Some tests fixed.

src/Squidex.Domain.Apps.Core.Model/Apps/LanguagesConfig.cs

@@ -17,7 +17,6 @@ namespace Squidex.Domain.Apps.Core.Apps
 {
     public sealed class LanguagesConfig : IFieldPartitioning
     {
-        public static readonly LanguagesConfig Empty = new LanguagesConfig(ImmutableDictionary<Language, LanguageConfig>.Empty, null, false);
         public static readonly LanguagesConfig English = Build(Language.EN);
 
         private readonly ImmutableDictionary<Language, LanguageConfig> languages;

src/Squidex.Domain.Apps.Core.Model/Rules/Rule.cs

@@ -38,7 +38,10 @@ namespace Squidex.Domain.Apps.Core.Rules
             Guard.NotNull(action, nameof(action));
 
             this.trigger = trigger;
+            this.trigger.Freeze();
+
             this.action = action;
+            this.action.Freeze();
         }
 
         [Pure]
@@ -69,6 +72,8 @@ namespace Squidex.Domain.Apps.Core.Rules
                 throw new ArgumentException("New trigger has another type.", nameof(newTrigger));
             }
 
+            newTrigger.Freeze();
+
             return Clone(clone =>
             {
                 clone.trigger = newTrigger;
@@ -85,6 +90,8 @@ namespace Squidex.Domain.Apps.Core.Rules
                 throw new ArgumentException("New action has another type.", nameof(newAction));
             }
 
+            newAction.Freeze();
+
             return Clone(clone =>
             {
                 clone.action = newAction;

src/Squidex.Domain.Apps.Entities/Apps/State/AppState.cs

@@ -9,7 +9,6 @@ using Newtonsoft.Json;
 using Squidex.Domain.Apps.Core.Apps;
 using Squidex.Domain.Apps.Events;
 using Squidex.Domain.Apps.Events.Apps;
-using Squidex.Infrastructure;
 using Squidex.Infrastructure.Dispatching;
 using Squidex.Infrastructure.EventSourcing;
 using Squidex.Infrastructure.Reflection;
@@ -19,8 +18,6 @@ namespace Squidex.Domain.Apps.Entities.Apps.State
     public class AppState : DomainObjectState<AppState>,
         IAppEntity
     {
-        private static readonly LanguagesConfig English = LanguagesConfig.Build(Language.EN);
-
         [JsonProperty]
         public string Name { get; set; }
 
@@ -37,7 +34,7 @@ namespace Squidex.Domain.Apps.Entities.Apps.State
         public AppContributors Contributors { get; set; } = AppContributors.Empty;
 
         [JsonProperty]
-        public LanguagesConfig LanguagesConfig { get; set; } = English;
+        public LanguagesConfig LanguagesConfig { get; set; } = LanguagesConfig.English;
 
         [JsonProperty]
         public bool IsArchived { get; set; }

src/Squidex.Domain.Apps.Entities/Assets/AssetGrain.cs

@@ -21,7 +21,7 @@ using Squidex.Infrastructure.States;
 
 namespace Squidex.Domain.Apps.Entities.Assets
 {
-    public class AssetGrain : DomainObjectGrain<AssetState>, IAssetGrain
+    public class AssetGrain : SquidexDomainObjectGrain<AssetState>, IAssetGrain
     {
         public AssetGrain(IStore<Guid> store)
             : base(store)

src/Squidex.Domain.Apps.Entities/Backup/BackupGrain.cs

@@ -29,6 +29,7 @@ namespace Squidex.Domain.Apps.Entities.Backup
     public sealed class BackupGrain : Grain, IBackupGrain
     {
         private const int MaxBackups = 10;
+        private static readonly Duration UpdateDuration = Duration.FromSeconds(1);
         private readonly IClock clock;
         private readonly IAssetStore assetStore;
         private readonly IEventDataFormatter eventDataFormatter;
@@ -95,8 +96,6 @@ namespace Squidex.Domain.Apps.Entities.Backup
 
         private async Task CleanupAsync()
         {
-            var hasUpdated = false;
-
             foreach (var job in state.Jobs)
             {
                 if (!job.Stopped.HasValue)
@@ -104,21 +103,38 @@ namespace Squidex.Domain.Apps.Entities.Backup
                     await CleanupAsync(job);
 
                     job.Stopped = clock.GetCurrentInstant();
-                    job.Failed = true;
+                    job.IsFailed = true;
 
