* Proper exception for migration problem.

src/Squidex.Infrastructure/Migrations/MigrationFailedException.cs

@@ -0,0 +1,46 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+using System;
+using System.Runtime.Serialization;
+
+namespace Squidex.Infrastructure.Migrations
+{
+    [Serializable]
+    public class MigrationFailedException : Exception
+    {
+        public string Name { get; }
+
+        public MigrationFailedException(string name)
+            : base(FormatException(name))
+        {
+            Name = name;
+        }
+
+        public MigrationFailedException(string name, Exception inner)
+            : base(FormatException(name), inner)
+        {
+            Name = name;
+        }
+
+        protected MigrationFailedException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+            Name = info.GetString(nameof(Name));
+        }
+
+        public override void GetObjectData(SerializationInfo info, StreamingContext context)
+        {
+            info.AddValue(nameof(Name), Name);
+        }
+
+        private static string FormatException(string name)
+        {
+            return $"Failed to run migration '{name}'";
+        }
+    }
+}

src/Squidex.Infrastructure/Migrations/Migrator.cs

@@ -84,7 +84,7 @@ namespace Squidex.Infrastructure.Migrations
                                 .WriteProperty("status", "Failed")
                                 .WriteProperty("migrator", name));
 
-                            throw;
+                            throw new MigrationFailedException(name, ex);
                         }
                     }
 

tests/Squidex.Infrastructure.Tests/Migrations/MigratorTests.cs

@@ -152,9 +152,9 @@ namespace Squidex.Infrastructure.Migrations
 
             var sut = new Migrator(status, path, log);
 
-            await Assert.ThrowsAsync<InvalidOperationException>(() => sut.MigrateAsync());
+            await Assert.ThrowsAsync<MigrationFailedException>(() => sut.MigrateAsync());
 
-            A.CallTo(() => log.Log<None>(SemanticLogLevel.Fatal, default, A<Action<None, IObjectWriter>>.Ignored))
+            A.CallTo(() => log.Log(SemanticLogLevel.Fatal, default, A<Action<None, IObjectWriter>>.Ignored))
                 .MustHaveHappened();
 
             A.CallTo(() => migrator_1_2.UpdateAsync())