CommunityNews

CommunityNews

IHP – A Haskell web framework

IHP is a modern batteries-included haskell web framework, built on top of Haskell and Nix.

We believe that functional programing is the future of software development and want to make functional programing with haskell and nix available to anyone. We try to offer a solution which can be used by developers who have not worked with haskell yet. IHP comes with everything you need to build great web applications with haskell and nix. We have made a lot of pragmatic decision to get you started faster. This way you can just pick up haskell along the way :slight_smile:

IHP stands for Integrated Haskell Platform.

This thread was posted by one of our members via one of our automated news source trackers.

Most Liked

SmithyTT

SmithyTT

Example controller

module Web.Controller.Posts where

import Web.Controller.Prelude
import Web.View.Posts.Index
import Web.View.Posts.New
import Web.View.Posts.Edit
import Web.View.Posts.Show
import qualified Text.MMark as MMark

instance Controller PostsController where
    action PostsAction = do
        posts <- query @Post
            |> orderByDesc #createdAt
            |> fetch
        render IndexView { .. }

    action NewPostAction = do
        let post = newRecord
        render NewView { .. }

    action ShowPostAction { postId } = do
        post <- fetch postId
            >>= pure . modify #comments (orderByDesc #createdAt)
            >>= fetchRelated #comments
        render ShowView { .. }

    action EditPostAction { postId } = do
        post <- fetch postId
        render EditView { .. }

    action UpdatePostAction { postId } = do
        post <- fetch postId
        post
            |> buildPost
            |> ifValid \case
                Left post -> render EditView { .. }
                Right post -> do
                    post <- post |> updateRecord
                    setSuccessMessage "Post updated"
                    redirectTo EditPostAction { .. }

    action CreatePostAction = do
        let post = newRecord @Post
        post
            |> buildPost
            |> ifValid \case
                Left post -> render NewView { .. } 
                Right post -> do
                    post <- post |> createRecord
                    setSuccessMessage "Post created"
                    redirectTo PostsAction

    action DeletePostAction { postId } = do
        post <- fetch postId
        deleteRecord post
        setSuccessMessage "Post deleted"
        redirectTo PostsAction

buildPost post = post
    |> fill @["title","body"]
    |> validateField #title nonEmpty
    |> validateField #body nonEmpty
    |> validateField #body isMarkdown

isMarkdown :: Text -> ValidatorResult
isMarkdown text =
    case MMark.parse "" text of
        Left _ -> Failure "Please provide valid Markdown"
        Right _ -> Success

Lot of unusual looking syntax :man_shrugging:

AstonJ

AstonJ

Just watching this now… looks pretty neat (and different!) you add tables and columns via the web gui - you even create controllers via it, don’t think I’ve seen that in a web framework before:

Where Next?

Popular Backend topics Top

First poster: bot
Release A powerful web framework written in Nim · planety/prologue. Prologue: A powerful web framework written in Nim We are proud to ...
New
First poster: bot
Pijul - The Mathematically Sound Version Control System Written in Rust. In this article, we’ll discuss Pijul - an alpha stage version c...
New
First poster: bot
This is a full alternative implementaion of the Rust language ontop of GCC which the goal to become fully upstream with the GNU toolchain...
New
First poster: bot
A set of utility functions for iterators, functions, and dictionaries. See the PyToolz documentation at https://toolz.readthedocs.io ...
New
finner
I thought it might be of interest to document some of the Java versioning tools that are available. Here is a very short list to start w...
New
First poster: bot
A little over a year ago I created the rib static site generator in Haskell based on Shake and ghcid. Later that year I built Neuron (...
New
OrlaghNeary
First time posting here and disclaimer, I work with Microsoft! I partner with Microsoft Research and there are so many cool projects unde...
New
First poster: bot
Turn (almost) any Python command line program into a full GUI application with one line
New
First poster: GermaVinsmoke
This guide collects some of the most common functions of the Elixir Programming Language and explain them conceptual and graphically in a...
New
crirvine
To my knowledge, up until now, all Business Process Management (BPM) platforms have been Java based. If you are a Java developer and have...
New

Other popular topics Top

AstonJ
What chair do you have while working… and why? Is there a ‘best’ type of chair or working position for developers?
New
Exadra37
Please tell us what is your preferred monitor setup for programming(not gaming) and why you have chosen it. Does your monitor have eye p...
New
AstonJ
I’ve been hearing quite a lot of comments relating to the sound of a keyboard, with one of the most desirable of these called ‘thock’, he...
New
AstonJ
If you are experiencing Rails console using 100% CPU on your dev machine, then updating your development and test gems might fix the issu...
New
Maartz
Hi folks, I don’t know if I saw this here but, here’s a new programming language, called Roc Reminds me a bit of Elm and thus Haskell. ...
New
AstonJ
If you get Can't find emacs in your PATH when trying to install Doom Emacs on your Mac you… just… need to install Emacs first! :lol: bre...
New
PragmaticBookshelf
Get the comprehensive, insider information you need for Rails 8 with the new edition of this award-winning classic. Sam Ruby @rubys ...
New
AstonJ
This is cool! DEEPSEEK-V3 ON M4 MAC: BLAZING FAST INFERENCE ON APPLE SILICON We just witnessed something incredible: the largest open-s...
New
AstonJ
This is a very quick guide, you just need to: Download LM Studio: https://lmstudio.ai/ Click on search Type DeepSeek, then select the o...
New
PragmaticBookshelf
A concise guide to MySQL 9 database administration, covering fundamental concepts, techniques, and best practices. Neil Smyth MySQL...
New