-                    hasUpdated = true;
+                    await WriteAsync();
                 }
             }
-
-            if (hasUpdated)
-            {
-                await WriteAsync();
-            }
         }
 
         private async Task CleanupAsync(BackupStateJob job)
         {
-            await backupArchiveLocation.DeleteArchiveAsync(job.Id);
+            try
+            {
+                await backupArchiveLocation.DeleteArchiveAsync(job.Id);
+            }
+            catch (Exception ex)
+            {
+                log.LogError(ex, w => w
+                    .WriteProperty("action", "deleteArchive")
+                    .WriteProperty("status", "failed")
+                    .WriteProperty("backupId", job.Id.ToString()));
+            }
+
+            try
+            {
+                await assetStore.DeleteAsync(job.Id.ToString(), 0, null);
+            }
+            catch (Exception ex)
+            {
+                log.LogError(ex, w => w
+                    .WriteProperty("action", "deleteBackup")
+                    .WriteProperty("status", "failed")
+                    .WriteProperty("backupId", job.Id.ToString()));
+            }
         }
 
         public async Task RunAsync()
@@ -138,7 +154,9 @@ namespace Squidex.Domain.Apps.Entities.Backup
             currentTask = new CancellationTokenSource();
             currentJob = job;
 
-            state.Jobs.Add(job);
+            var lastTimestamp = job.Started;
+
+            state.Jobs.Insert(0, job);
 
             await WriteAsync();
 
@@ -152,8 +170,8 @@ namespace Squidex.Domain.Apps.Entities.Backup
                         {
                             var eventData = @event.Data;
 
-                            if (eventData.Type == nameof(AssetCreated) ||
+                            if (eventData.Type == "AssetCreatedEvent" ||
-                                eventData.Type == nameof(AssetUpdated))
+                                eventData.Type == "AssetUpdatedEvent")
                             {
                                 var parsedEvent = eventDataFormatter.Parse(eventData);
 
@@ -176,11 +194,24 @@ namespace Squidex.Domain.Apps.Entities.Backup
                                 {
                                     await assetStore.DownloadAsync(assetId.ToString(), assetVersion, null, attachmentStream);
                                 });
+
+                                job.HandledAssets++;
                             }
                             else
                             {
                                 await writer.WriteEventAsync(eventData);
                             }
+
+                            job.HandledEvents++;
+
+                            var now = clock.GetCurrentInstant();
+
+                            if ((now - lastTimestamp) >= UpdateDuration)
+                            {
+                                lastTimestamp = now;
+
+                                await WriteAsync();
+                            }
                         }, SquidexHeaders.AppId, appId.ToString(), null, currentTask.Token);
                     }
 
@@ -189,16 +220,21 @@ namespace Squidex.Domain.Apps.Entities.Backup
                     currentTask.Token.ThrowIfCancellationRequested();
 
                     await assetStore.UploadAsync(job.Id.ToString(), 0, null, stream, currentTask.Token);
-
-                    currentTask.Token.ThrowIfCancellationRequested();
                 }
             }
-            catch
+            catch (Exception ex)
             {
-                job.Failed = true;
+                log.LogError(ex, w => w
+                    .WriteProperty("action", "makeBackup")
+                    .WriteProperty("status", "failed")
+                    .WriteProperty("backupId", job.Id.ToString()));
+
+                job.IsFailed = true;
             }
             finally
             {
+                await CleanupAsync(job);
+
                 job.Stopped = clock.GetCurrentInstant();
 
                 await WriteAsync();

src/Squidex.Domain.Apps.Entities/Backup/IBackupJob.cs

@@ -18,6 +18,10 @@ namespace Squidex.Domain.Apps.Entities.Backup
 
         Instant? Stopped { get; }
 
-        bool Failed { get; }
+        int HandledEvents { get; }
+
+        int HandledAssets { get; }
+
+        bool IsFailed { get; }
     }
 }

src/Squidex.Domain.Apps.Entities/Backup/State/BackupStateJob.cs

@@ -23,6 +23,12 @@ namespace Squidex.Domain.Apps.Entities.Backup.State
         public Instant? Stopped { get; set; }
 
