add

search/utils/topic.py

@@ -769,6 +769,23 @@ class TopicUtils(object):
             }
 
         }
+        if query == '':
+            q["query"] = {
+                "function_score": {
+                    "functions": [{
+                        "filter": {
+                            "bool": {
+                                "must": must,
+                                "must_not": cls.process_nfilters(nfilters),
+                            }
+                        },
+                        "weight": 1
+                    }]
+                }
+
+            }
+
+
         logging.info("get query business_topic:%s" % q)
         if sorts_by:
             sorts = cls.process_sort(sorts_by)