update document sdk (#2445)

### What problem does this PR solve?


### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: Kevin Hu <[email protected]>

api/apps/sdk/doc.py

@@ -84,15 +84,28 @@ def upload(dataset_id, tenant_id):
 @token_required
 def docinfos(tenant_id):
     req = request.args
+    if "id" not in req and "name" not in req:
+        return get_data_error_result(
+            retmsg="Id or name should be provided")
+    doc_id=None
     if "id" in req:
         doc_id = req["id"]
-        e, doc = DocumentService.get_by_id(doc_id)
-        return get_json_result(data=doc.to_json())
     if "name" in req:
         doc_name = req["name"]
         doc_id = DocumentService.get_doc_id_by_doc_name(doc_name)
-        e, doc = DocumentService.get_by_id(doc_id)
-        return get_json_result(data=doc.to_json())
+    e, doc = DocumentService.get_by_id(doc_id)
+    #rename key's name
+    key_mapping = {
+        "chunk_num": "chunk_count",
+        "kb_id": "knowledgebase_id",
+        "token_num": "token_count",
+    }
+    renamed_doc = {}
+    for key, value in doc.to_dict().items():
+        new_key = key_mapping.get(key, key)
+        renamed_doc[new_key] = value
+
+    return get_json_result(data=renamed_doc)
 
 
 @manager.route('/save', methods=['POST'])
@@ -246,7 +259,7 @@ def rename():
                 req["doc_id"], {"name": req["name"]}):
             return get_data_error_result(
                 retmsg="Database error (Document rename)!")
-
+          
         informs = File2DocumentService.get_by_document_id(req["doc_id"])
         if informs:
             e, file = FileService.get_by_id(informs[0].file_id)
@@ -259,7 +272,7 @@ def rename():
 
 @manager.route("/<document_id>", methods=["GET"])
 @token_required
-def download_document(dataset_id, document_id):
+def download_document(dataset_id, document_id,tenant_id):
     try:
         # Check whether there is this document
         exist, document = DocumentService.get_by_id(document_id)
@@ -313,7 +326,21 @@ def list_docs(dataset_id, tenant_id):
     try:
         docs, tol = DocumentService.get_by_kb_id(
             kb_id, page_number, items_per_page, orderby, desc, keywords)
-        return get_json_result(data={"total": tol, "docs": docs})
+
+        # rename key's name
+        renamed_doc_list = []
+        for doc in docs:
+            key_mapping = {
+                "chunk_num": "chunk_count",
+                "kb_id": "knowledgebase_id",
+                "token_num": "token_count",
+            }
+            renamed_doc = {}
+            for key, value in doc.items():
+                new_key = key_mapping.get(key, key)
+                renamed_doc[new_key] = value
+            renamed_doc_list.append(renamed_doc)
+        return get_json_result(data={"total": tol, "docs": renamed_doc_list})
     except Exception as e:
         return server_error_response(e)
 
@@ -436,6 +463,8 @@ def list_chunk(tenant_id):
             query["available_int"] = int(req["available_int"])
         sres = retrievaler.search(query, search.index_name(tenant_id), highlight=True)
         res = {"total": sres.total, "chunks": [], "doc": doc.to_dict()}
+
+        origin_chunks=[]
         for id in sres.ids:
             d = {
                 "chunk_id": id,
@@ -455,7 +484,21 @@ def list_chunk(tenant_id):
                     poss.append([float(d["positions"][i]), float(d["positions"][i + 1]), float(d["positions"][i + 2]),
                                  float(d["positions"][i + 3]), float(d["positions"][i + 4])])
                 d["positions"] = poss
-            res["chunks"].append(d)
+                
+            origin_chunks.append(d)
+            ##rename keys
+            for chunk in origin_chunks:
+                key_mapping = {
+                    "chunk_id": "id",
+                    "content_with_weight": "content",
+                    "doc_id": "document_id",
+                    "important_kwd": "important_keywords",
+                }
+                renamed_chunk = {}
+                for key, value in chunk.items():
+                    new_key = key_mapping.get(key, key)
+                    renamed_chunk[new_key] = value
+                res["chunks"].append(renamed_chunk)
         return get_json_result(data=res)
     except Exception as e:
         if str(e).find("not_found") > 0:
@@ -471,8 +514,9 @@ def create(tenant_id):
     req = request.json
     md5 = hashlib.md5()
     md5.update((req["content_with_weight"] + req["doc_id"]).encode("utf-8"))
-    chunck_id = md5.hexdigest()
-    d = {"id": chunck_id, "content_ltks": rag_tokenizer.tokenize(req["content_with_weight"]),
+
+    chunk_id = md5.hexdigest()
+    d = {"id": chunk_id, "content_ltks": rag_tokenizer.tokenize(req["content_with_weight"]),
          "content_with_weight": req["content_with_weight"]}
     d["content_sm_ltks"] = rag_tokenizer.fine_grained_tokenize(d["content_ltks"])
     d["important_kwd"] = req.get("important_kwd", [])
@@ -503,20 +547,33 @@ def create(tenant_id):
 
