v0.23.0 (#155)

* v0.23.0

* update changelog

CHANGELOG.md

@@ -3,6 +3,15 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [0.23.0](https://github.com/expo/entity/compare/v0.22.0...v0.23.0) (2022-02-09)
+
+### Breaking changes
+
+* Move data transforming responsibilities to the CacheAdapter instead of the ReadThroughEntityCache. Affects any classes extending the EntityCacheAdapter and relying on the transformation behavior of the ReadThroughEntityCache. ([#153](https://github.com/expo/entity/pull/153))
+
+
+
+
 # [0.22.0](https://github.com/expo/entity/compare/v0.21.0...v0.22.0) (2022-02-04)
 
 

lerna.json

@@ -4,5 +4,5 @@
   ],
   "npmClient": "yarn",
   "useWorkspaces": true,
-  "version": "0.22.0"
+  "version": "0.23.0"
 }

packages/entity-cache-adapter-redis/CHANGELOG.md

@@ -3,6 +3,15 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [0.23.0](https://github.com/expo/entity/compare/v0.22.0...v0.23.0) (2022-02-09)
+
+### Chores
+
+* Move data transforming responsibilities to the CacheAdapter instead of the ReadThroughEntityCache. ([#153](https://github.com/expo/entity/pull/153))
+
+
+
+
 # [0.22.0](https://github.com/expo/entity/compare/v0.21.0...v0.22.0) (2022-02-04)
 
 **Note:** Version bump only for package @expo/entity-cache-adapter-redis

packages/entity-cache-adapter-redis/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@expo/entity-cache-adapter-redis",
-  "version": "0.22.0",
+  "version": "0.23.0",
   "description": "Redis cache adapter for @expo/entity",
   "files": [
     "build",
@@ -33,6 +33,6 @@
     "ioredis": "^4.27.3"
   },
   "devDependencies": {
-    "@expo/entity": "^0.22.0"
+    "@expo/entity": "^0.23.0"
   }
 }

packages/entity-cache-adapter-redis/src/GenericRedisCacher.ts

@@ -1,6 +1,13 @@
-import { CacheLoadResult, CacheStatus } from '@expo/entity';
+import {
+  CacheLoadResult,
+  CacheStatus,
+  EntityConfiguration,
+  transformCacheObjectToFields,
+  transformFieldsToCacheObject,
+} from '@expo/entity';
 import { Redis } from 'ioredis';
 
+import { redisTransformerMap } from './RedisCommon';
 import wrapNativeRedisCallAsync from './errors/wrapNativeRedisCallAsync';
 
 // Sentinel value we store in Redis to negatively cache a database miss.
@@ -26,12 +33,15 @@ export interface GenericRedisCacheContext {
   ttlSecondsNegative: number;
 }
 
-export default class GenericRedisCacher {
+export default class GenericRedisCacher<TFields> {
-  constructor(private readonly context: GenericRedisCacheContext) {}
+  constructor(
+    private readonly context: GenericRedisCacheContext,
+    private readonly entityConfiguration: EntityConfiguration<TFields>
+  ) {}
 
   public async loadManyAsync(
     keys: readonly string[]
-  ): Promise<ReadonlyMap<string, CacheLoadResult>> {
+  ): Promise<ReadonlyMap<string, CacheLoadResult<TFields>>> {
     if (keys.length === 0) {
       return new Map();
     }
@@ -40,7 +50,7 @@ export default class GenericRedisCacher {
       this.context.redisClient.mget(...keys)
     );
 
-    const results = new Map<string, CacheLoadResult>();
+    const results = new Map<string, CacheLoadResult<TFields>>();
     for (let i = 0; i < keys.length; i++) {
       const key = keys[i]!;
       const redisResult = redisResults[i];
@@ -52,7 +62,11 @@ export default class GenericRedisCacher {
       } else if (redisResult) {
         results.set(key, {
           status: CacheStatus.HIT,
-          item: JSON.parse(redisResult),
+          item: transformCacheObjectToFields(
+            this.entityConfiguration,
+            redisTransformerMap,
+            JSON.parse(redisResult)
+          ),
         });
       } else {
         results.set(key, {
@@ -63,7 +77,7 @@ export default class GenericRedisCacher {
     return results;
   }
 
