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clj-decline; a clojure validation library that sucks less by doing less

Home Page: http://joost.zeekat.nl/2011/03/12/announcement-clj-decline-validation-sucks/

Clojure 100.00%

clj-decline's Introduction

clj-decline is a validation library that hopefully will turn out to be
simple enough to be useful.

clj-decline does not place limits on what it can validate. It does not
restrict itself to web and will never do so. With regards to the kind
of rejection messages (errors) it can generate, the only restriction
is that they should be indexed by a key.

Read the RANT for the long story.

For now, the functions are all documented inline, and the best place
to look for examples is the test code.

An online copy of the inline documentation is at
http://joodie.github.com/clj-decline/

To prevent havock, I won't be releasing SNAPSHOT releases. Instead,
there will be as many minor releases as needed to push changes/fixes.

When updating to a new version, check the CHANGES file to see if
anything has changed in the API.

The releases are on clojars, so you can use your favorite build
tool. See http://clojars.org/clj-decline for the spec.

Copyright (C) 2011 Joost Diepenmaat, Zeekat Softwareontwikkeling

[email protected]

Distributed under the Eclipse Public License, the same as Clojure.

clj-decline's People

Contributors

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clj-decline's Issues

dynamic error messages support

I suggest adding error function support to "validation", so it would be possible to create errors based on invalid params. For example, reporting "Your title is 3 letter long, but is must be at least 10 letters".

(defn validation
  "Make a validation `v' from `predicate'. If (predicate args*) is false,
 (v args*) returns error set `errors', nil otherwise."
  [predicate error]
  (fn [& args]
    (if-not (apply predicate args)
      (if (fn? error) (error args) error)))

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