udpate

app/Transformers/DetailTopicTransformer.php

@@ -31,7 +31,7 @@ class DetailTopicTransformer extends TransformerAbstract{
             'page_count' => 0,
             'created_at' => Carbon::parse($topic['created_at'])->toDateTimeString(),
             'category_list'=>$category,
-            'base_count'=>$topic['$topic'],
+            'base_count'=>$topic['base_count'],
         ];
     }
 }