-  public async cacheManyAsync(objectMap: ReadonlyMap<string, object>): Promise<void> {
+  public async cacheManyAsync(objectMap: ReadonlyMap<string, Readonly<TFields>>): Promise<void> {
     if (objectMap.size === 0) {
       return;
     }
@@ -72,7 +86,9 @@ export default class GenericRedisCacher {
     objectMap.forEach((object, key) => {
       redisTransaction = redisTransaction.set(
         key,
-        JSON.stringify(object),
+        JSON.stringify(
+          transformFieldsToCacheObject(this.entityConfiguration, redisTransformerMap, object)
+        ),
         'EX',
         this.context.ttlSecondsPositive
       );

packages/entity-cache-adapter-redis/src/RedisCacheAdapter.ts

@@ -1,15 +1,8 @@
-import {
+import { EntityCacheAdapter, EntityConfiguration, CacheLoadResult, mapKeys } from '@expo/entity';
-  EntityCacheAdapter,
-  EntityConfiguration,
-  CacheLoadResult,
-  FieldTransformerMap,
-  mapKeys,
-} from '@expo/entity';
 import invariant from 'invariant';
 import { Redis } from 'ioredis';
 
 import GenericRedisCacher from './GenericRedisCacher';
-import { redisTransformerMap } from './RedisCommon';
 
 export interface RedisCacheAdapterContext {
   /**
@@ -49,28 +42,27 @@ export interface RedisCacheAdapterContext {
 }
 
 export default class RedisCacheAdapter<TFields> extends EntityCacheAdapter<TFields> {
-  private readonly genericRedisCacher: GenericRedisCacher;
+  private readonly genericRedisCacher: GenericRedisCacher<TFields>;
   constructor(
     entityConfiguration: EntityConfiguration<TFields>,
     private readonly context: RedisCacheAdapterContext
   ) {
     super(entityConfiguration);
 
-    this.genericRedisCacher = new GenericRedisCacher({
+    this.genericRedisCacher = new GenericRedisCacher(
+      {
         redisClient: context.redisClient,
         ttlSecondsNegative: context.ttlSecondsNegative,
         ttlSecondsPositive: context.ttlSecondsPositive,
-    });
+      },
-  }
+      entityConfiguration
-
+    );
-  public getFieldTransformerMap(): FieldTransformerMap {
-    return redisTransformerMap;
   }
 
   public async loadManyAsync<N extends keyof TFields>(
     fieldName: N,
     fieldValues: readonly NonNullable<TFields[N]>[]
-  ): Promise<ReadonlyMap<NonNullable<TFields[N]>, CacheLoadResult>> {
+  ): Promise<ReadonlyMap<NonNullable<TFields[N]>, CacheLoadResult<TFields>>> {
     const redisCacheKeyToFieldValueMapping = new Map(
       fieldValues.map((fieldValue) => [this.makeCacheKey(fieldName, fieldValue), fieldValue])
     );
@@ -91,7 +83,7 @@ export default class RedisCacheAdapter<TFields> extends EntityCacheAdapter<TFiel
 
   public async cacheManyAsync<N extends keyof TFields>(
     fieldName: N,
-    objectMap: ReadonlyMap<NonNullable<TFields[N]>, object>
+    objectMap: ReadonlyMap<NonNullable<TFields[N]>, Readonly<TFields>>
   ): Promise<void> {
     await this.genericRedisCacher.cacheManyAsync(
       mapKeys(objectMap, (fieldValue) => this.makeCacheKey(fieldName, fieldValue))

packages/entity-cache-adapter-redis/src/__integration-tests__/GenericRedisCacher-integration-test.ts

