Update finding Record section in ember-data guides to teach request service

guides/release/models/finding-records.md

@@ -2,34 +2,36 @@ The EmberData store provides an interface for retrieving records of a single typ
 
 ### Retrieving a Single Record
 
-Use [`store.findRecord()`](https://api.emberjs.com/ember-data/release/classes/Store/methods/findRecord?anchor=findRecord) to retrieve a record by its type and ID.
-This will return a promise that fulfills with the requested record:
+Use [`findRecord()`](https://api.emberjs.com/ember-data/5.3/functions/@ember-data%2Fjson-api%2Frequest/findRecord) to retrieve a record by its type and ID.
+This will return a single `record` or a `array` depends upon the response from server:
 
 ```javascript
-// GET /blog-posts/1
-this.store.findRecord('blog-post', 1)  // => GET /blog-posts/1
-  .then(function(blogPost) {
-      // Do something with `blogPost`
-  });
+// GET /blog-post/1
+import { service } from '@ember/service';
+import { findRecord } from '@ember-data/json-api/request';
+
+// somewhere in the app
+const result = await store.request(findRecord('blog-post', '1'));
+const blogPost = result.content.data;
 ```
 
 Use [`store.peekRecord()`](https://api.emberjs.com/ember-data/release/classes/Store/methods/peekRecord?anchor=peekRecord) to retrieve a record by its type and ID, without making a network request.
 This will return the record only if it is already present in the store:
 
 ```javascript
-let blogPost = this.store.peekRecord('blog-post', 1); // => no network request
+let blogPost = this.store.peekRecord('blog-post', '1'); // => no network request
 ```
 
 ### Retrieving Multiple Records
 
-Use [`store.findAll()`](https://api.emberjs.com/ember-data/release/classes/Store/methods/findAll?anchor=findAll) to retrieve all of the records for a given type:
+Use [`query()`](https://api.emberjs.com/ember-data/5.3/functions/@ember-data%2Fjson-api%2Frequest/query) to retrieve all of the records for a given type:
 
 ```javascript
 // GET /blog-posts
-this.store.findAll('blog-post') // => GET /blog-posts
-  .then(function(blogPosts) {
-    // Do something with `blogPosts`
-  });
+import { query } from '@ember-data/json-api/request';
+
+const result = await store.request(query('blog-post'));
+const blogPosts = result.content.data;
 ```
 
 Use [`store.peekAll()`](https://api.emberjs.com/ember-data/release/classes/Store/methods/peekAll?anchor=peekAll) to retrieve all of the records for a given type that are already loaded into the store, without making a network request:
@@ -38,7 +40,7 @@ Use [`store.peekAll()`](https://api.emberjs.com/ember-data/release/classes/Store
 let blogPosts = this.store.peekAll('blog-post'); // => no network request
 ```
 
-`store.findAll()` returns a `PromiseArray` that fulfills to a `RecordArray` and `store.peekAll` directly returns a `RecordArray`.
+`findRecord()` returns a `response` which has the record and `store.peekAll` directly returns a `RecordArray`.
 
 It's important to note that `RecordArray` is not a JavaScript array, it's an object that implements [`MutableArray`](https://api.emberjs.com/ember/release/classes/MutableArray).
 This is important because, for example, if you want to retrieve records by index,
@@ -47,28 +49,29 @@ the `[]` notation will not work--you'll have to use `objectAt(index)` instead.
 ### Querying for Multiple Records
 
 EmberData provides the ability to query for records that meet certain criteria.
-Calling [`store.query()`](https://api.emberjs.com/ember-data/release/classes/Store/methods/query?anchor=query) will make a `GET` request with the passed object serialized as query params.
-This method returns a `PromiseArray` in the same way as `findAll`.
+Calling [`query()`](https://api.emberjs.com/ember-data/5.3/functions/@ember-data%2Fjson-api%2Frequest/query) will make a `GET` request with the passed object serialized as query params.
+This method returns a respone from the server in the same way as `findRecord`.
 
 For example, we could search for all `person` models who have the name of
 `Peter`:
 
