Fix: missing parent chunk issue. (#12789)

### What problem does this PR solve?

Close #12783

### Type of change

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

agent/component/categorize.py

@@ -147,7 +147,7 @@ class Categorize(LLM, ABC):
             category_counts[c] = count
 
         cpn_ids = list(self._param.category_description.items())[-1][1]["to"]
-        max_category = list(self._param.category_description.keys())[0]
+        max_category = list(self._param.category_description.keys())[-1]
         if any(category_counts.values()):
             max_category = max(category_counts.items(), key=lambda x: x[1])[0]
             cpn_ids = self._param.category_description[max_category]["to"]

api/apps/sdk/dify_retrieval.py

@@ -148,6 +148,7 @@ async def retrieval(tenant_id):
             doc_ids=doc_ids,
             rank_feature=label_question(question, [kb])
         )
+        ranks["chunks"] = settings.retriever.retrieval_by_children(ranks["chunks"], [tenant_id])
 
         if use_kg:
             ck = await settings.kg_retriever.retrieval(question,

api/apps/sdk/doc.py

@@ -1579,6 +1579,7 @@ async def retrieval_test(tenant_id):
             cks = await settings.retriever.retrieval_by_toc(question, ranks["chunks"], tenant_ids, chat_mdl, size)
             if cks:
                 ranks["chunks"] = cks
+        ranks["chunks"] = settings.retriever.retrieval_by_children(ranks["chunks"], tenant_ids)
         if use_kg:
             ck = await settings.kg_retriever.retrieval(question, [k.tenant_id for k in kbs], kb_ids, embd_mdl, LLMBundle(kb.tenant_id, LLMType.CHAT))
             if ck["content_with_weight"]:

api/db/services/document_service.py

@@ -786,6 +786,8 @@ class DocumentService(CommonService):
                 return "string"
             if isinstance(value, (int, float)):
                 return "number"
+            if re.match(r"\d{4}\-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}", str(value)):
+                return "time"
             return "string"
 
         fields = [cls.model.id, cls.model.meta_fields]