@@ -0,0 +1,125 @@
+import { CacheStatus, ViewerContext } from '@expo/entity';
+import Redis from 'ioredis';
+import { URL } from 'url';
+
+import GenericRedisCacher from '../GenericRedisCacher';
+import { RedisCacheAdapterContext } from '../RedisCacheAdapter';
+import RedisTestEntity, {
+  redisTestEntityConfiguration,
+  RedisTestEntityFields,
+} from '../testfixtures/RedisTestEntity';
+import { createRedisIntegrationTestEntityCompanionProvider } from '../testfixtures/createRedisIntegrationTestEntityCompanionProvider';
+
+class TestViewerContext extends ViewerContext {}
+
+describe(GenericRedisCacher, () => {
+  let redisCacheAdapterContext: RedisCacheAdapterContext;
+
+  beforeAll(() => {
+    redisCacheAdapterContext = {
+      redisClient: new Redis(new URL(process.env['REDIS_URL']!).toString()),
+      makeKeyFn(...parts: string[]): string {
+        const delimiter = ':';
+        const escapedParts = parts.map((part) =>
+          part.replace('\\', '\\\\').replace(delimiter, `\\${delimiter}`)
+        );
+        return escapedParts.join(delimiter);
+      },
+      cacheKeyPrefix: 'test-',
+      cacheKeyVersion: 1,
+      ttlSecondsPositive: 86400, // 1 day
+      ttlSecondsNegative: 600, // 10 minutes
+    };
+  });
+
+  beforeEach(async () => {
+    await redisCacheAdapterContext.redisClient.flushdb();
+  });
+  afterAll(async () => {
+    redisCacheAdapterContext.redisClient.disconnect();
+  });
+
+  it('has correct caching and loading behavior', async () => {
+    const viewerContext = new TestViewerContext(
+      createRedisIntegrationTestEntityCompanionProvider(redisCacheAdapterContext)
+    );
+    const genericRedisCacher = new GenericRedisCacher(
+      {
+        redisClient: redisCacheAdapterContext.redisClient,
+        ttlSecondsNegative: redisCacheAdapterContext.ttlSecondsNegative,
+        ttlSecondsPositive: redisCacheAdapterContext.ttlSecondsPositive,
+      },
+      redisTestEntityConfiguration
+    );
+    const date = new Date();
+    const entity1Created = await RedisTestEntity.creator(viewerContext)
+      .setField('name', 'blah')
+      .setField('dateField', date)
+      .enforceCreateAsync();
+    const testKey = `test-id-key-${entity1Created.getID()}`;
+    const objectMap = new Map<string, Readonly<RedisTestEntityFields>>([
+      [testKey, entity1Created.getAllFields()],
+    ]);
+    await genericRedisCacher.cacheManyAsync(objectMap);
+
+    const cachedJSON = await redisCacheAdapterContext.redisClient.get(testKey);
+    const cachedValue = JSON.parse(cachedJSON!);
+    expect(cachedValue).toMatchObject({
+      id: entity1Created.getID(),
+      dateField: date.toISOString(),
+    });
+
+    const loadedObjectMap = await genericRedisCacher.loadManyAsync([testKey]);
+    const cacheLoadResult = loadedObjectMap.get(testKey)!;
+    expect(cacheLoadResult).toMatchObject({
+      status: CacheStatus.HIT,
+      item: entity1Created.getAllFields(),
+    });
+    expect(loadedObjectMap.size).toBe(1);
+  });
+  it('has correct negative caching behaviour', async () => {
+    const genericRedisCacher = new GenericRedisCacher(
+      {
+        redisClient: redisCacheAdapterContext.redisClient,
+        ttlSecondsNegative: redisCacheAdapterContext.ttlSecondsNegative,
+        ttlSecondsPositive: redisCacheAdapterContext.ttlSecondsPositive,
+      },
+      redisTestEntityConfiguration
+    );
+
+    const testKey = `test-id-key-non-existent-id`;
+    await genericRedisCacher.cacheDBMissesAsync([testKey]);
+    const loadedObjectMap = await genericRedisCacher.loadManyAsync([testKey]);
+    const cacheLoadResult = loadedObjectMap.get(testKey)!;
+    expect(cacheLoadResult.status).toBe(CacheStatus.NEGATIVE);
+  });
+  it('has correct invalidation behaviour', async () => {
+    const viewerContext = new TestViewerContext(
+      createRedisIntegrationTestEntityCompanionProvider(redisCacheAdapterContext)
+    );
+    const genericRedisCacher = new GenericRedisCacher(
+      {
+        redisClient: redisCacheAdapterContext.redisClient,
+        ttlSecondsNegative: redisCacheAdapterContext.ttlSecondsNegative,
+        ttlSecondsPositive: redisCacheAdapterContext.ttlSecondsPositive,
+      },
+      redisTestEntityConfiguration
+    );
+    const date = new Date();
+    const entity1Created = await RedisTestEntity.creator(viewerContext)
+      .setField('name', 'blah')
+      .setField('dateField', date)
+      .enforceCreateAsync();
+    const testKey = `test-id-key-${entity1Created.getID()}`;
+    const objectMap = new Map<string, Readonly<RedisTestEntityFields>>([
+      [testKey, entity1Created.getAllFields()],
+    ]);
+    await genericRedisCacher.cacheManyAsync(objectMap);
+
+    await genericRedisCacher.invalidateManyAsync([testKey]);
+
+    const loadedObjectMap = await genericRedisCacher.loadManyAsync([testKey]);
+    const cacheLoadResult = loadedObjectMap.get(testKey)!;
+    expect(cacheLoadResult.status).toBe(CacheStatus.MISS);
+  });
+});

packages/entity-database-adapter-knex/CHANGELOG.md

@@ -3,6 +3,14 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [0.23.0](https://github.com/expo/entity/compare/v0.22.0...v0.23.0) (2022-02-09)
+
+**Note:** Version bump only for package @expo/entity-database-adapter-knex
+
+
+
+
+
 # [0.22.0](https://github.com/expo/entity/compare/v0.21.0...v0.22.0) (2022-02-04)
 