         DocumentService.increment_chunk_num(
             doc.id, doc.kb_id, c, 1, 0)
-        return get_json_result(data={"chunk": d})
-        # return get_json_result(data={"chunk_id": chunck_id})
+        d["chunk_id"] = chunk_id
+        #rename keys
+        key_mapping = {
+            "chunk_id": "id",
+            "content_with_weight": "content",
+            "doc_id": "document_id",
+            "important_kwd": "important_keywords",
+            "kb_id":"knowledge_base_id",
+        }
+        renamed_chunk = {}
+        for key, value in d.items():
+            new_key = key_mapping.get(key, key)
+            renamed_chunk[new_key] = value
+
+        return get_json_result(data={"chunk": renamed_chunk})
+        # return get_json_result(data={"chunk_id": chunk_id})
     except Exception as e:
         return server_error_response(e)
 
-
 @manager.route('/chunk/rm', methods=['POST'])
 @token_required
 @validate_request("chunk_ids", "doc_id")
-def rm_chunk():
+def rm_chunk(tenant_id):
     req = request.json
     try:
         if not ELASTICSEARCH.deleteByQuery(
-                Q("ids", values=req["chunk_ids"]), search.index_name(current_user.id)):
+                Q("ids", values=req["chunk_ids"]), search.index_name(tenant_id)):
             return get_data_error_result(retmsg="Index updating failure")
         e, doc = DocumentService.get_by_id(req["doc_id"])
         if not e:
@@ -526,4 +583,126 @@ def rm_chunk():
         DocumentService.decrement_chunk_num(doc.id, doc.kb_id, 1, chunk_number, 0)
         return get_json_result(data=True)
     except Exception as e:
+        return server_error_response(e)
+
+@manager.route('/chunk/set', methods=['POST'])
+@token_required
+@validate_request("doc_id", "chunk_id", "content_with_weight",
+                  "important_kwd")
+def set(tenant_id):
+    req = request.json
+    d = {
+        "id": req["chunk_id"],
+        "content_with_weight": req["content_with_weight"]}
+    d["content_ltks"] = rag_tokenizer.tokenize(req["content_with_weight"])
+    d["content_sm_ltks"] = rag_tokenizer.fine_grained_tokenize(d["content_ltks"])
+    d["important_kwd"] = req["important_kwd"]
+    d["important_tks"] = rag_tokenizer.tokenize(" ".join(req["important_kwd"]))
+    if "available_int" in req:
+        d["available_int"] = req["available_int"]
+
+    try:
+        tenant_id = DocumentService.get_tenant_id(req["doc_id"])
+        if not tenant_id:
+            return get_data_error_result(retmsg="Tenant not found!")
+
+        embd_id = DocumentService.get_embd_id(req["doc_id"])
+        embd_mdl = TenantLLMService.model_instance(
+            tenant_id, LLMType.EMBEDDING.value, embd_id)
+
+        e, doc = DocumentService.get_by_id(req["doc_id"])
+        if not e:
+            return get_data_error_result(retmsg="Document not found!")
+
+        if doc.parser_id == ParserType.QA:
+            arr = [
+                t for t in re.split(
+                    r"[\n\t]",
+                    req["content_with_weight"]) if len(t) > 1]
+            if len(arr) != 2:
+                return get_data_error_result(
+                    retmsg="Q&A must be separated by TAB/ENTER key.")
+            q, a = rmPrefix(arr[0]), rmPrefix(arr[1])
+            d = beAdoc(d, arr[0], arr[1], not any(
+                [rag_tokenizer.is_chinese(t) for t in q + a]))
+
+        v, c = embd_mdl.encode([doc.name, req["content_with_weight"]])
