0.43.0

.gitlab-ci.yml

@@ -1,10 +1,5 @@
 image: registry.gitlab.com/openstapps/projectmanagement/node
 
-cache:
-  key: ${CI_COMMIT_REF_SLUG}
-  paths:
-    - node_modules
-
 before_script:
   - npm install
 

.mailmap

@@ -0,0 +1,5 @@
+Rainer Killinger <mail-openstapps@killinger.co> Rainer Killinger <git@killinger.co>
+Rainer Killinger <mail-openstapps@killinger.co> Rainer Killinger <killinge@hrz.uni-frankfurt.de>
+Rainer Killinger <mail-openstapps@killinger.co> Rainer Killinger <killinger@hrz.uni-frankfurt.de>
+Wieland Schöbl <wulkanat@gmail.com> wulkanat@gmail.com <wulkanat@gmail.com>
+Wieland Schöbl <wulkanat@gmail.com> Wieland Schöbl <wieland.schoebl@campus.tu-berlin.de>

CHANGELOG.md

@@ -1,3 +1,52 @@
+# [0.42.0](https://gitlab.com/openstapps/core/compare/v0.41.0...v0.42.0) (2021-02-16)
+
+
+
+# [0.41.0](https://gitlab.com/openstapps/core/compare/v0.40.0...v0.41.0) (2021-02-08)
+
+
+### Bug Fixes
+
+* add date, numeric range filter to SCSearchFilter ([8510f11](https://gitlab.com/openstapps/core/commit/8510f11d7b4c62a6b239a70f47fe07e8cc86ab63))
+
+
+
+# [0.40.0](https://gitlab.com/openstapps/core/compare/v0.39.0...v0.40.0) (2021-02-05)
+
+
+### Features
+
+* add range filter, date sorting support ([29bc006](https://gitlab.com/openstapps/core/commit/29bc00616e87a8d346d8c304fab2e3818921c75e))
+
+
+
+# [0.39.0](https://gitlab.com/openstapps/core/compare/v0.38.1...v0.39.0) (2020-12-01)
+
+
+### Features
+
+* extend property value translation retrival ([a246bde](https://gitlab.com/openstapps/core/commit/a246bdea84e0ca390be6ab38723d637626db87d2))
+
+
+
+## [0.38.1](https://gitlab.com/openstapps/core/compare/v0.38.0...v0.38.1) (2020-11-02)
+
+
+
+# [0.38.0](https://gitlab.com/openstapps/core/compare/v0.37.0...v0.38.0) (2020-10-30)
+
+
+
+# [0.37.0](https://gitlab.com/openstapps/core/compare/v0.36.0...v0.37.0) (2020-09-23)
+
+
+### Bug Fixes
+
+* remove keyword tag from steps ([c369c85](https://gitlab.com/openstapps/core/commit/c369c8520a2eed169555a35a50ce745c08e1f9da))
+* remove redundant property declaration ([66075ef](https://gitlab.com/openstapps/core/commit/66075ef99b95198a9cd5c0a396603e089221bcd9))
+
+
+
 # [0.36.0](https://gitlab.com/openstapps/core/compare/v0.35.0...v0.36.0) (2020-07-16)
 
 

README.md

@@ -35,16 +35,18 @@ node --require ts-node/register src/cli.ts routes PATH/TO/ROUTES.md
 Annotations are used to add additional informations to fields, which are used to autogenerate mappings from the core objects. 
 External dependencies can not be covered by the annotations. Documentation about some of the annotations can be found in: [typedoc](https://typedoc.org/guides/doccomments/)
 
-| annotation        | description                               | parameters    |
+| annotation        | description                                                                                                             | parameters                                                                       |
-|-------------------|-------------------------------------------|---------------|
+|-------------------|-------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------|
 | `@aggregatable`   | used for generating of aggregations of the field if the core schema is used to put data into a database/key-value store | whether the property is being used on the top type or across all types: `global` |
-| `@float`          | number field is interpreted as float      |               |
+| `@float`          | number field is interpreted as float                                                                                    |                                                                                  |
-| `@indexable`      | marks the type as indexable if the core schema is used to put data into a database/key-value store|               |
+| `@indexable`      | marks the type as indexable if the core schema is used to put data into a database/key-value store                      |                                                                                  |
-| `@integer`        | number field is interpreted as integer    |               |
+| `@integer`        | number field is interpreted as integer                                                                                  |                                                                                  |
-| `@keyword`        | string field is interpreted as keyword    |               |
+| `@keyword`        | string field is interpreted as keyword                                                                                  |                                                                                  |
-| `@sortable`       | field is sortable if the core schema is used to put data into a database/key-value store | sort method to be used: `ducet`, `price`, `distance` |
+| `@sortable`       | field is sortable if the core schema is used to put data into a database/key-value store. Fields are always sortable through generic sort, even without annotation.                                | sort method to be used: `ducet`, `price`, `distance`                             |
-| `@text`           | string field is interpreted as text       |               |
+| `@text`           | string field is interpreted as text                                                                                     |                                                                                  |
-| `@validatable`    | marks the type as validatable if the core schema is used to put data into a database/key-value store |               |
+| `@date`  | string field is interpreted as a date field | |
-| `@filterable`     | non-object/nested field is filterable if the core schema is used to put data into a database/key-value store    |               |
+| `@validatable`    | marks the type as validatable if the core schema is used to put data into a database/key-value store                    |                                                                                  |
-
+| `@filterable`     | non-object/nested field is filterable if the core schema is used to put data into a database/key-value store            |                                                                                  |
+| `@inheritTags`    | inherit all tags from another field                                                                                     | `[SCThingType]::[field]`                                                         |
 
+*Note: tags ignore casing, but for consistency they should use the variants proposed here.*

