fix: 🐛 related (#2090)

now updates

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

backend/llm/api_brain_qa.py

@@ -331,7 +331,7 @@ async def generate_stream(
             chat_service.update_message_by_id(
                 message_id=str(streamed_chat_history.message_id),
                 user_message=question.question,
-                assistant="".join(response_tokens),
+                assistant="".join(str(token) for token in response_tokens),
                 metadata=self.metadata,
             )
 

backend/modules/brain/dto/inputs.py

@@ -30,7 +30,7 @@ class CreateBrainProperties(BaseModel, extra=Extra.forbid):
     status: Optional[str] = "private"
     model: Optional[str]
     temperature: Optional[float] = 0.0
-    max_tokens: Optional[int] = 256
+    max_tokens: Optional[int] = 2000
     prompt_id: Optional[UUID] = None
     brain_type: Optional[BrainType] = BrainType.DOC
     brain_definition: Optional[CreateApiBrainDefinition]

backend/modules/chat/controller/chat/brainful_chat.py

@@ -53,42 +53,47 @@ def get_answer_generator(
         user_id,
         chat_question,
     ):
-        brain_id_to_use = brain_id
         metadata = {}
-        if not brain_id:
-            brain_settings = BrainSettings()
-            supabase_client = get_supabase_client()
-            embeddings = None
-            if brain_settings.ollama_api_base_url:
-                embeddings = OllamaEmbeddings(
-                    base_url=brain_settings.ollama_api_base_url
-                )  # pyright: ignore reportPrivateUsage=none
-            else:
-                embeddings = OpenAIEmbeddings()
-            vector_store = CustomSupabaseVectorStore(
-                supabase_client, embeddings, table_name="vectors", user_id=user_id
-            )
-            # Get the first question from the chat_question
-
-            question = chat_question.question
-            history = chat_service.get_chat_history(chat_id)
-            if history:
-                question = history[0].user_message
-                brain_id_to_use = history[0].brain_id
-
-            list_brains = []
-            if history:
-                list_brains = vector_store.find_brain_closest_query(user_id, question)
-                metadata["close_brains"] = list_brains
-            else:
-                list_brains = vector_store.find_brain_closest_query(user_id, question)
-                if list_brains:
-                    brain_id_to_use = list_brains[0]["id"]
-                else:
-                    brain_id_to_use = None
-            # Add to metadata close_brains and close_brains_similarity
-            metadata["close_brains"] = list_brains
+        brain_settings = BrainSettings()
+        supabase_client = get_supabase_client()
+        embeddings = None
+        if brain_settings.ollama_api_base_url:
+            embeddings = OllamaEmbeddings(
+                base_url=brain_settings.ollama_api_base_url
+            )  # pyright: ignore reportPrivateUsage=none
+        else:
+            embeddings = OpenAIEmbeddings()
+        vector_store = CustomSupabaseVectorStore(
+            supabase_client, embeddings, table_name="vectors", user_id=user_id
+        )
+
+        # Init
+
+        brain_id_to_use = brain_id
+
+        # Get the first question from the chat_question
+
+        question = chat_question.question
+        history = chat_service.get_chat_history(chat_id)
+
+        list_brains = []  # To return
+
+        if history and not brain_id_to_use:
+            # Replace the question with the first question from the history
+            question = history[0].user_message
+
+        if history and not brain_id:
+            brain_id_to_use = history[0].brain_id
+
+        # Calculate the closest brains to the question
+        list_brains = vector_store.find_brain_closest_query(user_id, question)
+
+        metadata["close_brains"] = list_brains
+
+        if list_brains and not brain_id_to_use:
+            brain_id_to_use = list_brains[0]["id"]
 
+        # GENERIC
         follow_up_questions = chat_service.get_follow_up_question(chat_id)
         metadata["follow_up_questions"] = follow_up_questions
         metadata["model"] = model

backend/modules/chat/service/chat_service.py

@@ -99,7 +99,7 @@ def get_chat_history(self, chat_id: str) -> List[GetChatHistoryOutput]:
                         assistant=message.assistant,
                         message_time=message.message_time,
                         brain_name=brain.name if brain else None,
-                        brain_id=brain.id if brain else None,
+                        brain_id=str(brain.id) if brain else None,
                         prompt_title=prompt.title if prompt else None,
                         metadata=message.metadata,
                     )