Skip to main content

Marten–Soft Deletes

On one of my projects we are using Marten, which provides a Document Store and Event Store api on top of PostgreSQL.  Behind the scenes it uses the powerfull JSON functionality that is built into the PostgreSQL database engine. The fact that we are still using an ACID compliant database makes it all a lot easier.

image

One of the features that Marten supports are ‘soft-deletes’. This means that documents are never actually deleted from the database. Marten will automatically filter out documents marked as deleted unless you explicitly state otherwise in the Linq Where clause.

However when requesting a specific document I noticed that I still got my deleted document back;

var document=await session.LoadAsync(id);

If I used the query syntax instead the specific document was filtered out as expected:

var documents=await session.Query().Where(s => ..);

The following GitHub issue brought some insights: https://github.com/JasperFx/marten/issues/808 . This functionality is by design, if you know the id of the document you’ll get it back. Load will not respect the deleted flag.

Good to know!

Labels:

Popular posts from this blog

.NET 8–Keyed/Named Services

A feature that a lot of IoC container libraries support but that was missing in the default DI container provided by Microsoft is the support for Keyed or Named Services. This feature allows you to register the same type multiple times using different names, allowing you to resolve a specific instance based on the circumstances. Although there is some controversy if supporting this feature is a good idea or not, it certainly can be handy. To support this feature a new interface IKeyedServiceProvider got introduced in .NET 8 providing 2 new methods on our ServiceProvider instance: object? GetKeyedService(Type serviceType, object? serviceKey); object GetRequiredKeyedService(Type serviceType, object? serviceKey); To use it, we need to register our service using one of the new extension methods: Resolving the service can be done either through the FromKeyedServices attribute: or by injecting the IKeyedServiceProvider interface and calling the GetRequiredKeyedServic...
Read more

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.
Read more

Kubernetes–Limit your environmental impact

Reducing the carbon footprint and CO2 emission of our (cloud) workloads, is a responsibility of all of us. If you are running a Kubernetes cluster, have a look at Kube-Green . kube-green is a simple Kubernetes operator that automatically shuts down (some of) your pods when you don't need them. A single pod produces about 11 Kg CO2eq per year( here the calculation). Reason enough to give it a try! Installing kube-green in your cluster The easiest way to install the operator in your cluster is through kubectl. We first need to install a cert-manager: kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.14.5/cert-manager.yaml Remark: Wait a minute before you continue as it can take some time before the cert-manager is up & running inside your cluster. Now we can install the kube-green operator: kubectl apply -f https://github.com/kube-green/kube-green/releases/latest/download/kube-green.yaml Now in the namespace where we want t...
Read more