(
 				queryModelVisitor.Model,
 				resultOperator.RelationMember.DeclaringType);
+			var name = queryModelVisitor.VisitorParameters.QuerySourceNamer.GetName(querySource);
 
-			Process(resultOperator, queryModelVisitor, tree, querySource.ItemName);
+			Process(resultOperator, queryModelVisitor, tree, name);
 		}
 
 		public void Process(FetchRequestBase resultOperator, QueryModelVisitor queryModelVisitor, IntermediateHqlTree tree, string sourceAlias)