F# WebApiTest

Web API written in F# that showcases the language's strengths via a functional style.

Background

As a .NET developer with experience in C# and OOP I wanted to take a plunge in the functional world. After learning Haskell and F# I wanted to see how an enterprise level API solution would be structured in a functional setting.

I've read multiple posts from both Mark Seemann's blog and Scott Wlaschin's blog to further this goal and pick up best practices and principles.

Goal

The focus is creating a sustainable software solution using .NET and F#.

Technologies and Tools

The solution is built on .NET 5 in VS2019.

For DB access I chose FSharp.Data.SqlClient as it's a type provider and showcases the language's strengths.

Giraffe is used on top of ASP.NET for it's funtional first features.

For package management I selected Paket.

Concepts

• Railway Oriented Programming (see this)
• Dependency Rejection (see this and this)
• Parse don't validate (see this)
• Async