 ```javascript
 // GET to /persons?filter[name]=Peter
-this.store.query('person', {
+import { query } from '@ember-data/json-api/request';
+
+const result = await store.request(query('person', {
   filter: {
     name: 'Peter'
   }
-}).then(function(peters) {
-  // Do something with `peters`
-});
+}));
+const person = result.content.data;
 ```
 
 ### Querying for A Single Record
 
-If you are using an adapter that supports server requests capable of returning a single model object,
-EmberData provides a convenience method [`store.queryRecord()`](https://api.emberjs.com/ember-data/release/classes/Store/methods/queryRecord?anchor=queryRecord) that will return a promise that resolves with that single record.
-The request is made via a method `queryRecord()` defined by the adapter.
+If you are using an builder that supports server requests capable of returning a single model object,
+EmberData provides a convenience method [`findRecord()`](https://api.emberjs.com/ember-data/release/functions/@ember-data%2Fjson-api%2Frequest/findRecord) that will return a record.
+The request is made via a method `findRecord()` defined by the builders.
 
 For example, if your server API provides an endpoint for the currently logged in user:
 
@@ -82,43 +85,44 @@ For example, if your server API provides an endpoint for the currently logged in
 }
 ```
 
-And if the adapter for the `User` model defines a `queryRecord()` method that targets that endpoint:
-
-```javascript {data-filename=app/adapters/user.js}
-import Adapter from '@ember-data/adapter';
-import fetch from 'fetch';
-
-export default class UserAdapter extends Adapter {
-  queryRecord(store, type, query) {
-    return fetch('/api/current_user');
-  }
+And if the builders for the `User` model defines a `queryData()` method that targets that endpoint:
+
+```javascript {data-filename=app/builders/user.js}
+export function queryData() {
+    return {
+        url: `/api/current_user`,
+        method: 'GET',
+        headers: {
+            'Content-Type': 'application/json'
+        },
+    }
 }
 ```
 
-Then, calling [`store.queryRecord()`](https://api.emberjs.com/ember-data/release/classes/Store/methods/queryRecord?anchor=queryRecord) will retrieve that object from the server:
+Then, calling `queryData()` will retrieve that object from the server:
 
 ```javascript
-store.queryRecord('user', {}).then(function(user) {
-  let username = user.get('username');
-  console.log(`Currently logged in as ${username}`);
-});
+import { queryData } from './builders';
+
+const user = await requestManager.request(queryData());
+let username = user.get('username');
+
+console.log(`Currently logged in as ${username}`);
 ```
 
-As in the case of `store.query()`, a query object can also be passed to `store.queryRecord()` and is available for the adapter's `queryRecord()` to use to qualify the request.
-However the adapter must return a single model object, not an array containing one element,
+As in the case of `query()`, a query object can also be passed to `query()` and is available for the builder's `query()` to use to qualify the request.
+However the builder must return a single model object, not an array containing one element,
 otherwise EmberData will throw an exception.
 
-Note that Ember's default [JSON:API adapter](https://api.emberjs.com/ember-data/release/classes/JSONAPIAdapter) does not provide the functionality needed to support `queryRecord()` directly as it relies on REST request definitions that return result data in the form of an array.
-
-If your server API or your adapter only provides array responses but you wish to retrieve just a single record, you can alternatively use the `query()` method as follows:
+If your server API or your builder only provides array responses but you wish to retrieve just a single record, you can alternatively use the `query()` method as follows:
 
 ```javascript
 // GET to /users?filter[email][email protected]
-tom = store.query('user', {
+tom = requestManager.request(queryData('user', {
   filter: {
     email: '[email protected]'
   }
-}).then(function(users) {
+})).then(function(users) {
   return users[0]; // the first object
 });
 ```