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@openstapps/core",
-  "version": "0.37.0",
+  "version": "0.43.0",
   "description": "StAppsCore - Generalized model of data",
   "keywords": [
     "Model",
@@ -25,50 +25,53 @@
     "preversion": "npm run prepublishOnly",
     "push": "git push && git push origin \"v$npm_package_version\"",
     "schema": "node --max-old-space-size=8192 --stack-size=10240 ./node_modules/.bin/openstapps-core-tools schema src lib/schema",
-    "test": "nyc mocha --require ts-node/register --require source-map-support/register --ui mocha-typescript test/*.spec.ts",
+    "test": "nyc mocha --require ts-node/register --recursive 'test/*.spec.ts'",
     "tslint": "tslint -p tsconfig.json -c tslint.json 'src/**/*.ts'"
   },
   "author": "Karl-Philipp Wulfert <krlwlfrt@gmail.com>",
   "contributors": [
     "Andreas Lehmann",
     "Anselm Stordeur <anselmstordeur@gmail.com>",
+    "Axel Nieder-Vahrenholz",
     "Benjamin Jöckel",
-    "Imran Hossain",
+    "Frank Nagel",
     "Jovan Krunić <jovan.krunic@gmail.com>",
     "Michel Jonathan Schmitz",
     "Rainer Killinger <mail-openstapps@killinger.co>",
+    "Roman Klopsch",
     "Sebastian Lange",
-    "Wieland Schöbl",
+    "Wieland Schöbl"
-    "Roman Klopsch"
   ],
   "dependencies": {
+    "@openstapps/core-tools": "0.19.0",
     "@types/geojson": "1.0.6",
     "@types/json-patch": "0.0.30",
-    "@types/node": "10.17.14",
+    "@types/json-schema": "7.0.7",
+    "@types/node": "14.14.37",
     "fast-clone": "1.5.13",
-    "http-status-codes": "2.1.2",
+    "fast-deep-equal": "3.1.3",
+    "http-status-codes": "2.1.4",
     "json-patch": "0.7.0",
-    "jsonschema": "1.2.5",
+    "json-schema": "0.3.0",
     "ts-optchain": "0.1.8"
   },
   "devDependencies": {
-    "@openstapps/configuration": "0.24.0",
+    "@openstapps/configuration": "0.27.0",
-    "@openstapps/core-tools": "0.14.0",
+    "@openstapps/logger": "0.6.0",
-    "@openstapps/logger": "0.5.0",
+    "@testdeck/mocha": "0.1.2",
-    "@types/chai": "4.2.12",
+    "@types/chai": "4.2.16",
     "@types/rimraf": "3.0.0",
-    "chai": "4.2.0",
+    "chai": "4.3.4",
     "conditional-type-checks": "1.0.5",
-    "conventional-changelog-cli": "2.1.0",
+    "conventional-changelog-cli": "2.1.1",
-    "mocha": "8.1.1",
+    "mocha": "8.3.2",
-    "mocha-typescript": "1.1.17",
     "nyc": "15.1.0",
     "rimraf": "3.0.2",
     "source-map-support": "0.5.19",
-    "ts-node": "9.0.0",
+    "ts-node": "9.1.1",
     "tslint": "6.1.3",
-    "typedoc": "0.14.2",
+    "typedoc": "0.18.0",
-    "typescript": "3.5.3"
+    "typescript": "3.8.3"
   },
   "nyc": {
     "all": true,

src/general/time.ts

@@ -18,6 +18,8 @@
  *
  * @pattern ^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$
  * @see https://gist.github.com/philipashlock/8830168
+ *
+ * @date
  */
 export type SCISO8601Date = string;
 /* tslint:enable */

src/protocol/errors/validation.ts

@@ -12,8 +12,8 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
+import {ValidationError} from '@openstapps/core-tools/lib/common';
 import {BAD_REQUEST} from 'http-status-codes';
-import {ValidationError} from 'jsonschema';
 import {SCError} from '../error';
 
 /**

src/protocol/routes/plugin-register.ts

@@ -13,7 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {OK} from 'http-status-codes';
-import {Schema} from 'jsonschema';
+import {JSONSchema7} from 'json-schema';
 import {SCInternalServerErrorResponse} from '../errors/internal-server-error';
 import {SCMethodNotAllowedErrorResponse} from '../errors/method-not-allowed';
 import {SCNotFoundErrorResponse} from '../errors/not-found';
@@ -78,12 +78,12 @@ export interface SCPluginMetaData {
   /**
    * How the requests of the plugin looks like, a JSON schema for validation
    */
-  requestSchema: Schema;
+  requestSchema: JSONSchema7;
 
   /**
    * How the responses of the plugin looks like, a JSON schema for validation
    */
-  responseSchema: Schema;
+  responseSchema: JSONSchema7;
 
   /**
    * The desired route, for example /feedback.

src/protocol/search/filter.ts

@@ -19,6 +19,7 @@ import {SCMap} from '../../general/map';
 import {SCSearchAvailabilityFilter} from './filters/availability';
 import {SCSearchBooleanFilter} from './filters/boolean';
 import {SCSearchDistanceFilter} from './filters/distance';
+import {SCSearchDateRangeFilter, SCSearchNumericRangeFilter} from './filters/range';
 import {SCSearchValueFilter} from './filters/value';
 
 /**
@@ -28,7 +29,9 @@ export type SCSearchFilterType =
   'availability'
   | 'boolean'
   | 'distance'
-  | 'value';
+  | 'value'
+  | 'date range'
+  | 'numeric range';
 
 /**
  * Structure of a filter instruction
@@ -57,4 +60,6 @@ export type SCSearchFilter =
   SCSearchAvailabilityFilter
   | SCSearchBooleanFilter
   | SCSearchDistanceFilter
-  | SCSearchValueFilter;
+  | SCSearchValueFilter
+  | SCSearchNumericRangeFilter
+  | SCSearchDateRangeFilter;

