dotnet run -- projections -r deleted streams and events

[kopfrechner]

Hi,

i just observed some unintended behaviour with the Marten.CommandLine Tool.

It was included as suggested:
https://martendb.io/configuration/cli.html#snippet-sample_using_WebApplication_1

Just short hint, since i think the Extension Methods got updated, they are called now:

...
// Add command line parsing for Marten
builder.Host.ApplyOaktonExtensions();
...
await app.RunOaktonCommands(args);

The observed behaviour is that when i run dotnet run -- projections -r, it deletes all data from the Database.
Not sure if i did something wrong in my setup. It already worked at some point for me.
I also want to mention, it is uncritical to me, since i'm working on a Hobby-Project, but maybe to others.

Here is the state before

Here is the state after running the command

It also occured, when i ran dotnet run -- projections -p <projection-name>.

Marten Setup is this:

Program.cs

var martenConfiguration = builder
    .Services.AddMarten(options => options.SetupStoreOptions(connectionString, isDevelopment))
    .AddSubscriptionWithServices<OnRideFinishedSendEmailNotificationHandler>(
        ServiceLifetime.Singleton,
        o => o.IncludeType<RideFinished>()
    )
    // Another performance optimization if you're starting from scratch
    .UseLightweightSessions()
    // Enable projection daemon
    .AddAsyncDaemon(DaemonMode.Solo);

StoreOptionsExtensions.cs

public static class StoreOptionsExtensions
{
    public static void SetupStoreOptions(
        this StoreOptions options,
        string connectionString,
        bool isDevelopment
    )
    {
        options.Connection(connectionString);

        options.UseSystemTextJsonForSerialization(
            EnumStorage.AsString,
            Casing.Default,
            jsonOptions => jsonOptions.Converters.Add(new JsonStringEnumConverter())
        );

        // If we're running in development mode, let Marten just take care
        // of all necessary schema building and patching behind the scenes
        if (isDevelopment)
        {
            options.AutoCreateSchemaObjects = AutoCreate.All;
        }

        // Ride
        options.Projections.Snapshot<Ride>(SnapshotLifecycle.Inline);
        options.Projections.Add<RideSummaryProjection>(ProjectionLifecycle.Async);

        // Rider
        options.Projections.Snapshot<Rider>(SnapshotLifecycle.Inline);
        options.Projections.Add<RiderHistoryProjection>(ProjectionLifecycle.Inline);
        options.Projections.Add<RiderTripProjection>(ProjectionLifecycle.Async);

        // Recent optimization you'd want with FetchForWriting up above
        options.Projections.UseIdentityMapForAggregates = true;

        // Turn on the PostgreSQL table partitioning for hot/cold storage on archived events
        options.Events.UseArchivedStreamPartitioning = true;
    }
}

Can you see something obvious? Would appreciate some hints.

Best Regards,
Christoph

[jeremydmiller]

dotnet run -- projections --rebuild would rewind all the projected data and rebuild from 0. It's possible they all failed to rebuild. Check your progression table to verify that. If they did fail, you should see oodles of logging if you're on at least Marten 7.

[kopfrechner]

Sorry, it's a bit hard to see in the Screenshots, but i meant the mt_streams and mt_events tables. The data of those tables was deleted too... So the CLI tool prints:
The event storage is empty, aborting.