+        v = 0.1 * v[0] + 0.9 * v[1] if doc.parser_id != ParserType.QA else v[1]
+        d["q_%d_vec" % len(v)] = v.tolist()
+        ELASTICSEARCH.upsert([d], search.index_name(tenant_id))
+        return get_json_result(data=True)
+    except Exception as e:
+        return server_error_response(e)
+
+@manager.route('/retrieval_test', methods=['POST'])
+@token_required
+@validate_request("kb_id", "question")
+def retrieval_test(tenant_id):
+    req = request.json
+    page = int(req.get("page", 1))
+    size = int(req.get("size", 30))
+    question = req["question"]
+    kb_id = req["kb_id"]
+    if isinstance(kb_id, str): kb_id = [kb_id]
+    doc_ids = req.get("doc_ids", [])
+    similarity_threshold = float(req.get("similarity_threshold", 0.2))
+    vector_similarity_weight = float(req.get("vector_similarity_weight", 0.3))
+    top = int(req.get("top_k", 1024))
+
+    try:
+        tenants = UserTenantService.query(user_id=tenant_id)
+        for kid in kb_id:
+            for tenant in tenants:
+                if KnowledgebaseService.query(
+                        tenant_id=tenant.tenant_id, id=kid):
+                    break
+            else:
+                return get_json_result(
+                    data=False, retmsg=f'Only owner of knowledgebase authorized for this operation.',
+                    retcode=RetCode.OPERATING_ERROR)
+
+        e, kb = KnowledgebaseService.get_by_id(kb_id[0])
+        if not e:
+            return get_data_error_result(retmsg="Knowledgebase not found!")
+
+        embd_mdl = TenantLLMService.model_instance(
+            kb.tenant_id, LLMType.EMBEDDING.value, llm_name=kb.embd_id)
+
+        rerank_mdl = None
+        if req.get("rerank_id"):
+            rerank_mdl = TenantLLMService.model_instance(
+                kb.tenant_id, LLMType.RERANK.value, llm_name=req["rerank_id"])
+
+        if req.get("keyword", False):
+            chat_mdl = TenantLLMService.model_instance(kb.tenant_id, LLMType.CHAT)
+            question += keyword_extraction(chat_mdl, question)
+
+        retr = retrievaler if kb.parser_id != ParserType.KG else kg_retrievaler
+        ranks = retr.retrieval(question, embd_mdl, kb.tenant_id, kb_id, page, size,
+                               similarity_threshold, vector_similarity_weight, top,
+                               doc_ids, rerank_mdl=rerank_mdl, highlight=req.get("highlight"))
+        for c in ranks["chunks"]:
+            if "vector" in c:
+                del c["vector"]
+
+        ##rename keys
+        renamed_chunks=[]
+        for chunk in ranks["chunks"]:
+            key_mapping = {
+                "chunk_id": "id",
+                "content_with_weight": "content",
+                "doc_id": "document_id",
+                "important_kwd": "important_keywords",
+            }
+            rename_chunk={}
+            for key, value in chunk.items():
+                new_key = key_mapping.get(key, key)
+                rename_chunk[new_key] = value
+                renamed_chunks.append(rename_chunk)
+        ranks["chunks"] = renamed_chunks
+        return get_json_result(data=ranks)
+    except Exception as e:
+        if str(e).find("not_found") > 0:
+            return get_json_result(data=False, retmsg=f'No chunk found! Check the chunk status please!',
+                                   retcode=RetCode.DATA_ERROR)
         return server_error_response(e)