src/protocol/search/filters/range.ts

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2020 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {SCThingsField} from '../../../meta';
+import {SCSearchAbstractFilter, SCSearchAbstractFilterArguments} from '../filter';
+
+/**
+ * A date range filter
+ *
+ * Filter for documents with a date field that satisfies the given constraints
+ *
+ * @see https://www.elastic.co/guide/en/elasticsearch/reference/5.6/query-dsl-range-query.html#_date_format_in_range_queries
+ */
+export interface SCSearchDateRangeFilter extends SCSearchAbstractFilter<SCDateRangeFilterArguments> {
+  /**
+   * @see SCSearchAbstractFilter.type
+   */
+  type: 'date range';
+}
+
+/**
+ * A distance filter
+ *
+ * Filter for documents with a numeric field that satisfies the given constraints
+ *
+ * @see https://www.elastic.co/guide/en/elasticsearch/reference/5.6/query-dsl-range-query.html#query-dsl-range-query
+ */
+export interface SCSearchNumericRangeFilter extends SCSearchAbstractFilter<SCNumericRangeFilterArguments> {
+  /**
+   * @see SCSearchAbstractFilter.type
+   */
+  type: 'numeric range';
+}
+
+/**
+ * Additional arguments for date range filters
+ *
+ * Filter uses a plain string to allow for date math expressions
+ * @see https://www.elastic.co/guide/en/elasticsearch/client/net-api/current/date-math-expressions.html
+ */
+export interface SCDateRangeFilterArguments extends SCRangeFilterArguments<string> {
+  /**
+   * Optional date format specifier
+   *
+   * @see https://www.elastic.co/guide/en/elasticsearch/reference/5.6/query-dsl-range-query.html#_date_format_in_range_queries
+   */
+  format?: string;
+
+  /**
+   * Optional timezone specifier
+   *
+   * @see https://www.elastic.co/guide/en/elasticsearch/reference/5.6/query-dsl-range-query.html#_time_zone_in_range_queries
+   */
+  timeZone?: string;
+}
+
+/**
+ * Additional arguments for numeric range filters
+ */
+export type SCNumericRangeFilterArguments = SCRangeFilterArguments<number>;
+
+/**
+ * Additional arguments for range filters
+ *
+ * @see https://www.elastic.co/guide/en/elasticsearch/reference/5.6/query-dsl-range-query.html#query-dsl-range-query
+ */
+export interface SCRangeFilterArguments<T> extends SCSearchAbstractFilterArguments {
+  /**
+   * Bounds of the range
+   */
+  bounds: Bounds<T>;
+
+  /**
+   * Field where the filter will be applied
+   */
+  field: SCThingsField;
+}
+
+export interface Bounds<T> {
+  /**
+   * The lower bound
+   */
+  lowerBound?: Bound<T>;
+
+  /**
+   * The upper bound
+   */
+  upperBound?: Bound<T>;
+}
+
+export interface Bound<T> {
+  /**
+   * Limit of the bound
+   */
+  limit: T;
+
+  /**
+   * Bound mode
+   */
+  mode: 'inclusive' | 'exclusive';
+}

src/protocol/search/sort.ts

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2019 StApps
+ * Copyright (C) 2019, 2020 StApps
  * This program is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the Free
  * Software Foundation, version 3.
@@ -16,6 +16,7 @@ import {SCMap} from '../../general/map';
 import {SCThingsField} from '../../meta';
 import {SCDistanceSort} from './sorts/distance';
 import {SCDucetSort} from './sorts/ducet';
+import {SCGenericSort} from './sorts/generic';
 import {SCPriceSort} from './sorts/price';
 
 /**
@@ -51,9 +52,9 @@ export interface SCSearchAbstractSortArguments extends SCMap<unknown> {
 /**
  * Type of a sort instruction
  */
-export type SCSearchSortType = 'distance' | 'price' | 'ducet';
+export type SCSearchSortType = 'distance' | 'price' | 'ducet' | 'generic';
 
 /**
  * A sort instruction
  */
-export type SCSearchSort = SCDistanceSort | SCPriceSort | SCDucetSort;
+export type SCSearchSort = SCDistanceSort | SCPriceSort | SCDucetSort | SCGenericSort;

src/protocol/search/sorts/generic.ts

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2020 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {SCSearchAbstractSort, SCSearchAbstractSortArguments} from '../sort';
+
+/**
+ * Sort instruction for generic sort such as date
+ */
+export interface SCGenericSort extends SCSearchAbstractSort<SCSearchAbstractSortArguments> {
+  /**
+   * @see SCSearchAbstractSort.type
+   */
+  type: 'generic';
+}

src/things/abstract/creative-work.ts

@@ -12,7 +12,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import {SCLanguage, SCMetaTranslations, SCTranslations} from '../../general/i18n';
+import {SCLanguageCode, SCMetaTranslations, SCTranslations} from '../../general/i18n';
 import {SCISO8601Date} from '../../general/time';
 import {SCOrganizationWithoutReferences} from '../organization';
 import {SCPersonWithoutReferences} from '../person';
@@ -30,6 +30,12 @@ import {
  */
 export interface SCCreativeWorkWithoutReferences
   extends SCThingWithoutReferences, SCThingThatCanBeOfferedWithoutReferences {
+
+  /**
+   * Languages this creative work is available in
+   */
+  availableLanguages?: SCLanguageCode[];
+
   /**
    * Date the creative work was published
    *
@@ -38,9 +44,11 @@ export interface SCCreativeWorkWithoutReferences
   datePublished?: SCISO8601Date;
 
   /**
-   * List of languages this creative work is written/recorded/... in
+   * Languages this creative work is written/recorded/... in
+   *
+   * @filterable
    */
-  inLanguages?: SCLanguage[];
+  inLanguage?: SCLanguageCode;
 
   /**
    * Keywords of the creative work
@@ -103,9 +111,10 @@ export class SCCreativeWorkMeta
     de: {
       ...SCThingMeta.getInstance<SCThingMeta>().fieldTranslations.de,
       ...SCThingThatCanBeOfferedMeta.getInstance().fieldTranslations.de,
-      authors: 'Authoren',
+      authors: 'Autoren',
+      availableLanguages: 'verfügbare Übersetzungen',
       datePublished: 'Veröffentlichungsdatum',
-      inLanguages: 'verfügbare Übersetzungen',
+      inLanguage: 'Inhaltssprache',
       keywords: 'Schlagwörter',
       publishers: 'Verleger',
     },
@@ -113,8 +122,9 @@ export class SCCreativeWorkMeta
       ...SCThingMeta.getInstance<SCThingMeta>().fieldTranslations.en,
       ...SCThingThatCanBeOfferedMeta.getInstance().fieldTranslations.en,
       authors: 'authors',
+      availableLanguages: 'available languages',
       datePublished: 'release date',
-      inLanguages: 'available Languages',
+      inLanguage: 'content language',
       keywords: 'keywords',
       publishers: 'publishers',
     },