         [JsonProperty]
-        public bool Failed { get; set; }
+        public int HandledEvents { get; set; }
+
+        [JsonProperty]
+        public int HandledAssets { get; set; }
+
+        [JsonProperty]
+        public bool IsFailed { get; set; }
     }
 }

src/Squidex.Infrastructure.Azure/Assets/AzureBlobAssetStore.cs

@@ -114,18 +114,25 @@ namespace Squidex.Infrastructure.Assets
             await blobRef.SetMetadataAsync();
         }
 
-        public async Task UploadAsync(string name, Stream stream, CancellationToken ct = default(CancellationToken))
+        public Task UploadAsync(string name, Stream stream, CancellationToken ct = default(CancellationToken))
         {
             var tempBlob = blobContainer.GetBlockBlobReference(name);
 
-            await tempBlob.UploadFromStreamAsync(stream, null, null, null, ct);
+            return tempBlob.UploadFromStreamAsync(stream, null, null, null, ct);
         }
 
-        public async Task DeleteAsync(string name)
+        public Task DeleteAsync(string name)
         {
             var tempBlob = blobContainer.GetBlockBlobReference(name);
 
-            await tempBlob.DeleteIfExistsAsync();
+            return tempBlob.DeleteIfExistsAsync();
+        }
+
+        public Task DeleteAsync(string id, long version, string suffix)
+        {
+            var tempBlob = blobContainer.GetBlockBlobReference(GetObjectName(id, version, suffix));
+
+            return tempBlob.DeleteIfExistsAsync();
         }
 
         private string GetObjectName(string id, long version, string suffix)

src/Squidex.Infrastructure.GoogleCloud/Assets/GoogleCloudAssetStore.cs

@@ -104,6 +104,21 @@ namespace Squidex.Infrastructure.Assets
             }
         }
 
+        public async Task DeleteAsync(string id, long version, string suffix)
+        {
+            try
+            {
+                await storageClient.DeleteObjectAsync(bucketName, GetObjectName(id, version, suffix));
+            }
+            catch (GoogleApiException ex)
+            {
+                if (ex.HttpStatusCode != HttpStatusCode.NotFound)
+                {
+                    throw;
+                }
+            }
+        }
+
         private string GetObjectName(string id, long version, string suffix)
         {
             Guard.NotNullOrEmpty(id, nameof(id));

src/Squidex.Infrastructure/Assets/FolderAssetStore.cs

@@ -112,20 +112,22 @@ namespace Squidex.Infrastructure.Assets
             }
         }
 
+        public Task DeleteAsync(string id, long version, string suffix)
+        {
+            var file = GetFile(id, version, suffix);
+
+            file.Delete();
+
+            return TaskHelper.Done;
+        }
+
         public Task DeleteAsync(string name)
         {
-            try
+            var file = GetFile(name);
-            {
-                var file = GetFile(name);
 
-                file.Delete();
+            file.Delete();
 
-                return TaskHelper.Done;
+            return TaskHelper.Done;
-            }
-            catch (FileNotFoundException ex)
-            {
-                throw new AssetNotFoundException($"Asset {name} not found.", ex);
-            }
         }
 
         private FileInfo GetFile(string id, long version, string suffix)

src/Squidex.Infrastructure/Assets/IAssetStore.cs

@@ -24,5 +24,7 @@ namespace Squidex.Infrastructure.Assets
         Task UploadAsync(string id, long version, string suffix, Stream stream, CancellationToken ct = default(CancellationToken));
 
