Fixed: Alternative Titles appearing multiple times. Duplicate alt titles will be deleted. Fixes #2040

src/NzbDrone.Core/Datastore/BasicRepository.cs

@@ -59,7 +59,7 @@ namespace NzbDrone.Core.Datastore
 
         public IEnumerable<TModel> All()
         {
-            return DataMapper.Query<TModel>().ToList();
+            return Query.ToList();
         }
 
         public int Count()

src/NzbDrone.Core/Datastore/Migration/141_fix_duplicate_alt_titles.cs

@@ -0,0 +1,32 @@
+using System.Collections.Generic;
+using System.Data;
+using FluentMigrator;
+using Newtonsoft.Json.Linq;
+using NzbDrone.Common.Extensions;
+using NzbDrone.Common.Serializer;
+using NzbDrone.Core.Datastore.Migration.Framework;
+
+namespace NzbDrone.Core.Datastore.Migration
+{
+    [Migration(141)]
+    public class fix_duplicate_alt_titles : NzbDroneMigrationBase
+    {
+        protected override void MainDbUpgrade()
+        {
+            Execute.WithConnection(RenameUrlToBaseUrl);
+            Alter.Table("AlternativeTitles").AlterColumn("CleanTitle").AsString().Unique();
+        }
+
+        private void RenameUrlToBaseUrl(IDbConnection conn, IDbTransaction tran)
+        {
+            using (var cmd = conn.CreateCommand())
+            {
+                cmd.Transaction = tran;
+                cmd.CommandText = "DELETE FROM AlternativeTitles WHERE rowid NOT IN ( SELECT MIN(rowid) FROM AlternativeTitles GROUP BY CleanTitle )";
+
+                cmd.ExecuteNonQuery();
+                
+            }
+        }
+    }
+}

src/NzbDrone.Core/NzbDrone.Core.csproj

@@ -126,6 +126,7 @@
     <Compile Include="Authentication\UserService.cs" />
     <Compile Include="Datastore\Migration\123_create_netimport_table.cs" />
     <Compile Include="Datastore\Migration\140_add_alternative_titles_table.cs" />
+    <Compile Include="Datastore\Migration\141_fix_duplicate_alt_titles.cs" />
     <Compile Include="Housekeeping\Housekeepers\CleanupOrphanedAlternativeTitles.cs" />
     <Compile Include="MediaFiles\Events\MovieFileUpdatedEvent.cs" />
     <Compile Include="Datastore\Migration\134_add_remux_qualities_for_the_wankers.cs" />