src/things/dish.ts

@@ -91,6 +91,13 @@ export interface SCDish
 
 export interface SCDishTranslatableProperties
   extends SCThingWithCategoriesTranslatableProperties, SCThingThatCanBeOfferedTranslatableProperties {
+  /**
+   * Additives of the dish
+   *
+   * @filterable
+   * @keyword
+   */
+  additives?: string[];
   /**
    * Characteristics of the dish
    */

src/things/semester.ts

@@ -29,7 +29,7 @@ export interface SCSemesterWithoutReferences
    * The short name of the semester, using the given pattern.
    *
    * @filterable
-   * @pattern ^(WS|SS) [0-9]{4}(/[0-9]{2})?$
+   * @pattern ^(WS|SS|WiSe|SoSe) [0-9]{4}(/[0-9]{2})?$
    * @keyword
    */
   acronym: string;

src/translator.ts

@@ -13,8 +13,9 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import clone = require('fast-clone');
+import equal = require('fast-deep-equal/es6');
 import {Defined, TSOCType} from 'ts-optchain';
-import {SCTranslations} from './general/i18n';
+import {SCLanguageCode} from './general/i18n';
 import {isThing} from './guards';
 import {SCClasses} from './meta';
 import {SCThing, SCThingType} from './things/abstract/thing';
@@ -27,13 +28,32 @@ const standardCacheSize = 200;
  */
 export class SCThingTranslator {
 
+  /**
+   * Getter for language property
+   */
+  get language(): SCLanguageCode {
+    return this._language;
+  }
+
+  /**
+   * Setter for language property. Also flushes translation cache
+   *
+   * @param language The language the translator instance will use from now on
+   */
+  set language(language: SCLanguageCode) {
+    if (language !== this._language) {
+      this.cache.flush();
+    }
+    this._language = language;
+  }
+
   /**
    * Property representing the translators target language
    */
-  private _language: keyof SCTranslations<SCThing>;
+  private _language: SCLanguageCode;
+
   /**
-   * Property representing the translators base language
+   * LRU cache containing already translated SCThings
-   * This means every translation is given for this language
    */
   private readonly cache: LRUCache<SCThing>;
 
@@ -42,36 +62,23 @@ export class SCThingTranslator {
    */
   private readonly metaClasses: typeof SCClasses;
 
+  /**
+   * LRU cache containing SCThings translations have been provided for
+   */
+  private readonly sourceCache: LRUCache<SCThing>;
+
   /**
    * @example
    * // returns translator instance for german
    * new SCThingTranslator('de');
    */
-  constructor(language: keyof SCTranslations<SCThing>, cacheCapacity: number = standardCacheSize) {
+  constructor(language: SCLanguageCode, cacheCapacity: number = standardCacheSize) {
     this.cache = new LRUCache(cacheCapacity);
+    this.sourceCache = new LRUCache(cacheCapacity);
     this._language = language;
     this.metaClasses = SCClasses;
   }
 
-  /**
-   * Getter for language property
-   */
-  get language(): keyof SCTranslations<SCThing> {
-    return this._language;
-  }
-
-  /**
-   * Setter for language property. Also flushes translation cache
-   *
-   * @param language The language the translator instance will use from now on
-   */
-  set language(language: keyof SCTranslations<SCThing>) {
-    if (language !== this._language) {
-      this.cache.flush();
-    }
-    this._language = language;
-  }
-
   /**
    * Get field value translation recursively
    *
@@ -101,8 +108,8 @@ export class SCThingTranslator {
    * @param language The language the thing property values are translated to
    * @returns The thing with all known meta values translated
    */
-  private getAllMetaFieldTranslations<T extends SCThing>(thingType: SCThingType,
+  private getAllMetaFieldTranslations(thingType: SCThingType,
-                                                         language: keyof SCTranslations<T>): object | undefined {
+                                      language: SCLanguageCode): object | undefined {
     const fieldTranslations = {};
     const metaClass = this.getMetaClassInstance(thingType);
     if (typeof metaClass === 'undefined') {
@@ -151,7 +158,7 @@ export class SCThingTranslator {
    * @returns The thing with translated meta field values
    */
   private replaceAvailableMetaFieldValueTranslations(instance: any,
-                                                     language: keyof SCTranslations<any>): any {
+                                                     language: SCLanguageCode): any {
     const metaClass = this.getMetaClassInstance(instance.type);
     if (typeof metaClass === 'undefined') {
       return instance;
@@ -181,6 +188,60 @@ export class SCThingTranslator {
     return instance;
   }
 