 

packages/entity-database-adapter-knex/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@expo/entity-database-adapter-knex",
-  "version": "0.22.0",
+  "version": "0.23.0",
   "description": "Knex database adapter for @expo/entity",
   "files": [
     "build",
@@ -33,7 +33,7 @@
     "knex": "^1.0.2"
   },
   "devDependencies": {
-    "@expo/entity": "^0.22.0",
+    "@expo/entity": "^0.23.0",
     "pg": "^8.7.1"
   }
 }

packages/entity-example/CHANGELOG.md

@@ -3,6 +3,14 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [0.23.0](https://github.com/expo/entity/compare/v0.22.0...v0.23.0) (2022-02-09)
+
+**Note:** Version bump only for package @expo/entity-example
+
+
+
+
+
 # [0.22.0](https://github.com/expo/entity/compare/v0.21.0...v0.22.0) (2022-02-04)
 
 **Note:** Version bump only for package @expo/entity-example

packages/entity-example/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@expo/entity-example",
   "private": true,
-  "version": "0.22.0",
+  "version": "0.23.0",
   "description": "An example integration of the @expo/entity framework",
   "scripts": {
     "tsc": "tsc",
@@ -23,7 +23,7 @@
   "author": "Expo",
   "license": "MIT",
   "dependencies": {
-    "@expo/entity": "^0.22.0",
+    "@expo/entity": "^0.23.0",
     "apollo-server-koa": "^2.16.1",
     "graphql": "^15.3.0",
     "koa": "^2.13.0",

packages/entity-full-integration-tests/CHANGELOG.md

@@ -3,6 +3,14 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [0.23.0](https://github.com/expo/entity/compare/v0.22.0...v0.23.0) (2022-02-09)
+
+**Note:** Version bump only for package @expo/entity-full-integration-tests
+
+
+
+
+
 # [0.22.0](https://github.com/expo/entity/compare/v0.21.0...v0.22.0) (2022-02-04)
 
 **Note:** Version bump only for package @expo/entity-full-integration-tests

packages/entity-full-integration-tests/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@expo/entity-full-integration-tests",
   "private": true,
-  "version": "0.22.0",
+  "version": "0.23.0",
   "description": "Full redis and knex integration tests for the entity framework",
   "scripts": {
     "tsc": "tsc",
@@ -27,8 +27,8 @@
     "@expo/entity-database-adapter-knex": "*"
   },
   "devDependencies": {
-    "@expo/entity": "^0.22.0",
+    "@expo/entity": "^0.23.0",
-    "@expo/entity-cache-adapter-redis": "^0.22.0",
+    "@expo/entity-cache-adapter-redis": "^0.23.0",
-    "@expo/entity-database-adapter-knex": "^0.22.0"
+    "@expo/entity-database-adapter-knex": "^0.23.0"
   }
 }

packages/entity-ip-address-field/CHANGELOG.md

@@ -3,6 +3,14 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [0.23.0](https://github.com/expo/entity/compare/v0.22.0...v0.23.0) (2022-02-09)
+
+**Note:** Version bump only for package @expo/entity-ip-address-field
+
+
+
+
+
 # [0.22.0](https://github.com/expo/entity/compare/v0.21.0...v0.22.0) (2022-02-04)
 
 **Note:** Version bump only for package @expo/entity-ip-address-field

packages/entity-ip-address-field/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@expo/entity-ip-address-field",
-  "version": "0.22.0",
+  "version": "0.23.0",
   "description": "IP address EntityField definitions for @expo/entity",
   "files": [
     "build",
@@ -28,7 +28,7 @@
     "ip-address": "^8.1.0"
   },
   "devDependencies": {
-    "@expo/entity": "^0.22.0",
+    "@expo/entity": "^0.23.0",
     "@types/jsbn": "^1.2.29"
   },
   "peerDependencies": {

packages/entity-secondary-cache-redis/CHANGELOG.md

@@ -3,6 +3,15 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [0.23.0](https://github.com/expo/entity/compare/v0.22.0...v0.23.0) (2022-02-09)
+
+### Chores
+
+* Move data transforming responsibilities to the CacheAdapter instead of the RedisSecondaryEntityCache. ([#153](https://github.com/expo/entity/pull/153))
+
+
+
+
 # [0.22.0](https://github.com/expo/entity/compare/v0.21.0...v0.22.0) (2022-02-04)
 
