From aae53c390942d63ba614dc5d4203cdb2421f4c2b Mon Sep 17 00:00:00 2001
From: Daniel Stolt <daniel@ideliverable.com>
Date: Wed, 19 Aug 2015 12:21:24 +0100
Subject: [PATCH] Added unique constraints to data migration records.

---
 .../Orchard.ImportExport/Services/SetupService.cs    |  4 ++++
 .../Modules/Orchard.Setup/Services/SetupService.cs   | 12 +++++++-----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/Orchard.Web/Modules/Orchard.ImportExport/Services/SetupService.cs b/src/Orchard.Web/Modules/Orchard.ImportExport/Services/SetupService.cs
index 66352f7a8..698e67947 100644
--- a/src/Orchard.Web/Modules/Orchard.ImportExport/Services/SetupService.cs
+++ b/src/Orchard.Web/Modules/Orchard.ImportExport/Services/SetupService.cs
@@ -92,11 +92,15 @@ namespace Orchard.ImportExport.Services
                     environment.Resolve<ITransactionManager>().RequireNew();
 
                     var schemaBuilder = new SchemaBuilder(environment.Resolve<IDataMigrationInterpreter>());
+
                     schemaBuilder.CreateTable("Orchard_Framework_DataMigrationRecord", table => table
                         .Column<int>("Id", column => column.PrimaryKey().Identity())
                         .Column<string>("DataMigrationClass")
                         .Column<int>("Version"));
 
+                    schemaBuilder.AlterTable("Orchard_Framework_DataMigrationRecord",
+                        table => table.CreateUniqueConstraint("UC_DataMigrationRecord_DataMigrationClass_Version", "DataMigrationClass", "Version"));
+
                     var dataMigrationManager = environment.Resolve<IDataMigrationManager>();
                     dataMigrationManager.Update("Settings");
 
diff --git a/src/Orchard.Web/Modules/Orchard.Setup/Services/SetupService.cs b/src/Orchard.Web/Modules/Orchard.Setup/Services/SetupService.cs
index 694348273..fa8b2c0fb 100644
--- a/src/Orchard.Web/Modules/Orchard.Setup/Services/SetupService.cs
+++ b/src/Orchard.Web/Modules/Orchard.Setup/Services/SetupService.cs
@@ -146,11 +146,13 @@ namespace Orchard.Setup.Services {
                     // Make a workaround to avoid the Transaction issue for PostgreSQL
                     environment.Resolve<ITransactionManager>().RequireNew();
 
-                    schemaBuilder.CreateTable("Orchard_Framework_DataMigrationRecord",
-                                              table => table
-                                                           .Column<int>("Id", column => column.PrimaryKey().Identity())
-                                                           .Column<string>("DataMigrationClass")
-                                                           .Column<int>("Version"));
+                    schemaBuilder.CreateTable("Orchard_Framework_DataMigrationRecord", table => table
+                        .Column<int>("Id", column => column.PrimaryKey().Identity())
+                        .Column<string>("DataMigrationClass")
+                        .Column<int>("Version"));
+
+                    schemaBuilder.AlterTable("Orchard_Framework_DataMigrationRecord",
+                        table => table.CreateUniqueConstraint("UC_DataMigrationRecord_DataMigrationClass_Version", "DataMigrationClass", "Version"));
 
                     var dataMigrationManager = environment.Resolve<IDataMigrationManager>();
                     dataMigrationManager.Update("Settings");