+  /**
+   * Recursively translates the given object in-place
+   * Translated values overwrite current values (destructive)
+   *
+   * @param instance The thing / object that will be translated
+   * @returns The thing translated
+   */
+  private translateThingInPlaceDestructively<T>(instance: T): T {
+    const targetLanguage = this.language;
+
+    let nextInstance = instance as any;
+    // Recursively call this function on all nested SCThings, arrays and objects
+    Object.keys(nextInstance)
+      .forEach((key) => {
+        if (
+          isThing(nextInstance[key]) ||
+          nextInstance[key] instanceof Array ||
+          nextInstance[key] instanceof Object) {
+            nextInstance[key] = this.translateThingInPlaceDestructively(nextInstance[key]);
+        }
+      });
+
+    // Spread variable translations given by the connector into thing
+    if (typeof nextInstance.translations?.[targetLanguage] !== 'undefined') {
+      nextInstance = {...nextInstance, ...nextInstance.translations![targetLanguage]} as T;
+    }
+    // Spread known translations from meta classes into (partly) translated thing
+    this.replaceAvailableMetaFieldValueTranslations(nextInstance, targetLanguage);
+
+    return nextInstance;
+  }
+
+  /**
+   * Recursively translates the given object in-place
+   * Translated values overwrite current values (destructive)
+   *
+   * @param instance The thing / object that will be translated
+   * @returns The thing translated
+   */
+  public translate<T extends SCThing>(thing: T): T {
+    if (equal(this.sourceCache.get(thing), thing)) {
+      const cachedInstance = this.cache.get(thing);
+      if (typeof cachedInstance !== 'undefined') {
+        return cachedInstance as T;
+      }
+    }
+    const translatedInstance = this.translateThingInPlaceDestructively(clone(thing));
+    delete translatedInstance.translations;
+    this.cache.putObject(translatedInstance);
+    this.sourceCache.putObject(thing);
+
+    return translatedInstance as T;
+  }
+
   /**
    * Get field value translation recursively
    * @example
@@ -189,23 +250,26 @@ export class SCThingTranslator {
    * // or
    * const dishTranslatedAccess = translator.translate(dish);
    * dishTranslatedAccess.offers[0].inPlace.categories[1]();
-   * // undoing the TSTSOCType<T>
+   * // undoing the TSOCType<T>
    * const dishAsBefore: SCDish = dishTranslatedAccess()!;
-   * @param data Top level object that gets passed through the recursion
+   * @param thing Top level object that gets passed through the recursion
    * @returns an TSOCType<T> object allowing for access to translations or a translated value(s)
    */
-  public translate<T extends SCThing>(data: T): TSOCType<T> {
+  public translatedAccess<T extends SCThing>(thing: T): TSOCType<T> {
     return new Proxy(
-      ((defaultValue?: Defined<T>) => (data == null ? defaultValue : data)) as TSOCType<T>,
+      ((defaultValue?: Defined<T>) => (thing == null ? defaultValue : thing)) as TSOCType<T>,
       {
         get: (target, key) => {
           const obj: any = target();
-          const objTranslatedFromCache = this.cache.get(data);
+          if (equal(this.sourceCache.get(thing), thing)) {
-          if (typeof objTranslatedFromCache !== 'undefined') {
+            const objTranslatedFromCache = this.cache.get(thing);
-            return this.deeptranslate((objTranslatedFromCache as any)[key]);
+            if (typeof objTranslatedFromCache !== 'undefined') {
+              return this.deeptranslate((objTranslatedFromCache as any)[key]);
+            }
           }
-          const objTranslated = this.translateWholeThingDestructively(clone(obj));
+          const objTranslated = this.translateThingInPlaceDestructively(clone(obj));
           this.cache.putObject(objTranslated);
+          this.sourceCache.putObject(thing);
 
           return this.deeptranslate(objTranslated[key]);
         },
@@ -219,71 +283,31 @@ export class SCThingTranslator {
    * @example
    * const translatedMetaDish = translator.translatedPropertyNames<SCCourseOfStudies>(SCThingType.CourseOfStudies);
    * @param type The type whose property names will be translated
-   * @param language The language all property names will be translated to
    * @returns An object with the properties of the SCThingType where the values are the known property tranlations
    */
-  public translatedPropertyNames<T extends SCThing>(type: SCThingType,
+  public translatedPropertyNames<T extends SCThing>(type: SCThingType): T | undefined {
-                                                    language?: keyof SCTranslations<T>): T | undefined {
+    return this.getAllMetaFieldTranslations(type, this.language) as T;
-    const targetLanguage = (typeof language !== 'undefined') ? language : this.language;
-
-    return this.getAllMetaFieldTranslations(type, targetLanguage) as T;
   }
 
   /**
-   * Given a SCThingType this function will translate it
+   * Given a SCThingType and a corresponding property name it returns the known property value translation
-   * 
+   * Access pattern to the meta object containing the translation can be thought of as type.field[key] with key being optional
-   * @param type The type that will be translated
+   * @example
-   * @param language The language the type will be translated to
+   * const singleValueTranslation = translator.translatedPropertyValue(SCThingType.Dish, 'categories', 'main dish');
-   * @returns Known translation of type parameter
+   * @param type The type for whose property values a translation is required
+   * @param field The property for which a translation is required
+   * @param key If specified tries to access the field with this key
+   * @returns Known translation for the property
    */
-  public translatedThingType<T extends unknown>(type: SCThingType,
+  public translatedPropertyValue(type: SCThingType,
-                                                language?: keyof SCTranslations<T>): string {
+                                 field: string,
-    const targetLanguage = (typeof language !== 'undefined') ? language : this.language;
+                                 key?: string): string | undefined {
-    const metaClass = this.getMetaClassInstance(type);
+    const fieldValueTranslations = this.getMetaClassInstance(type).fieldValueTranslations[this.language] ??
+                                   this.getMetaClassInstance(type).fieldValueTranslations.en;
+    const fieldTranslation = fieldValueTranslations?.[field];
 
-    if (typeof metaClass.fieldValueTranslations[targetLanguage] !== 'undefined' &&
+    return fieldTranslation?.[key ?? ''] ?? key ?? fieldTranslation;
-        typeof metaClass.fieldValueTranslations[targetLanguage].type !== 'undefined') {
-      return metaClass.fieldValueTranslations[targetLanguage].type as string ;
-    }
-
-    return type;
   }
-
-  /**
-   * Recursively translates the given object in-place
-   * Translated values overwrite current values (destructive)
-   *
-   * @param instance The thing / object that will be translated
-   * @param language The language the thing / object is translated to
-   * @returns The thing translated
-   */
-  public translateWholeThingDestructively(instance: any,
-                                          language?: keyof SCTranslations<any>): any {
-    const targetLanguage = (typeof language !== 'undefined') ? language : this.language;
-    let nextInstance = instance;
-    // Recursively call this function on all nested SCThings, arrays and objects
-    Object.keys(nextInstance)
-      .forEach((key) => {
-        if (
-          isThing((nextInstance as any)[key]) ||
-          nextInstance[key] instanceof Array ||
-          nextInstance[key] instanceof Object) {
-          nextInstance[key] = this.translateWholeThingDestructively(nextInstance[key], targetLanguage);
-        }
-      });
-
-    // Spread variable translations given by the connector into thing
-    if (typeof nextInstance.translations !== 'undefined') {
-      if (typeof nextInstance.translations![targetLanguage] !== 'undefined') {
-        nextInstance = {...nextInstance, ...nextInstance.translations![targetLanguage]} as typeof instance;
-      }
-    }
-    // Spread known translations from meta classes into (partly) translated thing
-    this.replaceAvailableMetaFieldValueTranslations(nextInstance, targetLanguage);
-
-    return nextInstance;
-  }
-
 }
 
