Deprecated

slug

Type-safe slugs for Yesod ecosystem

https://github.com/mrkkrp/slug

Version on this page:0.1.2
LTS Haskell 11.22:0.1.7@rev:4
Stackage Nightly 2018-06-23:0.1.7@rev:4
Latest on Hackage:0.1.7@rev:4

See all snapshots slug appears in

BSD-3-Clause licensed and maintained by Mark Karpov
This version can be pinned in stack with:slug-0.1.2@sha256:b9627d1d3b844f3df39968528726bcc2baceaabb185e801b80805b6cdae14ca8,3656

Module documentation for 0.1.2

Slug

License BSD3 Hackage Stackage Nightly Stackage LTS Build Status Coverage Status

This is slug implementation that plays nicely with Yesod ecosystem. Although it’s fairly easy to write this thing, slugs are useful and general enough to be coded once and be used again and again. So this little package eliminates some boilerplate you might find yourself writing.

Quick start

The package provides data type Slug that is instance of various type classes, so it can be used with Persistent or as part of route. It also works with aeson package.

The slugs are completely type-safe. When you have a Slug, you can be sure that there is a valid slug inside. Valid slug has the following qualities:

  • it’s not empty;

  • it consists only of alpha-numeric groups of characters (words) separated by '-' dashes in such a way that entire slug cannot start or end in a dash and also two dashes in a row cannot be found;

  • every character with defined notion of case is lower-cased.

To use the package with persistent models, just import Web.Slug and add it to model file:

MyEntity
  slug Slug
  …

Use it in route file like this:

/post/#Slug PostR GET

In Haskell code, create slugs from Text with mkSlug and extract their textual representation with unSlug. The following property holds:

mkSlug = mkSlug >=> mkSlug . unSlug

License

Copyright © 2015–2016 Mark Karpov

Distributed under BSD 3 clause license.

Changes

Slug 0.1.2

  • Improved error messages in parseJSON.

Slug 0.1.1

  • Add Read instance of Slug.

  • Add parseSlug and truncateSlug functions.

  • Functions (including instance methods) that parse Text that must be formatted as valid slug are case-sensitive now.

Slug 0.1.0

  • Initial release.