sdk/python/ragflow/modules/chunk.py

@@ -3,32 +3,48 @@ from .base import Base
 
 class Chunk(Base):
     def __init__(self, rag, res_dict):
-        # 初始化类的属性
         self.id = ""
-        self.content_with_weight = ""
-        self.content_ltks = []
-        self.content_sm_ltks = []
-        self.important_kwd = []
-        self.important_tks = []
+        self.content = ""
+        self.important_keywords = []
         self.create_time = ""
         self.create_timestamp_flt = 0.0
-        self.kb_id = None
-        self.docnm_kwd = ""
-        self.doc_id = ""
-        self.q_vec = []
+        self.knowledgebase_id = None
+        self.document_name = ""
+        self.document_id = ""
         self.status = "1"
-        for k, v in res_dict.items():
-            if hasattr(self, k):
-                setattr(self, k, v)
-
+        for k in list(res_dict.keys()):
+            if k not in self.__dict__:
+                res_dict.pop(k)
         super().__init__(rag, res_dict)
+
     def delete(self) -> bool:
         """
         Delete the chunk in the document.
         """
-        res = self.rm('/doc/chunk/rm',
-                      {"doc_id": [self.id],""})
+        res = self.post('/doc/chunk/rm',
+                        {"doc_id": self.document_id, 'chunk_ids': [self.id]})
         res = res.json()
         if res.get("retmsg") == "success":
             return True
-        raise Exception(res["retmsg"])
+        raise Exception(res["retmsg"])
+
+    def save(self) -> bool:
+        """
+        Save the document details to the server.
+        """
+        res = self.post('/doc/chunk/set',
+                        {"chunk_id": self.id,
+                         "kb_id": self.knowledgebase_id,
+                         "name": self.document_name,
+                         "content_with_weight": self.content,
+                         "important_kwd": self.important_keywords,
+                         "create_time": self.create_time,
+                         "create_timestamp_flt": self.create_timestamp_flt,
+                         "doc_id": self.document_id,
+                         "status": self.status,
+                         })
+        res = res.json()
+        if res.get("retmsg") == "success":
+            return True
+        raise Exception(res["retmsg"])
+

sdk/python/ragflow/modules/document.py

@@ -9,15 +9,15 @@ class Document(Base):
         self.id = ""
         self.name = ""
         self.thumbnail = None
-        self.kb_id = None
+        self.knowledgebase_id = None
         self.parser_method = ""
         self.parser_config = {"pages": [[1, 1000000]]}
         self.source_type = "local"
         self.type = ""
         self.created_by = ""
         self.size = 0
-        self.token_num = 0
-        self.chunk_num = 0
+        self.token_count = 0
+        self.chunk_count = 0
         self.progress = 0.0
         self.progress_msg = ""
         self.process_begin_at = None
@@ -34,10 +34,10 @@ class Document(Base):
         Save the document details to the server.
         """
         res = self.post('/doc/save',
-                        {"id": self.id, "name": self.name, "thumbnail": self.thumbnail, "kb_id": self.kb_id,
+                        {"id": self.id, "name": self.name, "thumbnail": self.thumbnail, "kb_id": self.knowledgebase_id,
                          "parser_id": self.parser_method, "parser_config": self.parser_config.to_json(),
                          "source_type": self.source_type, "type": self.type, "created_by": self.created_by,
-                         "size": self.size, "token_num": self.token_num, "chunk_num": self.chunk_num,
+                         "size": self.size, "token_num": self.token_count, "chunk_num": self.chunk_count,
                          "progress": self.progress, "progress_msg": self.progress_msg,
                          "process_begin_at": self.process_begin_at, "process_duation": self.process_duration
                          })
@@ -177,8 +177,10 @@ class Document(Base):
         if res.status_code == 200:
             res_data = res.json()
             if res_data.get("retmsg") == "success":
-                chunks = res_data["data"]["chunks"]
-                self.chunks = chunks  # Store the chunks in the document instance
+                chunks=[]
+                for chunk_data in res_data["data"].get("chunks", []):
+                    chunk=Chunk(self.rag,chunk_data)
+                    chunks.append(chunk)
                 return chunks
             else:
                 raise Exception(f"Error fetching chunks: {res_data.get('retmsg')}")
@@ -187,10 +189,9 @@ class Document(Base):
 
     def add_chunk(self, content: str):
         res = self.post('/doc/chunk/create', {"doc_id": self.id, "content_with_weight":content})
-
-        # 假设返回的 response 包含 chunk 的信息
         if res.status_code == 200:
-            chunk_data = res.json()
-            return Chunk(self.rag,chunk_data)  # 假设有一个 Chunk 类来处理 chunk 对象
+            res_data = res.json().get("data")
+            chunk_data = res_data.get("chunk")
+            return Chunk(self.rag,chunk_data)
         else:
             raise Exception(f"Failed to add chunk: {res.status_code} {res.text}")

sdk/python/ragflow/ragflow.py

@@ -20,6 +20,8 @@ import requests
 from .modules.assistant import Assistant
 from .modules.dataset import DataSet
 from .modules.document import Document
+from .modules.chunk import Chunk
+
 
 class RAGFlow:
     def __init__(self, user_key, base_url, version='v1'):
@@ -143,7 +145,7 @@ class RAGFlow:
             return result_list
         raise Exception(res["retmsg"])
 