 /**

test/guards.spec.ts

@@ -13,7 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {expect} from 'chai';
-import {slow, suite, test, timeout} from 'mocha-typescript';
+import {slow, suite, test, timeout} from '@testdeck/mocha';
 import {SCBulkResponse} from '../src/protocol/routes/bulk-request';
 import {SCMultiSearchResponse} from '../src/protocol/routes/search-multi';
 import {SCSearchResponse} from '../src/protocol/routes/search';

test/resources/Book.1.json

@@ -21,12 +21,7 @@
         "name": "Symposion Publishing"
       }
     ],
-    "inLanguages": [
+    "inLanguage": "de",
-      {
-        "name": "german",
-        "code": "de"
-      }
-    ],
     "bookEdition": "2., überarb. u. erw. Aufl.",
     "isbn": "3936608776",
     "numberOfPages": 537,

test/resources/PluginRegisterRequest.1.json

@@ -6,7 +6,7 @@
       "address": "http://foo.com:1234",
       "name": "Foo Plugin",
       "requestSchema": {
-        "$schema": "http://json-schema.org/draft-06/schema#",
+        "$schema": "http://json-schema.org/draft-07/schema#",
         "definitions": {
           "SCFooPluginRequest": {
             "type": "object",
@@ -33,10 +33,10 @@
         ],
         "additionalProperties": false,
         "description": "User query",
-        "id": "https://core.stapps.tu-berlin.de/v0.18.0/lib/schema/SCFooPluginRequest.json"
+        "$id": "https://core.stapps.tu-berlin.de/v0.18.0/lib/schema/SCFooPluginRequest.json"
       },
       "responseSchema": {
-        "$schema": "http://json-schema.org/draft-06/schema#",
+        "$schema": "http://json-schema.org/draft-07/schema#",
         "definitions": {
           "SCFooPluginResponse": {
             "type": "object",
@@ -65,7 +65,7 @@
         ],
         "additionalProperties": false,
         "description": "A response to a query",
-        "id": "https://core.stapps.tu-berlin.de/v0.18.0/lib/schema/SCFooPluginResponse.json"
+        "$id": "https://core.stapps.tu-berlin.de/v0.18.0/lib/schema/SCFooPluginResponse.json"
       },
       "route": "/foo"
     }

test/resources/Semester.2.json

@@ -4,9 +4,9 @@
     "uid": "7cebbc3e-0a21-5371-ab0d-f7ba12f53dbd",
     "type": "semester",
     "name": "Sommersemester 2018",
-    "acronym": "SS 2018",
+    "acronym": "SoSe 2018",
     "alternateNames": [
-      "SoSe 2018"
+      "Sommer 2018"
     ],
     "startDate": "2018-04-01",
     "endDate": "2018-09-30",

test/routes.spec.ts

@@ -13,7 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {expect} from 'chai';
-import {slow, suite, test, timeout} from 'mocha-typescript';
+import {slow, suite, test, timeout} from '@testdeck/mocha';
 import {SCBulkRoute} from '../src/protocol/routes/bulk-request';
 import {SCBulkAddRoute} from '../src/protocol/routes/bulk-add';
 import {SCThingUpdateRoute} from '../src/protocol/routes/thing-update';

test/schema.spec.ts

@@ -18,7 +18,7 @@ import {Logger} from '@openstapps/logger';
 import {fail} from 'assert';
 import {expect} from 'chai';
 import {mkdirSync} from 'fs';
-import {slow, suite, test, timeout} from 'mocha-typescript';
+import {slow, suite, test, timeout} from '@testdeck/mocha';
 import {join, resolve} from 'path';
 import {DeclarationReflection, ProjectReflection} from 'typedoc';
 import {ArrayType, IntrinsicType, ReferenceType, StringLiteralType, Type, UnionType} from 'typedoc/dist/lib/models';

test/translator.spec.ts

@@ -14,8 +14,8 @@
  */
 import {expect} from 'chai';
 import clone = require('fast-clone');
-import {slow, suite, test, timeout} from 'mocha-typescript';
+import {slow, suite, test, timeout} from '@testdeck/mocha';
-import {SCThingOriginType, SCThingType} from '../src/things/abstract/thing';
+import {SCThingOriginType, SCThingType, SCThingRemoteOrigin} from '../src/things/abstract/thing';
 import {SCBuildingWithoutReferences} from '../src/things/building';
 import {SCDish, SCDishMeta} from '../src/things/dish';
 import {SCSetting, SCSettingInputType} from '../src/things/setting';
@@ -105,142 +105,182 @@ const setting: SCSetting = {
 };
 
 const translator = new SCThingTranslator('de');
-// tslint:disable-next-line:no-eval
+const translatorEN = new SCThingTranslator('en');
-const languageNonExistant = eval("'jp'");
 // this will simulate a translator always utilizing the base language translations
-const translatorWithFallback = new SCThingTranslator(languageNonExistant);
+const translatorWithFallback = new SCThingTranslator('tt');
+
+const translatedThingDE = translator.translate(dish);
+const translatedThingFallback = translatorWithFallback.translate(dish);
 
 // tslint:disable:max-line-length member-ordering newline-per-chained-call prefer-function-over-method completed-docs TranslationSpecInplace
 @suite(timeout(10000), slow(5000))
 export class TranslationSpecInplace {
   @test
-  public directEnumSingleValue () {
+  public directEnumSingleValue() {
-    expect(translator.translate(setting).inputType()).to.equal('einfache Auswahl');
+    expect(translator.translatedAccess(setting).inputType()).to.equal('einfache Auswahl');
   }
 
   @test
   public directStringLiteralType() {
-    expect(translator.translate(dish).type()).to.equal('Essen');
+    expect(translator.translatedAccess(dish).type()).to.equal('Essen');
+    expect(translatedThingDE.type).to.equal('Essen');
   }
 
   @test
   public directStringProperty() {
-    expect(translator.translate(dish).name()).to.equal('de-dish-name');
+    expect(translator.translatedAccess(dish).name()).to.equal('de-dish-name');
+    expect(translatedThingDE.name).to.equal('de-dish-name');
+
   }
 
