Fix chunk enable/disable issue (#3579)

### What problem does this PR solve?

#3576

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

rag/nlp/search.py

@@ -56,7 +56,7 @@ class Dealer:
             if key in req and req[key] is not None:
                 condition[field] = req[key]
         # TODO(yzc): `available_int` is nullable however infinity doesn't support nullable columns.
-        for key in ["knowledge_graph_kwd"]:
+        for key in ["knowledge_graph_kwd", "available_int"]:
             if key in req and req[key] is not None:
                 condition[key] = req[key]
         return condition

rag/utils/es_conn.py

@@ -121,8 +121,14 @@ class ESConnection(DocStoreConnection):
         bqry = Q("bool", must=[])
         condition["kb_id"] = knowledgebaseIds
         for k, v in condition.items():
-            if not isinstance(k, str) or not v:
+            if k == "available_int":
+                if v == 0:
+                    bqry.filter.append(Q("range", available_int={"lt": 1}))
+                else:
+                    bqry.filter.append(
+                        Q("bool", must_not=Q("range", available_int={"lt": 1})))
                 continue
+            if not v: continue
             if isinstance(v, list):
                 bqry.filter.append(Q("terms", **{k: v}))
             elif isinstance(v, str) or isinstance(v, int):