Added more options to "order", in the Recommendations API (#18487)

closes https://github.com/TryGhost/Product/issues/4000

ghost/recommendations/src/RecommendationController.ts

@@ -17,9 +17,14 @@ const RecommendationIncludesMap = {
 };
 
 const RecommendationOrderMap = {
+    title: 'title' as const,
+    reason: 'reason' as const,
+    excerpt: 'excerpt' as const,
+    one_click_subscribe: 'oneClickSubscribe' as const,
+    created_at: 'createdAt' as const,
+    updated_at: 'updatedAt' as const,
     'count.clicks': 'clickCount' as const,
-    'count.subscribers': 'subscriberCount' as const,
-    created_at: 'createdAt' as const
+    'count.subscribers': 'subscriberCount' as const
 };
 
 export class RecommendationController {

ghost/recommendations/test/RecommendationController.test.ts

@@ -489,7 +489,7 @@ describe('RecommendationController', function () {
                         user: {}
                     }),
                     {
-                        message: 'order.0.field must be one of count.clicks, count.subscribers, created_at'
+                        message: 'order.0.field must be one of title, reason, excerpt, one_click_subscribe, created_at, updated_at, count.clicks, count.subscribers'
                     }
                 );
             });