   @test
   public directArrayOfString() {
-    expect(translator.translate(dish).characteristics()).to.deep
+    expect(translator.translatedAccess(dish).characteristics()).to.deep
       .equal([{name: 'de-characteristic0'}, {name: 'de-characteristic1'}]);
+    expect(translatedThingDE.characteristics).to.deep
+    .equal([{name: 'de-characteristic0'}, {name: 'de-characteristic1'}]);
   }
 
   @test
   public directArrayOfStringSubscript() {
-    expect(translator.translate(dish).characteristics[1]()).to.deep.equal({name: 'de-characteristic1'});
+    expect(translator.translatedAccess(dish).characteristics[1]()).to.deep.equal({name: 'de-characteristic1'});
+    expect(translatedThingDE.characteristics![1]).to.deep.equal({name: 'de-characteristic1'});
   }
 
   @test
   public directMetaArrayOfString() {
-    expect(translator.translate(dish).categories()).to.deep.equal(['Hauptgericht', 'Nachtisch']);
+    expect(translator.translatedAccess(dish).categories()).to.deep.equal(['Hauptgericht', 'Nachtisch']);
+    expect(translatedThingDE.categories).to.deep.equal(['Hauptgericht', 'Nachtisch']);
   }
 
   @test
   public directMetaArrayOfStringSubscript() {
-    expect(translator.translate(dish).categories[1]()).to.equal('Nachtisch');
+    expect(translator.translatedAccess(dish).categories[1]()).to.equal('Nachtisch');
+    expect(translatedThingDE.categories[1]).to.equal('Nachtisch');
   }
 
   @test
   public nestedStringLiteralType() {
-    expect(translator.translate(dish).offers[0].inPlace.type()).to.equal('Gebäude');
+    expect(translator.translatedAccess(dish).offers[0].inPlace.type()).to.equal('Gebäude');
+    expect(translatedThingDE.offers![0].inPlace!.type).to.equal('Gebäude');
   }
 
   @test
   public nestedStringProperty() {
-    expect(translator.translate(dish).offers[0].inPlace.name()).to.equal('de-space-name');
+    expect(translator.translatedAccess(dish).offers[0].inPlace.name()).to.equal('de-space-name');
+    expect(translatedThingDE.offers![0].inPlace!.name).to.equal('de-space-name');
   }
 
   @test
   public nestedMetaArrayOfString() {
-    expect(translator.translate(dish).offers[0].inPlace.categories()).to.deep.equal(['Büro', 'Bildung']);
+    expect(translator.translatedAccess(dish).offers[0].inPlace.categories()).to.deep.equal(['Büro', 'Bildung']);
+    expect(translatedThingDE.offers![0].inPlace!.categories).to.deep.equal(['Büro', 'Bildung']);
   }
 
   @test
   public nestedMetaArrayOfStringSubscript() {
-    expect(translator.translate(dish).offers[0].inPlace.categories[1]()).to.equal('Bildung');
+    expect(translator.translatedAccess(dish).offers[0].inPlace.categories[1]()).to.equal('Bildung');
+    expect(translatedThingDE.offers![0].inPlace!.categories[1]).to.equal('Bildung');
   }
 
   @test
   public directStringLiteralTypeFallback() {
-    expect(translatorWithFallback.translate(dish).type()).to.equal('dish');
+    expect(translatorWithFallback.translatedAccess(dish).type()).to.equal('dish');
+    expect(translatedThingFallback.type).to.equal('dish');
   }
 
   @test
   public directStringPropertyFallback() {
-    expect(translatorWithFallback.translate(dish).name()).to.equal('base-dish-name');
+    expect(translatorWithFallback.translatedAccess(dish).name()).to.equal('base-dish-name');
+    expect(translatedThingFallback.name).to.equal('base-dish-name');
+
   }
 
   @test
   public directArrayOfStringSubscriptFallback() {
-    expect(translatorWithFallback.translate(dish).characteristics[1]())
+    expect(translatorWithFallback.translatedAccess(dish).characteristics[1]())
+      .to.deep.equal({name: 'base-characteristic1'});
+    expect(translatedThingFallback.characteristics![1])
       .to.deep.equal({name: 'base-characteristic1'});
   }
 
   @test
   public directMetaArrayOfStringFallback() {
-    expect(translatorWithFallback.translate(dish).categories()).to.deep.equal(['main dish', 'dessert']);
+    expect(translatorWithFallback.translatedAccess(dish).categories()).to.deep.equal(['main dish', 'dessert']);
+    expect(translatedThingFallback.categories).to.deep.equal(['main dish', 'dessert']);
   }
 
   @test
   public directMetaArrayOfStringSubscriptFallback() {
-    expect(translatorWithFallback.translate(dish).categories[1]()).to.equal('dessert');
+    expect(translatorWithFallback.translatedAccess(dish).categories[1]()).to.equal('dessert');
+    expect(translatedThingFallback.categories[1]).to.equal('dessert');
   }
 
   @test
   public nestedStringLiteralTypeFallback() {
-    expect(translatorWithFallback.translate(dish).offers[0].inPlace.type()).to.equal('building');
+    expect(translatorWithFallback.translatedAccess(dish).offers[0].inPlace.type()).to.equal('building');
+    expect(translatedThingFallback.offers![0].inPlace!.type).to.equal('building');
   }
 
   @test
   public nestedStringPropertyFallback() {
-    expect(translatorWithFallback.translate(dish).offers[0].inPlace.name()).to.equal('base-space-name');
+    expect(translatorWithFallback.translatedAccess(dish).offers[0].inPlace.name()).to.equal('base-space-name');
+    expect(translatedThingFallback.offers![0].inPlace!.name).to.equal('base-space-name');
   }
 
   @test
   public nestedMetaArrayOfStringFallback() {
-    expect(translatorWithFallback.translate(dish).offers[0].inPlace.categories())
+    expect(translatorWithFallback.translatedAccess(dish).offers[0].inPlace.categories())
+      .to.deep.equal(['office', 'education']);
+    expect(translatedThingFallback.offers![0].inPlace!.categories)
       .to.deep.equal(['office', 'education']);
   }
 