-    def create_document(self, ds:DataSet, name: str, blob: bytes) -> bool:
+    def create_document(self, ds: DataSet, name: str, blob: bytes) -> bool:
         url = f"/doc/dataset/{ds.id}/documents/upload"
         files = {
             'file': (name, blob)
@@ -164,6 +166,7 @@ class RAGFlow:
             raise Exception(f"Upload failed: {response.json().get('retmsg')}")
 
         return False
+
     def get_document(self, id: str = None, name: str = None) -> Document:
         res = self.get("/doc/infos", {"id": id, "name": name})
         res = res.json()
@@ -204,8 +207,6 @@ class RAGFlow:
             if not doc_ids or not isinstance(doc_ids, list):
                 raise ValueError("doc_ids must be a non-empty list of document IDs")
             data = {"doc_ids": doc_ids, "run": 2}
-
-
             res = self.post(f'/doc/run', data)
 
             if res.status_code != 200:
@@ -217,4 +218,61 @@ class RAGFlow:
             print(f"Error occurred during canceling parsing for documents: {str(e)}")
             raise
 
+    def retrieval(self,
+                  question,
+                  datasets=None,
+                  documents=None,
+                  offset=0,
+                  limit=6,
+                  similarity_threshold=0.1,
+                  vector_similarity_weight=0.3,
+                  top_k=1024):
+        """
+        Perform document retrieval based on the given parameters.
+
+        :param question: The query question.
+        :param datasets: A list of datasets (optional, as documents may be provided directly).
+        :param documents: A list of documents (if specific documents are provided).
+        :param offset: Offset for the retrieval results.
+        :param limit: Maximum number of retrieval results.
+        :param similarity_threshold: Similarity threshold.
+        :param vector_similarity_weight: Weight of vector similarity.
+        :param top_k: Number of top most similar documents to consider (for pre-filtering or ranking).
+
+        Note: This is a hypothetical implementation and may need adjustments based on the actual backend service API.
+        """
+        try:
+            data = {
+                "question": question,
+                "datasets": datasets if datasets is not None else [],
+                "documents": [doc.id if hasattr(doc, 'id') else doc for doc in
+                              documents] if documents is not None else [],
+                "offset": offset,
+                "limit": limit,
+                "similarity_threshold": similarity_threshold,
+                "vector_similarity_weight": vector_similarity_weight,
+                "top_k": top_k,
+                "kb_id": datasets,
+            }
+
+            # Send a POST request to the backend service (using requests library as an example, actual implementation may vary)
+            res = self.post(f'/doc/retrieval_test', data)
+
+            # Check the response status code
+            if res.status_code == 200:
+                res_data = res.json()
+                if res_data.get("retmsg") == "success":
+                    chunks = []
+                    for chunk_data in res_data["data"].get("chunks", []):
+                        chunk = Chunk(self, chunk_data)
+                        chunks.append(chunk)
+                    return chunks
+                else:
+                    raise Exception(f"Error fetching chunks: {res_data.get('retmsg')}")
+            else:
+                raise Exception(f"API request failed with status code {res.status_code}")
+
+        except Exception as e:
+            print(f"An error occurred during retrieval: {e}")
+            raise
 

sdk/python/test/t_document.py

@@ -41,6 +41,7 @@ class TestDocument(TestSdk):
     def test_update_document_with_success(self):
         """
         Test updating a document with success.
+        Update name or parser_method are supported
         """
         rag = RAGFlow(API_KEY, HOST_ADDRESS)
         doc = rag.get_document(name="TestDocument.txt")
@@ -60,7 +61,7 @@ class TestDocument(TestSdk):
         rag = RAGFlow(API_KEY, HOST_ADDRESS)
 
         # Retrieve a document
-        doc = rag.get_document(name="TestDocument.txt")
+        doc = rag.get_document(name="manual.txt")
 
