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NAMESPACES
schema-tools
RECENT

    metosin/schema-tools

    Clojars

    Mar 27, 2018

    OWNER
    Metosin
    Tampere, Helsinki, Finland
    www.metosin.fi
    Readme

    Index of all namespaces


    « Project + dependencies

    Common utilities for Prismatic Schema

    schema-tools.coerceDocsSource

    VARS

    +json-coercions+ +string-coercions+ coerce coerce-or-error! coercer collection-matcher default-coercion-matcher filter-schema-keys forwarding-matcher json-coercion-matcher map-filter-matcher multi-matcher or-matcher safe-coerce-string safe-int string->boolean string->date string->double string->long string->number string->uuid string-coercion-matcher

    schema-tools.coreDocsSource

    VARS

    A any-keys any-keyword-keys AnyKeys AnyKeywordKeys assoc assoc-in

    D default dissoc dissoc-in

    E explicit-key explicit-key-set

    G get-in get-in-schema

    I index-in-schema

    K key-in-schema

    M maybe-anonymous merge

    O open-schema optional-keys

    R required-keys resolve-schema resolve-schema-description

    S schema-description schema-value schema-with-description select-keys select-schema single-sequence-element?

    T transform-keys

    U unwrap-sequence-schemas update update-in

    schema-tools.experimental.walkDocsSource
    Add walk support for schema.experimental.* Schemas.

Extends the WalkableSchema so requiring this namespace somewhere provides
global support.

Note: Walking through either abstract-map or extended-schema doesn't change
the other. I.e. if you have Animal and Cat, which extends Animal, and walk
through the Cat the Animal is not changed.
    schema-tools.implDocsSource

    VARS

    ->Default default default? map->Default SchemaValue

    schema-tools.swagger.coreDocsSource

    VARS

    swagger-spec

    schema-tools.utilDocsSource

    VARS

    dissoc-in map-keys path-vals

    schema-tools.walkDocsSource
    Provides walk function which can be used to transform schemas while
preserving their structure and type.

    VARS

    postwalk prewalk schema-record? walk WalkableSchema

    The README below is fetched from the published project artifact. Some relative links may be broken.

    Schema-tools Build Status Downloads Dependencies Status

    Common utilities for working with Prismatic Schema Maps, both Clojure & ClojureScript. * common Schema definitions: any-keys, any-keyword-keys, open-schema * schema-aware selectors: get-in, select-keys, select-schema * schema-aware transformers: assoc, dissoc, assoc-in, update-in, update, dissoc-in, merge, optional-keys, required-keys * removes the schema name and ns if the schema (value) has changed. * handle schema default values via default & default-coercion-matcher * meta-data helpers: schema-with-description schema-description, resolve-schema (clj only), resolve-schema-description (clj only) * coercion tools: or-matcher, map-filter-matcher, multi-matcher, coercer, coerce * Protocol-based walker for manipulating Schemas in schema-tools.walk: walk, prewalk and postwalk.

    API Docs.

    Latest version

    Clojars Project

    Requires Java 1.8.

    Examples

    Normal clojure.core functions don’t work well with Schemas:

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

(s/defschema Address {:street s/Str
                      (s/optional-key :city) s/Str
                      (s/required-key :country) {:name s/Str}})

;; where's my city?
(select-keys Address [:street :city])
; {:street java.lang.String}

; this should not return the original Schema name...
(s/schema-name (select-keys Address [:street :city]))
; Address

    With schema-tools:

    (require '[schema-tools.core :as st])

(st/select-keys Address [:street :city])
; {:street java.lang.String, #schema.core.OptionalKey{:k :city} java.lang.String}

(s/schema-name (st/select-keys Address [:street :city]))
; nil

    Coercion

    If a given value can’t be coerced to match a schema, ex-info is thrown (like schema.core/validate):

    (require '[schema-tools.coerce :as stc])

(def matcher (constantly nil))
(def coercer (stc/coercer String matcher))

(coercer 123)
; clojure.lang.ExceptionInfo: Could not coerce value to schema: (not (instance? java.lang.String 123))
;      error: (not (instance? java.lang.String 123))
;     schema: java.lang.String
;       type: :schema-tools.coerce/error
;      value: 123

(coercer "123")
; "123"

; same behavior with coerce (creates coercer on each invocation, slower)
(stc/coerce 123 String matcher)
(stc/coerce "123" String matcher)

    Coercion error :type can be overridden in both cases with an extra argument.

    (stc/coerce 123 String matcher :domain/horror)
; clojure.lang.ExceptionInfo: Could not coerce value to schema: (not (instance? java.lang.String 123))
;      error: (not (instance? java.lang.String 123))
;     schema: java.lang.String
;       type: :domain/horror
;      value: 123

    Select Schema

    Filtering out illegal schema keys (using coercion):

    (st/select-schema {:street "Keskustori 8"
                   :city "Tampere"
                   :description "Metosin HQ" ; disallowed-key
                   :country {:weather "-18" ; disallowed-key
                             :name "Finland"}}
                  Address)
; {:city "Tampere", :street "Keskustori 8", :country {:name "Finland"}}

    Filtering out illegal schema map keys using coercion with additional Json-coercion - in a single sweep:

    (s/defschema Beer {:beer (s/enum :ipa :apa)})

(def ipa {:beer "ipa" :taste "good"})

(st/select-schema ipa Beer)
; clojure.lang.ExceptionInfo: Could not coerce value to schema: {:beer (not (#{:ipa :apa} "ipa"))}
;     data: {:type :schema.core/error,
;            :schema {:beer {:vs #{:ipa :apa}}},
;            :value {:beer "ipa", :taste "good"},
;            :error {:beer (not (#{:ipa :apa} "ipa"))}}

(require '[schema.coerce :as sc])

(st/select-schema ipa Beer sc/json-coercion-matcher)
; {:beer :ipa}

    Usage

    See the tests.

    License

    Copyright © 2014-2018 Metosin Oy

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