Fixed Ember Data record.toJSON() deprecation

no issue

- https://deprecations.emberjs.com/ember-data/v3.x/#toc_record-toJSON

ghost/admin/app/models/invite.js

@@ -19,11 +19,9 @@ export default Model.extend({
     ghostPaths: service(),
 
     resend() {
-        let fullInviteData = this.toJSON();
-
         let inviteData = {
-            email: fullInviteData.email,
+            email: this.email,
-            role_id: fullInviteData.role
+            role_id: this.belongsTo('role').id
         };
 
         let inviteUrl = this.get('ghostPaths.url').api('invites');

ghost/admin/app/services/notifications.js

@@ -42,7 +42,7 @@ export default Service.extend({
 
     handleNotification(message, delayed) {
         // If this is an alert message from the server, treat it as html safe
-        if (typeof message.toJSON === 'function' && message.get('status') === 'alert') {
+        if (message.constructor.modelName === 'notification' && message.get('status') === 'alert') {
             message.set('message', htmlSafe(message.get('message')));
         }
 
@@ -155,7 +155,7 @@ export default Service.extend({
     closeNotification(notification) {
         let content = this.content;
 
-        if (typeof notification.toJSON === 'function') {
+        if (notification.constructor.modelName === 'notification') {
             notification.deleteRecord();
             notification.save().finally(() => {
                 content.removeObject(notification);

ghost/admin/tests/unit/services/notifications-test.js

@@ -9,6 +9,11 @@ import {get} from '@ember/object';
 import {run} from '@ember/runloop';
 import {setupTest} from 'ember-mocha';
 
+// notifications service determines if a notification is a model instance by
+// checking `notification.constructor.modelName === 'notification'`
+const NotificationStub = EmberObject.extend();
+NotificationStub.modelName = 'notification';
+
 describe('Unit: Service: notifications', function () {
     setupTest();
 
@@ -35,9 +40,7 @@ describe('Unit: Service: notifications', function () {
 
     it('#handleNotification deals with DS.Notification notifications', function () {
         let notifications = this.owner.lookup('service:notifications');
-        let notification = EmberObject.create({message: '<h1>Test</h1>', status: 'alert'});
+        let notification = NotificationStub.create({message: '<h1>Test</h1>', status: 'alert'});
-
-        notification.toJSON = function () {};
 
         notifications.handleNotification(notification);
 
@@ -315,10 +318,9 @@ describe('Unit: Service: notifications', function () {
     });
 
     it('#closeNotification removes and deletes DS.Notification records', function () {
-        let notification = EmberObject.create({message: 'Close test', status: 'alert'});
         let notifications = this.owner.lookup('service:notifications');
+        let notification = NotificationStub.create({message: 'Close test', status: 'alert'});
 
-        notification.toJSON = function () {};
         notification.deleteRecord = function () {};
         sinon.spy(notification, 'deleteRecord');
         notification.save = function () {
@@ -392,7 +394,6 @@ describe('Unit: Service: notifications', function () {
         let notifications = this.owner.lookup('service:notifications');
         let notificationModel = EmberObject.create({message: 'model'});
 
-        notificationModel.toJSON = function () {};
         notificationModel.deleteRecord = function () {};
         sinon.spy(notificationModel, 'deleteRecord');
         notificationModel.save = function () {