         # Check if the retrieved document is of type Document
         if isinstance(doc, Document):
@@ -147,14 +148,16 @@ class TestDocument(TestSdk):
         ds = rag.create_dataset(name="God4")
 
         # Define the document name and path
-        name3 = 'ai.pdf'
-        path = 'test_data/ai.pdf'
+        name3 = 'westworld.pdf'
+        path = 'test_data/westworld.pdf'
+
 
         # Create a document in the dataset using the file path
         rag.create_document(ds, name=name3, blob=open(path, "rb").read())
 
         # Retrieve the document by name
-        doc = rag.get_document(name="ai.pdf")
+        doc = rag.get_document(name="westworld.pdf")
+
 
         # Initiate asynchronous parsing
         doc.async_parse()
@@ -185,9 +188,9 @@ class TestDocument(TestSdk):
 
         # Prepare a list of file names and paths
         documents = [
-            {'name': 'ai1.pdf', 'path': 'test_data/ai1.pdf'},
-            {'name': 'ai2.pdf', 'path': 'test_data/ai2.pdf'},
-            {'name': 'ai3.pdf', 'path': 'test_data/ai3.pdf'}
+            {'name': 'test1.txt', 'path': 'test_data/test1.txt'},
+            {'name': 'test2.txt', 'path': 'test_data/test2.txt'},
+            {'name': 'test3.txt', 'path': 'test_data/test3.txt'}
         ]
 
         # Create documents in bulk
@@ -248,6 +251,7 @@ class TestDocument(TestSdk):
             print(c)
             assert c is not None, "Chunk is None"
             assert "rag" in c['content_with_weight'].lower(), f"Keyword 'rag' not found in chunk content: {c.content}"
+
     def test_add_chunk_to_chunk_list(self):
         rag = RAGFlow(API_KEY, HOST_ADDRESS)
         doc = rag.get_document(name='story.txt')
@@ -258,12 +262,44 @@ class TestDocument(TestSdk):
     def test_delete_chunk_of_chunk_list(self):
         rag = RAGFlow(API_KEY, HOST_ADDRESS)
         doc = rag.get_document(name='story.txt')
-
         chunk = doc.add_chunk(content="assss")
         assert chunk is not None, "Chunk is None"
         assert isinstance(chunk, Chunk), "Chunk was not added to chunk list"
-        chunk_num_before=doc.chunk_num
+        doc = rag.get_document(name='story.txt')
+        chunk_count_before=doc.chunk_count
         chunk.delete()
-        assert doc.chunk_num == chunk_num_before-1, "Chunk was not deleted"
-
-
+        doc = rag.get_document(name='story.txt')
+        assert doc.chunk_count == chunk_count_before-1, "Chunk was not deleted"
+       
+    def test_update_chunk_content(self):
+        rag = RAGFlow(API_KEY, HOST_ADDRESS)
+        doc = rag.get_document(name='story.txt')
+        chunk = doc.add_chunk(content="assssd")
+        assert chunk is not None, "Chunk is None"
+        assert isinstance(chunk, Chunk), "Chunk was not added to chunk list"
+        chunk.content = "ragflow123"
+        res=chunk.save()
+        assert res is True, f"Failed to update chunk, error: {res}"
+        
+    def test_retrieval_chunks(self):
+        rag = RAGFlow(API_KEY, HOST_ADDRESS)
+        ds = rag.create_dataset(name="God8")
+        name = 'ragflow_test.txt'
+        path = 'test_data/ragflow_test.txt'
+        rag.create_document(ds, name=name, blob=open(path, "rb").read())
+        doc = rag.get_document(name=name)
+        doc.async_parse()
+        # Wait for parsing to complete and get progress updates using join
+        for progress, msg in doc.join(interval=5, timeout=30):
+            print(progress, msg)
+            assert 0 <= progress <= 100, f"Invalid progress: {progress}"
+            assert msg, "Message should not be empty"
+        for c in rag.retrieval(question="What's ragflow?",
+                               datasets=[ds.id], documents=[doc],
+                               offset=0, limit=6, similarity_threshold=0.1,
+                               vector_similarity_weight=0.3,
+                               top_k=1024
+                               ):
+            print(c)
+            assert c is not None, "Chunk is None"
+            assert "ragflow" in c.content.lower(), f"Keyword 'rag' not found in chunk content: {c.content}"