 **Note:** Version bump only for package @expo/entity-secondary-cache-redis

packages/entity-secondary-cache-redis/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@expo/entity-secondary-cache-redis",
-  "version": "0.22.0",
+  "version": "0.23.0",
   "description": "Redis secondary cache for @expo/entity",
   "files": [
     "build",
@@ -34,8 +34,8 @@
     "ioredis": "^4.17.3"
   },
   "devDependencies": {
-    "@expo/entity": "^0.22.0",
+    "@expo/entity": "^0.23.0",
-    "@expo/entity-cache-adapter-redis": "^0.22.0",
+    "@expo/entity-cache-adapter-redis": "^0.23.0",
     "nullthrows": "^1.1.1"
   }
 }

packages/entity-secondary-cache-redis/src/RedisSecondaryEntityCache.ts

@@ -3,15 +3,9 @@ import {
   EntityConfiguration,
   filterMap,
   ISecondaryEntityCache,
-  transformCacheObjectToFields,
-  transformFieldsToCacheObject,
   zipToMap,
 } from '@expo/entity';
-import {
+import { GenericRedisCacheContext, GenericRedisCacher } from '@expo/entity-cache-adapter-redis';
-  GenericRedisCacheContext,
-  GenericRedisCacher,
-  redisTransformerMap,
-} from '@expo/entity-cache-adapter-redis';
 import invariant from 'invariant';
 
 /**
@@ -22,14 +16,14 @@ import invariant from 'invariant';
 export default class RedisSecondaryEntityCache<TFields, TLoadParams>
   implements ISecondaryEntityCache<TFields, TLoadParams>
 {
-  private readonly genericRedisCacher: GenericRedisCacher;
+  private readonly genericRedisCacher: GenericRedisCacher<TFields>;
 
   constructor(
-    private readonly entityConfiguration: EntityConfiguration<TFields>,
+    entityConfiguration: EntityConfiguration<TFields>,
     genericRedisCacheContext: GenericRedisCacheContext,
     private readonly constructRedisKey: (params: Readonly<TLoadParams>) => string
   ) {
-    this.genericRedisCacher = new GenericRedisCacher(genericRedisCacheContext);
+    this.genericRedisCacher = new GenericRedisCacher(genericRedisCacheContext, entityConfiguration);
   }
 
   /**
@@ -74,14 +68,7 @@ export default class RedisSecondaryEntityCache<TFields, TLoadParams>
       if (cacheLoadResult.status === CacheStatus.HIT) {
         const loadParams = redisKeyToLoadParamsMap.get(redisKey);
         invariant(loadParams !== undefined, 'load params should be in redis key map');
-        results.set(
+        results.set(loadParams, cacheLoadResult.item);
-          loadParams,
-          transformCacheObjectToFields(
-            this.entityConfiguration,
-            redisTransformerMap,
-            cacheLoadResult.item
-          )
-        );
       }
     });
 
@@ -103,13 +90,10 @@ export default class RedisSecondaryEntityCache<TFields, TLoadParams>
         results.set(fetchMiss, null);
       }
 
-      const objectsToCache: Map<string, object> = new Map();
+      const objectsToCache: Map<string, Readonly<TFields>> = new Map();
       for (const [loadParams, object] of fetchResults.entries()) {
         if (object) {
-          objectsToCache.set(
+          objectsToCache.set(this.constructRedisKey(loadParams), object);
-            this.constructRedisKey(loadParams),
-            transformFieldsToCacheObject(this.entityConfiguration, redisTransformerMap, object)
-          );
           results.set(loadParams, object);
         }
       }

packages/entity/CHANGELOG.md

@@ -3,6 +3,15 @@
 All notable changes to this project will be documented in this file.
 See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
 
+# [0.23.0](https://github.com/expo/entity/compare/v0.22.0...v0.23.0) (2022-02-09)
+
+### Breaking changes
+
+* Move data transforming responsibilities to the CacheAdapter instead of the ReadThroughEntityCache. Affects any classes extending the EntityCacheAdapter and relying on the transformation behavior of the ReadThroughEntityCache. ([#153](https://github.com/expo/entity/pull/153))
+
+
+
+
 # [0.22.0](https://github.com/expo/entity/compare/v0.21.0...v0.22.0) (2022-02-04)
 
 **Note:** Version bump only for package @expo/entity

packages/entity/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@expo/entity",
-  "version": "0.22.0",
+  "version": "0.23.0",
   "description": "A privacy-first data model",
   "files": [
     "build",

packages/entity/src/EntityCacheAdapter.ts

@@ -1,5 +1,4 @@
 import EntityConfiguration from './EntityConfiguration';
-import { FieldTransformerMap } from './internal/EntityFieldTransformationUtils';
 import { CacheLoadResult } from './internal/ReadThroughEntityCache';
 
 /**
@@ -9,13 +8,6 @@ import { CacheLoadResult } from './internal/ReadThroughEntityCache';
 export default abstract class EntityCacheAdapter<TFields> {
   constructor(protected readonly entityConfiguration: EntityConfiguration<TFields>) {}
 
