From b451cd5aef8543caac0b9c0514687b8323cd1942 Mon Sep 17 00:00:00 2001
From: mgravell <none@none>
Date: Mon, 6 Jun 2011 10:31:37 +0100
Subject: [PATCH] SO parent child example

---
 Tests/Tests.cs | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/Tests/Tests.cs b/Tests/Tests.cs
index 25e42f2..5153c6c 100644
--- a/Tests/Tests.cs
+++ b/Tests/Tests.cs
@@ -686,7 +686,36 @@ public void TestDapperSetsPrivates()
         {
             connection.Query<PrivateDan>("select 'one' ShadowInDB").First().Shadow.IsEqualTo(1);
         }
-        
+
+        class Parent
+        {
+            public int Id { get; set; }
+            public readonly List<Child> Children = new List<Child>();
+        }
+        class Child
+        {
+            public int Id { get; set; }
+        }
+        public void ParentChildIdentityAssociations()
+        {
+            var lookup = new Dictionary<int, Parent>();
+            var parents = connection.Query<Parent, Child, Parent>(@"select 1 as [Id], 1 as [Id] union all select 1,2 union all select 2,3 union all select 1,4 union all select 3,5",
+                (parent, child) =>
+                {
+                    Parent found;
+                    if (!lookup.TryGetValue(parent.Id, out found))
+                    {
+                        lookup.Add(parent.Id, found = parent);
+                    }
+                    found.Children.Add(child);
+                    return found;
+                }).Distinct().ToDictionary(p => p.Id);
+            parents.Count().IsEqualTo(3);
+            parents[1].Children.Select(c => c.Id).SequenceEqual(new[] { 1,2,4}).IsTrue();
+            parents[2].Children.Select(c => c.Id).SequenceEqual(new[] { 3 }).IsTrue();
+            parents[3].Children.Select(c => c.Id).SequenceEqual(new[] { 5 }).IsTrue();
+        }
+
         /* TODO:
          * 
         public void TestMagicParam()
-- 
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