Add SoftDeleteUseCase example

Author: mythz

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

@@ -313,6 +313,7 @@
     <Compile Include="UseCase\SimpleUseCase.cs" />
     <Compile Include="OrmLiteGetScalarTests.cs" />
     <Compile Include="OrmLiteCreateTableWithNamingStrategyTest.cs" />
+    <Compile Include="UseCase\SoftDeleteUseCase.cs" />
     <Compile Include="_TypeDescriptorMetadataTests.cs" />
   </ItemGroup>
   <ItemGroup>

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

@@ -0,0 +1,52 @@
+using NUnit.Framework;
+using ServiceStack.DataAnnotations;
+
+namespace ServiceStack.OrmLite.Tests.UseCase
+{
+    public interface ISoftDelete
+    {
+        bool IsDeleted { get; set; }
+    }
+
+    public class ModelWithSoftDelete : ISoftDelete
+    {
+        [AutoIncrement]
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public bool IsDeleted { get; set; }
+    }
+
+    public static class SqlExpressionExtensions
+    {
+        public static SqlExpression<T> OnlyActive<T>(this SqlExpression<T> q)
+            where T : ISoftDelete
+        {
+            return q.Where(x => x.IsDeleted != true);
+        }
+    }
+
+    public class SoftDeleteUseCase : OrmLiteTestBase
+    {
+        [Test]
+        public void Can_add_generic_soft_delete_filter_to_SqlExpression()
+        {
+            using (var db = OpenDbConnection())
+            {
+                db.DropAndCreateTable<ModelWithSoftDelete>();
+
+                db.Insert(new ModelWithSoftDelete { Name = "foo" });
+                db.Insert(new ModelWithSoftDelete { Name = "bar", IsDeleted = true });
+
+                var results = db.Select(db.From<ModelWithSoftDelete>().OnlyActive());
+
+                Assert.That(results.Count, Is.EqualTo(1));
+                Assert.That(results[0].Name, Is.EqualTo("foo"));
+
+                var result = db.Single(db.From<ModelWithSoftDelete>().Where(x => x.Name == "foo").OnlyActive());
+                Assert.That(result.Name, Is.EqualTo("foo"));
+                result = db.Single(db.From<ModelWithSoftDelete>().Where(x => x.Name == "bar").OnlyActive());
+                Assert.That(result, Is.Null);
+            }
+        }
+    }
+}