Clojure Schema/Validation Libs

NOTES.md

Notes

• Most libraries do only validation. Schema does also coercion.

Prismatic Schema

Pros:

• Schemas are represented using collections and maps etc.
  • It's easy to modify existing schemas using general fns:
  • (s/defschema NewUser (dissoc User :_id))
• Provides coercion
  • Coerce valus from strings to anything
  • Useful when using with JSON

Cons:

• It's easy to lose propert order when schema is defined using hash-map
• It's hard to validate a property if validation depends on value of another property
• Provides "machine-readable" errors, but the errors usually are lists, e.g. (not (eq "123")) it's a bit hard to read those using Clojure
  • Could be fixed by implementing a library which implements some Protocol for each Schema
  • Schemas call macros/validation-error and create list describing the error

Manners

Vlad

Examine

Validateur

Red Tape

Mississippi

Metis

Herbert

Bouncer

Validateur

Verily