fix: escape double quotation marks in the vector DB search query (#6506)

api/core/rag/datasource/retrieval_service.py

                 )
 
                 documents = keyword.search(
-                    query,
+                    cls.escape_query_for_search(query),
                     top_k=top_k
                 )
                 all_documents.extend(documents)
                 )
 
                 documents = vector.search_by_vector(
-                    query,
+                    cls.escape_query_for_search(query),
                     search_type='similarity_score_threshold',
                     top_k=top_k,
                     score_threshold=score_threshold,
                 )
 
                 documents = vector_processor.search_by_full_text(
-                    query,
+                    cls.escape_query_for_search(query),
                     top_k=top_k
                 )
                 if documents:
                         all_documents.extend(documents)
             except Exception as e:
                 exceptions.append(str(e))
+
+    @staticmethod
+    def escape_query_for_search(query: str) -> str:
+        return query.replace('"', '\\"')

api/services/hit_testing_service.py

 
         all_documents = RetrievalService.retrieve(retrival_method=retrieval_model['search_method'],
                                                   dataset_id=dataset.id,
-                                                  query=query,
+                                                  query=cls.escape_query_for_search(query),
                                                   top_k=retrieval_model['top_k'],
                                                   score_threshold=retrieval_model['score_threshold']
                                                   if retrieval_model['score_threshold_enabled'] else None,
 
         if not query or len(query) > 250:
             raise ValueError('Query is required and cannot exceed 250 characters')
+
+    @staticmethod
+    def escape_query_for_search(query: str) -> str:
+        return query.replace('"', '\\"')