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Plumatic Schema Coercion

Plumatic Schema is a Clojure(Script) library for declarative data description and validation.

(require '[reitit.coercion.schema])
(require '[reitit.coercion :as coercion])
(require '[schema.core :as s])
(require '[reitit.core :as r])

(def router
  (r/router
    ["/:company/users/:user-id" {:name ::user-view
                                 :coercion reitit.coercion.schema/coercion
                                 :parameters {:path {:company s/Str
                                                     :user-id s/Int}}}]
    {:compile coercion/compile-request-coercers}))

(defn match-by-path-and-coerce! [path]
  (if-let [match (r/match-by-path router path)]
    (assoc match :parameters (coercion/coerce! match))))

Successful coercion:

(match-by-path-and-coerce! "/metosin/users/123")
; #Match{:template "/:company/users/:user-id",
;        :data {:name :user/user-view,
;               :coercion <<:schema>>
;               :parameters {:path {:company java.lang.String,
;                                   :user-id Int}}},
;        :result {:path #object[reitit.coercion$request_coercer$]},
;        :path-params {:company "metosin", :user-id "123"},
;        :parameters {:path {:company "metosin", :user-id 123}}
;        :path "/metosin/users/123"}

Failing coercion:

(match-by-path-and-coerce! "/metosin/users/ikitommi")
; => ExceptionInfo Request coercion failed...

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