-  /**
-   * Transformer definitions for field types. Used to modify values as they are read from or written to
-   * the cache. Override in concrete subclasses to change transformation behavior.
-   * If a field type is not present in the map, then fields of that type will not be transformed.
-   */
-  public abstract getFieldTransformerMap(): FieldTransformerMap;
-
   /**
    * Load many objects from cache.
    * @param fieldName - object field being queried
@@ -25,7 +17,7 @@ export default abstract class EntityCacheAdapter<TFields> {
   public abstract loadManyAsync<N extends keyof TFields>(
     fieldName: N,
     fieldValues: readonly NonNullable<TFields[N]>[]
-  ): Promise<ReadonlyMap<NonNullable<TFields[N]>, CacheLoadResult>>;
+  ): Promise<ReadonlyMap<NonNullable<TFields[N]>, CacheLoadResult<TFields>>>;
 
   /**
    * Cache many objects fetched from the DB.
@@ -34,7 +26,7 @@ export default abstract class EntityCacheAdapter<TFields> {
    */
   public abstract cacheManyAsync<N extends keyof TFields>(
     fieldName: N,
-    objectMap: ReadonlyMap<NonNullable<TFields[N]>, object>
+    objectMap: ReadonlyMap<NonNullable<TFields[N]>, Readonly<TFields>>
   ): Promise<void>;
 
   /**

packages/entity/src/internal/ReadThroughEntityCache.ts

@@ -3,11 +3,6 @@ import invariant from 'invariant';
 import EntityCacheAdapter from '../EntityCacheAdapter';
 import EntityConfiguration from '../EntityConfiguration';
 import { filterMap } from '../utils/collections/maps';
-import {
-  FieldTransformerMap,
-  transformCacheObjectToFields,
-  transformFieldsToCacheObject,
-} from './EntityFieldTransformationUtils';
 
 export enum CacheStatus {
   HIT,
@@ -15,10 +10,10 @@ export enum CacheStatus {
   NEGATIVE,
 }
 
-export type CacheLoadResult =
+export type CacheLoadResult<TFields> =
   | {
       status: CacheStatus.HIT;
-      item: Readonly<object>;
+      item: Readonly<TFields>;
     }
   | {
       status: CacheStatus.MISS;
@@ -32,14 +27,10 @@ export type CacheLoadResult =
  * {@link EntityCacheAdapter} within the {@link EntityDataManager}.
  */
 export default class ReadThroughEntityCache<TFields> {
-  private readonly fieldTransformerMap: FieldTransformerMap;
-
   constructor(
     private readonly entityConfiguration: EntityConfiguration<TFields>,
     private readonly entityCacheAdapter: EntityCacheAdapter<TFields>
-  ) {
+  ) {}
-    this.fieldTransformerMap = entityCacheAdapter.getFieldTransformerMap();
-  }
 
   private isFieldCacheable<N extends keyof TFields>(fieldName: N): boolean {
     return this.entityConfiguration.cacheableKeys.has(fieldName);
@@ -91,13 +82,7 @@ export default class ReadThroughEntityCache<TFields> {
     const results: Map<NonNullable<TFields[N]>, readonly Readonly<TFields>[]> = new Map();
     cacheLoadResults.forEach((cacheLoadResult, fieldValue) => {
       if (cacheLoadResult.status === CacheStatus.HIT) {
-        results.set(fieldValue, [
+        results.set(fieldValue, [cacheLoadResult.item]);
-          transformCacheObjectToFields(
-            this.entityConfiguration,
-            this.fieldTransformerMap,
-            cacheLoadResult.item
-          ),
-        ]);
       }
     });
 
@@ -110,7 +95,7 @@ export default class ReadThroughEntityCache<TFields> {
         return !objectsFromFulfillerForFv || objectsFromFulfillerForFv.length === 0;
       });
 
-      const objectsToCache: Map<NonNullable<TFields[N]>, object> = new Map();
+      const objectsToCache: Map<NonNullable<TFields[N]>, Readonly<TFields>> = new Map();
       for (const [fieldValue, objects] of dbFetchResults.entries()) {
         if (objects.length > 1) {
           // multiple objects received for what was supposed to be a unique query, don't add to return map nor cache
@@ -123,14 +108,7 @@ export default class ReadThroughEntityCache<TFields> {
         }
         const uniqueObject = objects[0];
         if (uniqueObject) {
-          objectsToCache.set(
+          objectsToCache.set(fieldValue, uniqueObject);
-            fieldValue,
-            transformFieldsToCacheObject(
-              this.entityConfiguration,
-              this.fieldTransformerMap,
-              uniqueObject
-            )
-          );
           results.set(fieldValue, [uniqueObject]);
         }
       }

