Adding more docs for toJSON

content/ember-data/v3/toJSON.md

@@ -7,4 +7,38 @@ since: '3.12.0'
 
 Users should avoid calling [`toJSON`](https://github.com/emberjs/data/blob/1be481a4924b2b4316c1cc151a58328c88903dcd/packages/store/addon/-private/system/model/model.js#L620) on a record instance since it uses the now deprecated `-default` serializer to create a JSON representation of a model.
 
-To clear this deprecation users may call record.serialize() or implement their own toJSON instead.
+To clear this deprecation users may call record.serialize() or implement their own toJSON instead. The simplest 1:1 refactor is to import a serializer and define a `toJSON` method that returns the serialized data from the model, but users may want to consider implementing a custom "serialize" method that outputs relevant data.
+
+An example of the simple refactor is below:
+### before
+
+  `app/models/post.js`
+
+    import Model from '@ember-data/model';
+
+    export default Model.extend({});
+
+  `other app code`
+
+    const record = store.peekRecord('post');
+    // users the default serializer, will have a deprecation warning
+    const output = record.toJSON();
+
+### after
+  `app/models/post.js`
+
+    import Model from '@ember-data/model';
+    import { JSONAPISerializer } from '@ember-data/serializers';
+
+    export default Model.extend({
+      toJSON(options) {
+        let snapshot = this._internalModel.createSnapshot();
+        return JSONAPISerializer.serialize(snapshot, options);
+      }
+    });
+
+  `other app code`
+
+    const record = store.peekRecord('post');
+    // users the default serializer
+    const output = record.toJSON();