persistent-instances: Persistent instances of some useful types (vector, uuids, etc).

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Persistent instances of some useful types (vector, uuids, etc), this library contains several sub libraries so you only depend on what you need. Warning: Orphans.

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Properties

Versions	0.1.0.0
Change log	None available
Dependencies	base (>=4 && <5), bytestring (<0.13), path-pieces (<0.3), persistent (<2.19), text (<2.2), vector-sized (<1.7) [details]
License	MIT
Author	Eiko
Maintainer	eikochanowo@outlook.com
Category	Database
Source repo	head: git clone https://github.com/Eiko-Tokura/persistent-instances.git
Uploaded	by eiko at 2026-03-11T08:20:26Z

library persistent-instances:postgresql-vector

Modules

Database
- Persist
  - Postgresql
    - Database.Persist.Postgresql.Vector

library persistent-instances:uuid

Modules

Database
- Persist
  - Database.Persist.UUID

Downloads

persistent-instances-0.1.0.0.tar.gz [browse] (Cabal source package)
Package description (as included in the package)

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Readme for persistent-instances-0.1.0.0

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persistent-instances

Small persistent instance helpers for useful types, split into public sublibraries, so users can depend on only the pieces they need. (e.g. if you only use uuid, you won't need to depend on vector dependencies).

These are useful but there are no official instances defined for them.

Warning: these are orphan instances, be careful when using them in public libraries.

A future alternative to orphans would be defining a library specific newtype wrapper.

Available sublibraries

persistent-instances:uuid Exposes Database.Persist.UUID, contains instances for UUID in library uuid.
persistent-instances:postgresql-vector Exposes Database.Persist.Postgresql.Vector, contains instances for Data.Vector.Unboxed.Sized in vector-sized, suitable for pg_vector extension.

Usage

Add one or both sublibraries to build-depends:

build-depends:
    persistent-instances:uuid

build-depends:
    persistent-instances:postgresql-vector

Then import the corresponding module:

import Database.Persist.UUID

import Database.Persist.Postgresql.Vector