         Task DeleteAsync(string name);
+
+        Task DeleteAsync(string id, long version, string suffix);
     }
 }

src/Squidex/Areas/Api/Controllers/Backups/BackupsContentController.cs → src/Squidex/Areas/Api/Controllers/Backups/BackupContentController.cs

@@ -17,15 +17,14 @@ namespace Squidex.Areas.Api.Controllers.Backups
     /// <summary>
     /// Manages backups for app.
     /// </summary>
-    [ApiAuthorize]
     [ApiExceptionFilter]
     [AppApi]
     [SwaggerTag(nameof(Backups))]
-    public class BackupsContentController : ApiController
+    public class BackupContentController : ApiController
     {
         private readonly IAssetStore assetStore;
 
-        public BackupsContentController(ICommandBus commandBus, IAssetStore assetStore)
+        public BackupContentController(ICommandBus commandBus, IAssetStore assetStore)
             : base(commandBus)
         {
             this.assetStore = assetStore;

src/Squidex/Config/Domain/EntitiesServices.cs

@@ -161,6 +161,9 @@ namespace Squidex.Config.Domain
             services.AddTransientAs<ConvertEventStore>()
                 .As<IMigration>();
 
+            services.AddTransientAs<ConvertEventStoreAppId>()
+                .As<IMigration>();
+
             services.AddTransientAs<AddPatterns>()
                 .As<IMigration>();
 

src/Squidex/app/features/settings/pages/backups/backups-page.component.html

@@ -1,10 +1,10 @@
 <sqx-title message="{app} | Backups | Settings" parameter1="app" [value1]="ctx.appName"></sqx-title>
 
-<sqx-panel desiredWidth="60rem">
+<sqx-panel desiredWidth="50rem">
     <div class="panel-header">
         <div class="panel-title-row">
             <div class="float-right">
-                <button class="btn btn-success" [disabled]="backups.length === 0" (click)="startBackup()">
+                <button class="btn btn-success" [disabled]="backups.length === 10" (click)="startBackup()">
                     Start Backup
                 </button>
             </div>
@@ -23,10 +23,10 @@
                 Your have reached the maximum number of backups: 10.
             </div>
             
-            <div class="table-items-row" *ngFor="let backup of backups">
+            <div class="table-items-row" *ngFor="let backup of backups; trackBy: trackBy">
-                <div class="row">
+                <div class="row no-gutter">
                     <div class="col col-auto">
-                        <div *ngIf="!backup.stopped" class="backup-status backup-status-pending icon-spin">
+                        <div *ngIf="!backup.stopped" class="backup-status backup-status-pending spin">
                             <i class="icon-hour-glass"></i>
                         </div>
                         <div *ngIf="backup.stopped && backup.isFailed" class="backup-status backup-status-failed">
@@ -37,32 +37,34 @@
                         </div>
                     </div>
                     <div class="col col-auto">
-                        <div>Started:</div>
+                        <div>
-                        <div>Stopped:</div>
+                            Started:
+                        </div>
+                        <div>
+                            Duration:
+                        </div>
                     </div>
-                    <div class="col">
+                    <div class="col col-auto">
                         <div>
                             {{backup.started.toISOString()}}
                         </div>
                         <div *ngIf="backup.stopped">
-                            {{backup.stopped.toISOString()}}
+                            {{getDuration(backup) | sqxDuration}}
                         </div>
                     </div>
-                    <div class="col col-auto">
-                        <div>Progress:</div>
-                        <div>Download:</div>
-                    </div>
                     <div class="col">
                         <div>
                             <span title="Archived events">
-                                <strong>{{backup.handledEvents}}</strong> <i class="icon-time"></i>
+                                Events: <strong class="backup-progress">{{backup.handledEvents | sqxKNumber}}</strong>
                             </span>, 
                             <span title="Archived assets">
-                                <strong>{{backup.handledAssets}}</strong> <i class="icon-media"></i>
+                                Assets: <strong class="backup-progress">{{backup.handledAssets | sqxKNumber}}</strong> 
                             </span>
                         </div>
-                        <div>
+                        <div *ngIf="backup.stopped && !backup.isFailed">
-                            <a *ngIf="backup.stopped && !backup.isFailed" href="{{getDownloadUrl(backup)}}" target="_blank">
+                            Download:
+
+                            <a href="{{getDownloadUrl(backup)}}" target="_blank">
                                 Ready
                             </a>
                         </div>