packages/entity/src/internal/__tests__/ReadThroughEntityCache-test.ts

@@ -40,7 +40,6 @@ describe(ReadThroughEntityCache, () => {
   describe('readManyThroughAsync', () => {
     it('fetches from DB upon cache miss and caches the result', async () => {
       const cacheAdapterMock = mock<EntityCacheAdapter<BlahFields>>();
-      when(cacheAdapterMock.getFieldTransformerMap()).thenReturn(new Map());
       const cacheAdapter = instance(cacheAdapterMock);
       const entityCache = new ReadThroughEntityCache(makeEntityConfiguration(true), cacheAdapter);
       const fetcher = createIdFetcher(['wat', 'who']);
@@ -77,7 +76,6 @@ describe(ReadThroughEntityCache, () => {
 
     it('does not fetch from the DB or cache results when all cache fetches are hits', async () => {
       const cacheAdapterMock = mock<EntityCacheAdapter<BlahFields>>();
-      when(cacheAdapterMock.getFieldTransformerMap()).thenReturn(new Map());
       const cacheAdapter = instance(cacheAdapterMock);
       const entityCache = new ReadThroughEntityCache(makeEntityConfiguration(true), cacheAdapter);
       const fetcher = createIdFetcher(['wat', 'who']);
@@ -114,7 +112,6 @@ describe(ReadThroughEntityCache, () => {
 
     it('negatively caches db misses', async () => {
       const cacheAdapterMock = mock<EntityCacheAdapter<BlahFields>>();
-      when(cacheAdapterMock.getFieldTransformerMap()).thenReturn(new Map());
       const cacheAdapter = instance(cacheAdapterMock);
       const entityCache = new ReadThroughEntityCache(makeEntityConfiguration(true), cacheAdapter);
 
@@ -135,7 +132,6 @@ describe(ReadThroughEntityCache, () => {
 
     it('does not return or fetch negatively cached results from DB', async () => {
       const cacheAdapterMock = mock<EntityCacheAdapter<BlahFields>>();
-      when(cacheAdapterMock.getFieldTransformerMap()).thenReturn(new Map());
       const cacheAdapter = instance(cacheAdapterMock);
       const entityCache = new ReadThroughEntityCache(makeEntityConfiguration(true), cacheAdapter);
       const fetcher = createIdFetcher([]);
@@ -153,7 +149,6 @@ describe(ReadThroughEntityCache, () => {
 
     it('does a mix and match of hit, miss, and negative', async () => {
       const cacheAdapterMock = mock<EntityCacheAdapter<BlahFields>>();
-      when(cacheAdapterMock.getFieldTransformerMap()).thenReturn(new Map());
       const cacheAdapter = instance(cacheAdapterMock);
       const entityCache = new ReadThroughEntityCache(makeEntityConfiguration(true), cacheAdapter);
       const fetcher = createIdFetcher(['wat', 'who', 'why']);
@@ -189,7 +184,6 @@ describe(ReadThroughEntityCache, () => {
 
     it('does not call into cache for field that is not cacheable', async () => {
       const cacheAdapterMock = mock<EntityCacheAdapter<BlahFields>>();
-      when(cacheAdapterMock.getFieldTransformerMap()).thenReturn(new Map());
       const cacheAdapter = instance(cacheAdapterMock);
       const entityCache = new ReadThroughEntityCache(makeEntityConfiguration(false), cacheAdapter);
       const fetcher = createIdFetcher(['wat']);
@@ -197,44 +191,6 @@ describe(ReadThroughEntityCache, () => {
       verify(cacheAdapterMock.loadManyAsync('id', anything())).never();
       expect(result).toEqual(new Map([['wat', [{ id: 'wat' }]]]));
     });
-
-    it('transforms fields for cache storage', async () => {
-      const cacheAdapterMock = mock<EntityCacheAdapter<BlahFields>>();
-      when(cacheAdapterMock.getFieldTransformerMap()).thenReturn(
-        new Map([
-          [
-            UUIDField.name,
-            {
-              read: (val) => val.split('-')[0],
-              write: (val) => `${val}-in-cache`,
-            },
-          ],
-        ])
-      );
-      const cacheAdapter = instance(cacheAdapterMock);
-      const entityCache = new ReadThroughEntityCache(makeEntityConfiguration(true), cacheAdapter);
-      const fetcher = createIdFetcher(['wat', 'who']);
-
-      when(cacheAdapterMock.loadManyAsync('id', deepEqual(['wat', 'who']))).thenResolve(
-        new Map([
-          ['wat', { status: CacheStatus.MISS }],
-          ['who', { status: CacheStatus.HIT, item: { id: 'who-in-cache' } }],
-        ])
-      );
-
-      const result = await entityCache.readManyThroughAsync('id', ['wat', 'who'], fetcher);
-
-      verify(cacheAdapterMock.loadManyAsync('id', deepEqual(['wat', 'who']))).once();
-      verify(
-        cacheAdapterMock.cacheManyAsync('id', deepEqual(new Map([['wat', { id: 'wat-in-cache' }]])))
-      ).once();
-      expect(result).toEqual(
-        new Map([
-          ['wat', [{ id: 'wat' }]],
-          ['who', [{ id: 'who' }]],
-        ])
-      );
-    });
   });
 
