Update TopicFilter.php

app/Http/Controllers/API/TopicFilter.php

@@ -21,9 +21,12 @@ class TopicFilter extends Controller
             "per_page" => "nullable|numeric"
         ]);
 
-        $topics = explode(',', $request->get('keys'));
+        $keys = explode(',', $request->get('keys'));
 
-        return Article::FilterArticleByTopics($topics)
+        return Article::with('source')->whereHas('topics', function ($q) use ($keys) {
-                        ->paginate($request->get('per_page')?:8);
+            $q->whereIn('slug', $keys);
+        })
+            ->latest('published_date')
+            ->paginate($request->get('per_page')?:8);
     }
 }