src/Squidex/app/features/settings/pages/backups/backups-page.component.scss

@@ -6,12 +6,13 @@ $cicle-size: 2.8rem;
 .backup-status {
     & {
         @include circle($cicle-size);
-        line-height: $cicle-size;
+        line-height: $cicle-size + .1rem;
         text-align: center;
         font-size: .4 * $cicle-size;
         font-weight: normal;
         background: $color-border;
         color: $color-dark-foreground;
+        vertical-align: middle;
     }
 
     &-pending {

src/Squidex/app/features/settings/pages/backups/backups-page.component.ts

@@ -14,6 +14,7 @@ import {
     BackupDto,
     BackupsService,
     DateTime,
+    Duration,
     ImmutableArray
 } from 'shared';
 
@@ -77,5 +78,13 @@ export class BackupsPageComponent implements OnInit, OnDestroy {
     public getDownloadUrl(backup: BackupDto) {
         return this.apiUrl.buildUrl(`api/apps/${this.ctx.appName}/backups/${backup.id}`);
     }
+
+    public getDuration(backup: BackupDto) {
+        return Duration.create(backup.started, backup.stopped!);
+    }
+
+    public trackBy(index: number, item: BackupDto) {
+        return item.id;
+    }
 }
 

src/Squidex/app/framework/angular/date-time.pipes.spec.ts

@@ -23,12 +23,12 @@ const dateTime = DateTime.parse('2013-10-03T12:13:14.125', DateTime.iso8601());
 
 describe('DurationPipe', () => {
     it('should format to standard duration string', () => {
-        const duration = Duration.create(dateTime, dateTime.addMinutes(10).addDays(13));
+        const duration = Duration.create(dateTime, dateTime.addMinutes(10).addDays(13).addSeconds(10));
 
         const pipe = new DurationPipe();
 
         const actual = pipe.transform(duration);
-        const expected = '312:10h';
+        const expected = '312:10:10';
 
         expect(actual).toBe(expected);
     });

src/Squidex/app/framework/utils/duration.spec.ts

@@ -28,24 +28,24 @@ describe('Duration', () => {
 
     it('should print to string correctly', () => {
         const s = DateTime.today();
-        const d = s.addHours(1).addMinutes(30).addSeconds(60);
+        const d = s.addHours(12).addMinutes(30).addSeconds(60);
 
         const duration = Duration.create(s, d);
 
         const actual = duration.toString();
-        const expected = '1:31h';
+        const expected = '12:31:00';
 
         expect(actual).toBe(expected);
     });
 
     it('should print to string correctly for one digit minutes', () => {
         const s = DateTime.today();
-        const d = s.addHours(1).addMinutes(1).addSeconds(60);
+        const d = s.addHours(1).addMinutes(2).addSeconds(5);
 
         const duration = Duration.create(s, d);
 
         const actual = duration.toString();
-        const expected = '1:02h';
+        const expected = '01:02:05';
 
         expect(actual).toBe(expected);
     });

src/Squidex/app/framework/utils/duration.ts

@@ -25,12 +25,24 @@ export class Duration {
     public toString(): string {
         const duration = moment.duration(this.value);
 
+        let hoursString = Math.floor(duration.asHours()).toString();
+
+        if (hoursString.length === 1) {
+            hoursString = `0${hoursString}`;
+        }
+
         let minutesString = duration.minutes().toString();
 
         if (minutesString.length === 1) {
             minutesString = `0${minutesString}`;
         }
 
