Add ParentChildCyclicalExample test

Author: mythz

tests/ServiceStack.OrmLite.Tests/ServiceStack.OrmLite.Tests.csproj

@@ -254,6 +254,7 @@
     <Compile Include="UseCase\CustomerOrdersUseCase.cs" />
     <Compile Include="UseCase\FieldFromInterfaceImplementationUseCase.cs" />
     <Compile Include="UseCase\NestedComplexTypeUseCase.cs" />
+    <Compile Include="UseCase\ParentChildCyclicalExample.cs" />
     <Compile Include="UseCase\SchemaUseCase.cs" />
     <Compile Include="UseCase\ServiceStack_OrmLite_UseCase.cs" />
     <Compile Include="UseCase\ShardingUseCase.cs" />

tests/ServiceStack.OrmLite.Tests/UseCase/ParentChildCyclicalExample.cs

@@ -0,0 +1,67 @@
+using System.Collections.Generic;
+using NUnit.Framework;
+using ServiceStack.DataAnnotations;
+using ServiceStack.Text;
+
+namespace ServiceStack.OrmLite.Tests.UseCase
+{
+    public class Parent
+    {
+        [AutoIncrement]
+        public int Id { get; set; }
+
+        public string Name { get; set; }
+
+        // the item currently published, modelled like an EF navigation property
+        [Reference]
+        public Child ActiveChild { get; set; }
+
+        public int? ActiveChildId { get; set; }
+
+        // all items mapped to this Parent
+        [Reference]
+        public List<Child> AllChildren { get; set; }
+    }
+
+    public class Child
+    {
+        [AutoIncrement]
+        public int Id { get; set; }
+
+        public int ParentId { get; set; }
+
+        public string Description { get; set; }
+    }
+
+    public class ParentChildCyclicalExample : OrmLiteTestBase
+    {
+        [Test]
+        public void Can_create_Parent_Child_Tables()
+        {
+            using (var db = OpenDbConnection())
+            {
+                db.DropAndCreateTable<Parent>();
+                db.DropAndCreateTable<Child>();
+
+                var parent = new Parent
+                {
+                    Name = "Parent",
+                    ActiveChild = new Child {  Description = "Active" },
+                    AllChildren = new List<Child>
+                    {
+                        new Child { Description = "Child 1" },
+                        new Child { Description = "Child 2" },
+                    }
+                };
+
+                db.Save(parent, references:true);
+
+                var dbParent = db.LoadSelect<Parent>()[0];
+                dbParent.PrintDump();
+
+                Assert.That(dbParent.ActiveChild, Is.Not.Null);
+                Assert.That(dbParent.AllChildren.Count, Is.EqualTo(3));
+            }
+        }
+    }
+}