   describe('invalidateManyAsync', () => {

packages/entity/src/utils/testing/StubCacheAdapter.ts

@@ -3,7 +3,6 @@ import invariant from 'invariant';
 import EntityCacheAdapter from '../../EntityCacheAdapter';
 import EntityConfiguration from '../../EntityConfiguration';
 import IEntityCacheAdapterProvider from '../../IEntityCacheAdapterProvider';
-import { FieldTransformerMap } from '../../internal/EntityFieldTransformationUtils';
 import { CacheStatus, CacheLoadResult } from '../../internal/ReadThroughEntityCache';
 
 export class NoCacheStubCacheAdapterProvider implements IEntityCacheAdapterProvider {
@@ -15,15 +14,11 @@ export class NoCacheStubCacheAdapterProvider implements IEntityCacheAdapterProvi
 }
 
 export class NoCacheStubCacheAdapter<TFields> extends EntityCacheAdapter<TFields> {
-  public getFieldTransformerMap(): FieldTransformerMap {
-    return new Map();
-  }
-
   public async loadManyAsync<N extends keyof TFields>(
     _fieldName: N,
     fieldValues: readonly NonNullable<TFields[N]>[]
-  ): Promise<ReadonlyMap<NonNullable<TFields[N]>, CacheLoadResult>> {
+  ): Promise<ReadonlyMap<NonNullable<TFields[N]>, CacheLoadResult<TFields>>> {
-    return fieldValues.reduce((acc: Map<NonNullable<TFields[N]>, CacheLoadResult>, v) => {
+    return fieldValues.reduce((acc: Map<NonNullable<TFields[N]>, CacheLoadResult<TFields>>, v) => {
       acc.set(v, {
         status: CacheStatus.MISS,
       });
@@ -33,7 +28,7 @@ export class NoCacheStubCacheAdapter<TFields> extends EntityCacheAdapter<TFields
 
   public async cacheManyAsync<N extends keyof TFields>(
     _fieldName: N,
-    _objectMap: ReadonlyMap<NonNullable<TFields[N]>, object>
+    _objectMap: ReadonlyMap<NonNullable<TFields[N]>, Readonly<TFields>>
   ): Promise<void> {}
 
   public async cacheDBMissesAsync<N extends keyof TFields>(
@@ -53,27 +48,26 @@ export class InMemoryFullCacheStubCacheAdapterProvider implements IEntityCacheAd
   getCacheAdapter<TFields>(
     entityConfiguration: EntityConfiguration<TFields>
   ): EntityCacheAdapter<TFields> {
-    return new InMemoryFullCacheStubCacheAdapter(entityConfiguration, this.cache);
+    return new InMemoryFullCacheStubCacheAdapter(
+      entityConfiguration,
+      this.cache as Map<string, Readonly<TFields>>
+    );
   }
 }
 
 export class InMemoryFullCacheStubCacheAdapter<TFields> extends EntityCacheAdapter<TFields> {
   constructor(
     entityConfiguration: EntityConfiguration<TFields>,
-    readonly cache: Map<string, Readonly<object>>
+    readonly cache: Map<string, Readonly<TFields>>
   ) {
     super(entityConfiguration);
   }
 
-  public getFieldTransformerMap(): FieldTransformerMap {
-    return new Map();
-  }
-
   public async loadManyAsync<N extends keyof TFields>(
     fieldName: N,
     fieldValues: readonly NonNullable<TFields[N]>[]
-  ): Promise<ReadonlyMap<NonNullable<TFields[N]>, CacheLoadResult>> {
+  ): Promise<ReadonlyMap<NonNullable<TFields[N]>, CacheLoadResult<TFields>>> {
-    const results = new Map<NonNullable<TFields[N]>, CacheLoadResult>();
+    const results = new Map<NonNullable<TFields[N]>, CacheLoadResult<TFields>>();
     fieldValues.forEach((fieldValue) => {
       const cacheKey = this.createCacheKey(fieldName, fieldValue);
       if (!this.cache.has(cacheKey)) {
@@ -94,7 +88,7 @@ export class InMemoryFullCacheStubCacheAdapter<TFields> extends EntityCacheAdapt
 
   public async cacheManyAsync<N extends keyof TFields>(
     fieldName: N,
-    objectMap: ReadonlyMap<NonNullable<TFields[N]>, object>
+    objectMap: ReadonlyMap<NonNullable<TFields[N]>, Readonly<TFields>>
   ): Promise<void> {
     objectMap.forEach((obj, fieldValue) => {
       const cacheKey = this.createCacheKey(fieldName, fieldValue);