   @test
   public nestedMetaArrayOfStringSubscriptFallback() {
-    expect(translatorWithFallback.translate(dish).offers[0].inPlace.categories[1]()).to.equal('education');
+    expect(translatorWithFallback.translatedAccess(dish).offers[0].inPlace.categories[1]()).to.equal('education');
+    expect(translatedThingFallback.offers![0].inPlace!.categories[1]).to.equal('education');
   }
 
   @test
   public directStringLiteralTypeUndefined() {
     // tslint:disable-next-line:no-eval
     const undefinedThing = eval('(x) => undefined;');
-    expect(translator.translate(undefinedThing())('defaultValue')).to.equal('defaultValue');
+    expect(translator.translatedAccess(undefinedThing())('defaultValue')).to.equal('defaultValue');
-    expect(translator.translate(dish).name('defaultValue')).to.not.equal('defaultValue');
+    expect(translator.translatedAccess(dish).name('defaultValue')).to.not.equal('defaultValue');
   }
 
   @test
   public nestedMetaArrayOfStringSubscriptUndefined() {
     // tslint:disable-next-line: no-eval
-    const workingTranslation = eval('translator.translate(dish).offers[0].inPlace.categories[1](\'printer\');');
+    const workingTranslation = eval('translator.translatedAccess(dish).offers[0].inPlace.categories[1](\'printer\');');
     // tslint:disable-next-line: no-eval
-    const defaultValueTranslation = eval('translator.translate(dish).offers[0].inPlace.categories[1234](\'printer\');');
+    const defaultValueTranslation = eval('translator.translatedAccess(dish).offers[0].inPlace.categories[1234](\'printer\');');
 
     expect(defaultValueTranslation).to.equal('printer');
     expect(workingTranslation).to.not.equal('printer');
   }
 
+  @test
+  public reaccessWithChangedSourceOmitsLRUCache() {
+    const translatorDE = new SCThingTranslator('de');
+    const dishCopy = clone(dish);
+    const translatedDish = translatorDE.translatedAccess(dish);
+    const distructivelyTranslatedDish = translatorDE.translate(dish);
+
+    (dishCopy.origin as SCThingRemoteOrigin).name = 'tranlator.spec';
+    expect(translatorDE.translatedAccess(dishCopy)).not.to.deep.equal(translatedDish);
+    expect(translatorDE.translate(dishCopy)).not.to.equal(distructivelyTranslatedDish);
+  }
+
   @test
   public changingTranslatorLanguageFlushesItsLRUCache() {
     const translatorDE = new SCThingTranslator('de');
-    expect(translatorDE.translate(dish).name()).to.equal('de-dish-name');
+    expect(translatorDE.translatedAccess(dish).name()).to.equal('de-dish-name');
+    expect(translatorDE.translate(dish).name).to.equal('de-dish-name');
     translatorDE.language = 'en';
-    expect(translatorDE.translate(dish).name()).to.equal('base-dish-name');
+    expect(translatorDE.translatedAccess(dish).name()).to.equal('base-dish-name');
+    expect(translatorDE.translate(dish).name).to.equal('base-dish-name');
   }
 
   @test
@@ -250,7 +290,7 @@ export class TranslationSpecInplace {
     for (let i = 0; i < 201; i++) {
       const anotherDish = Object.assign({}, dish);
       anotherDish.uid = String(i);
-      expect(translatorDE.translate(anotherDish).name()).to.equal('de-dish-name');
+      expect(translatorDE.translatedAccess(anotherDish).name()).to.equal('de-dish-name');
     }
   }
 }
@@ -262,22 +302,32 @@ export class MetaTranslationSpec {
   @test
   public consistencyWithMetaClass() {
     const dishMetaTranslationsDE = translator.translatedPropertyNames(dish.type);
-    const dishMetaTranslationsEN = translator.translatedPropertyNames(dish.type, 'en');
+    const dishMetaTranslationsEN = translatorEN.translatedPropertyNames(dish.type);
     expect(dishMetaTranslationsEN).to.not.deep.equal(dishMetaTranslationsDE);
     expect(dishMetaTranslationsDE).to.deep.equal(SCDishMeta.getInstance().fieldTranslations.de);
     expect(dishMetaTranslationsEN).to.deep.equal(SCDishMeta.getInstance().fieldTranslations.en);
   }
 
   @test
-  public retrieveTranslatedThingType() {
+  public retrieveTranslatedPropertyValueType() {
-    const dishTypeDE = translator.translatedThingType(dish.type);
+    const dishTypeDE = translator.translatedPropertyValue(dish.type, 'type');
-    const dishTypeEN = translator.translatedThingType(dish.type, 'en');
+    const dishTypeEN = translatorEN.translatedPropertyValue(dish.type, 'type', undefined);
-    const dishTypeBASE = translatorWithFallback.translatedThingType(dish.type);
+    const dishTypeBASE = translatorWithFallback.translatedPropertyValue(dish.type, 'type');
     expect(dishTypeDE).to.deep.equal(SCDishMeta.getInstance().fieldValueTranslations.de.type);
     expect(dishTypeEN).to.deep.equal(SCDishMeta.getInstance().fieldValueTranslations.en.type);
     expect(dishTypeBASE).to.deep.equal(SCDishMeta.getInstance().fieldValueTranslations.en.type);
   }
 
+  @test
+  public retrieveTranslatedPropertyValueNested() {
+    const dishTypeDE = translator.translatedPropertyValue(dish.type, 'categories', 'main dish');
+    const dishTypeEN = translatorEN.translatedPropertyValue(dish.type, 'categories', 'main dish');
+    const dishTypeBASE = translatorWithFallback.translatedPropertyValue(dish.type, 'categories', 'main dish');
+    expect(dishTypeDE).to.deep.equal(SCDishMeta.getInstance<SCDishMeta>().fieldValueTranslations.de.categories['main dish']);
+    expect(dishTypeEN).to.deep.equal(dish.categories[0]);
+    expect(dishTypeBASE).to.deep.equal(dish.categories[0]);
+  }
+
   @test
   public thingWithoutMetaClass() {
     const dishCopy = clone(dish);