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iappwebdev avatar iappwebdev commented on September 25, 2024

I found another way doing this. In fact I have all necessary informations in the .UpdateFromContext()-Method. So in there I can perform a standard MongoDb-Update.

The only thing I could not figure out, how to return an "empty" Update operation, so I do an additional call to update.Set(). Maybe someone has a hint how to solve this better?

On<ItemQuantityChanged>(
    builder =>
    {
        return builder
            .UpdateOne
            .Filter(
                (ctx, filter) => filter.ElemMatch(
                    pickupstation => pickupstation.Shelves,
                    Builders<Shelve>.Filter.Eq(a => a.Reservation!.Id, ctx.Stream.GetId())
                )
            )
            .UpdateFromContext(
                async (ctx, update) =>
                {
                    var updateDefinition = Builders<PickupstationDocument>
                        .Update
                        .Set("Shelves.$[shelve].Reservation.Articles.$[article].Quantity", ctx.Message.NewQuantity);

                    var arrayFilterDefinitions = new List<ArrayFilterDefinition>
                    {
                        new BsonDocumentArrayFilterDefinition<BsonDocument>(
                            new BsonDocument("shelve.Reservation.Id", ctx.Stream.GetId())
                        ),
                        new BsonDocumentArrayFilterDefinition<BsonDocument>(
                            new BsonDocument("article.Name", ctx.Message.ArticleName)
                        )
                    };

                    MongoDB.Driver.UpdateResult updateResult = await Collection
                        .UpdateOneAsync(
                            x => x.Shelves.Any(shelve => shelve.Reservation != null && shelve.Reservation!.Id == ctx.Stream.GetId()),
                            updateDefinition,
                            new UpdateOptions
                            {
                                ArrayFilters = arrayFilterDefinitions
                            }
                        )
                        .ConfigureAwait(true);

                    return update.Set(x => x.LastChanged, ctx.Created);
                }
            );
    }
);

Nevertheless the original problem is fixed.

from eventuous.

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