-        return Math.floor(duration.asHours()) + ':' + minutesString + 'h';
+        let secondsString = duration.seconds().toString();
+
+        if (secondsString.length === 1) {
+            secondsString = `0${secondsString}`;
+        }
+
+        return `${hoursString}:${minutesString}:${secondsString}`;
     }
 }

tests/RunCoverage.ps1

@@ -47,7 +47,7 @@ if ($all -Or $appsEntities) {
 	-register:user `
 	-target:"C:\Program Files\dotnet\dotnet.exe" `
 	-targetargs:"test $folderWorking\Squidex.Domain.Apps.Entities.Tests\Squidex.Domain.Apps.Entities.Tests.csproj" `
-	-filter:"+[Squidex.Domain.Apps.Entities*]*" `
+	-filter:"+[Squidex.Domain.Apps.Entities*]* -[Squidex.Domain.Apps.Entities*]*CodeGen*" `
 	-skipautoprops `
 	-output:"$folderWorking\$folderReports\Entities.xml" `
 	-oldStyle

tests/Squidex.Domain.Apps.Core.Tests/Operations/HandleRules/RuleEventFormatterTests.cs

@@ -37,6 +37,36 @@ namespace Squidex.Domain.Apps.Core.Operations.HandleRules
             Assert.True(result is JObject);
         }
 
+        [Fact]
+        public void Should_create_route_data()
+        {
+            var appId = Guid.NewGuid();
+
+            var @event = new ContentCreated
+            {
+                AppId = new NamedId<Guid>(appId, "my-app")
+            };
+
+            var result = sut.ToRouteData(AsEnvelope(@event));
+
+            Assert.True(result is JObject);
+        }
+
+        [Fact]
+        public void Should_create_route_data_from_event()
+        {
+            var appId = Guid.NewGuid();
+
+            var @event = new ContentCreated
+            {
+                AppId = new NamedId<Guid>(appId, "my-app")
+            };
+
+            var result = sut.ToRouteData(AsEnvelope(@event), "MyEventName");
+
+            Assert.Equal("MyEventName", result["type"]);
+        }
+
         [Fact]
         public void Should_replace_app_information_from_event()
         {
@@ -165,6 +195,23 @@ namespace Squidex.Domain.Apps.Core.Operations.HandleRules
             Assert.Equal("Berlin", result);
         }
 
+        [Fact]
+        public void Should_return_plain_value_when_found_from_update_event()
+        {
+            var @event = new ContentUpdated
+            {
+                Data =
+                    new NamedContentData()
+                        .AddField("city",
+                            new ContentFieldData()
+                                .AddValue("iv", "Berlin"))
+            };
+
+            var result = sut.FormatString("$CONTENT_DATA.city.iv", AsEnvelope(@event));
+
+            Assert.Equal("Berlin", result);
+        }
+
         [Fact]
         public void Should_return_undefined_when_null()
         {

tests/Squidex.Domain.Apps.Core.Tests/Operations/HandleRules/RuleServiceTests.cs

@@ -77,7 +77,7 @@ namespace Squidex.Domain.Apps.Core.Operations.HandleRules
         }
 
         [Fact]
-        public void Should_not_create_trigger_if_no_trigger_handler_registered()
+        public void Should_not_create_job_if_no_trigger_handler_registered()
         {
             var ruleConfig = new Rule(new InvalidTrigger(), new WebhookAction());
             var ruleEnvelope = Envelope.Create(new ContentCreated());
@@ -88,7 +88,7 @@ namespace Squidex.Domain.Apps.Core.Operations.HandleRules
         }
 
         [Fact]
-        public void Should_not_create_trigger_if_no_action_handler_registered()
+        public void Should_not_create_job_if_no_action_handler_registered()
         {
             var ruleConfig = new Rule(new ContentChangedTrigger(), new InvalidAction());
             var ruleEnvelope = Envelope.Create(new ContentCreated());
@@ -101,7 +101,7 @@ namespace Squidex.Domain.Apps.Core.Operations.HandleRules
         [Fact]
         public void Should_not_create_if_not_triggered()
         {
-            var ruleConfig = new Rule(new ContentChangedTrigger(), new InvalidAction());
+            var ruleConfig = new Rule(new ContentChangedTrigger(), new WebhookAction());
             var ruleEnvelope = Envelope.Create(new ContentCreated());
 
             A.CallTo(() => ruleTriggerHandler.Triggers(A<Envelope<AppEvent>>.Ignored, ruleConfig.Trigger))

tests/Squidex.Infrastructure.Tests/Assets/AssetStoreTests.cs

@@ -84,7 +84,7 @@ namespace Squidex.Infrastructure.Assets
         }
 
         [Fact]
-        public async Task Should_ignore_when_deleting_twice()
+        public async Task Should_ignore_when_deleting_twice_by_name()
         {
             ((IInitializable)Sut).Initialize();
 
@@ -97,6 +97,20 @@ namespace Squidex.Infrastructure.Assets
             await Sut.DeleteAsync(tempId);
         }
 
+        [Fact]
+        public async Task Should_ignore_when_deleting_twice_by_id()
+        {
+            ((IInitializable)Sut).Initialize();
+
+            var tempId = Id();
+
+            var assetData = new MemoryStream(new byte[] { 0x1, 0x2, 0x3, 0x4 });
+
+            await Sut.UploadAsync(tempId, 0, null, assetData);
+            await Sut.DeleteAsync(tempId, 0, null);
+            await Sut.DeleteAsync(tempId, 0, null);
+        }
+
         private static string Id()
         {
             return Guid.NewGuid().ToString();

tools/Migrate_01/MigrationPath.cs

@@ -15,7 +15,7 @@ namespace Migrate_01
 {
     public sealed class MigrationPath : IMigrationPath
     {
-        private const int CurrentVersion = 6;
+        private const int CurrentVersion = 7;
         private readonly IServiceProvider serviceProvider;
 
         public MigrationPath(IServiceProvider serviceProvider)
@@ -38,6 +38,12 @@ namespace Migrate_01
                 migrations.Add(serviceProvider.GetRequiredService<ConvertEventStore>());
             }
 
+            // Version 7: Introduces AppId for backups.
+            else if (version < 7)
+            {
+                migrations.Add(serviceProvider.GetRequiredService<ConvertEventStoreAppId>());
+            }
+
             // Version 5: Fixes the broken command architecture and requires a rebuild of all snapshots.
             if (version < 5)
             {

tools/Migrate_01/Migrations/ConvertEventStoreAppId.cs

@@ -0,0 +1,54 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+using System;
+using System.Threading.Tasks;
+using MongoDB.Bson;
+using MongoDB.Driver;
+using Newtonsoft.Json.Linq;
+using Squidex.Domain.Apps.Events;
+using Squidex.Infrastructure;
+using Squidex.Infrastructure.EventSourcing;
+using Squidex.Infrastructure.Migrations;
+
+namespace Migrate_01.Migrations
+{
+    public sealed class ConvertEventStoreAppId : IMigration
+    {
+        private readonly IEventStore eventStore;
+
+        public ConvertEventStoreAppId(IEventStore eventStore)
+        {
+            this.eventStore = eventStore;
+        }
+
+        public async Task UpdateAsync()
+        {
+            if (eventStore is MongoEventStore mongoEventStore)
+            {
+                var collection = mongoEventStore.RawCollection;
+
+                var filter = Builders<BsonDocument>.Filter;
+
+                await collection.Find(new BsonDocument()).ForEachAsync(async commit =>
+                {
+                    foreach (BsonDocument @event in commit["Events"].AsBsonArray)
+                    {
+                        var data = JObject.Parse(@event["Payload"].AsString);
+
+                        if (data.TryGetValue("appId", out var appId))
+                        {
+                            @event["Metadata"][SquidexHeaders.AppId] = NamedId<Guid>.Parse(appId.ToString(), Guid.TryParse).Id.ToString();
+                        }
+                    }
+
+                    await collection.ReplaceOneAsync(filter.Eq("_id", commit["_id"].AsString), commit);
+                });
+            }
+        }
+    }
+}