fix: Update import statements for OllamaEmbeddings (#2584)

This pull request fixes the import statements for OllamaEmbeddings in
multiple files. The import statements are updated to use the correct
package name "langchain_community.embeddings" instead of
"langchain.embeddings.ollama". This ensures that the code can be
compiled and executed without any import errors.

backend/models/settings.py

@@ -1,7 +1,7 @@
 from typing import Optional
 from uuid import UUID
 
-from langchain.embeddings.ollama import OllamaEmbeddings
+from langchain_community.embeddings import OllamaEmbeddings
 from langchain_openai import OpenAIEmbeddings
 from logger import get_logger
 from models.databases.supabase.supabase import SupabaseDB

backend/modules/brain/integrations/GPT4/Brain.py

@@ -51,7 +51,7 @@ class GPT4Brain(KnowledgeBrainQA):
 
     tools: Optional[List[BaseTool]] = None
     tool_executor: Optional[ToolExecutor] = None
-    model_function: ChatOpenAI = None
+    function_model: ChatOpenAI = None
 
     def __init__(
         self,
@@ -90,7 +90,7 @@ class GPT4Brain(KnowledgeBrainQA):
     # Define the function that calls the model
     def call_model(self, state):
         messages = state["messages"]
-        response = self.model_function.invoke(messages)
+        response = self.function_model.invoke(messages)
         # We return a list, because this will get added to the existing list
         return {"messages": [response]}
 
@@ -166,11 +166,11 @@ class GPT4Brain(KnowledgeBrainQA):
         return app
 
     def get_chain(self):
-        self.model_function = ChatOpenAI(
+        self.function_model = ChatOpenAI(
             model="gpt-4-turbo", temperature=0, streaming=True
         )
 
-        self.model_function = self.model_function.bind_tools(self.tools)
+        self.function_model = self.function_model.bind_tools(self.tools)
 
         graph = self.create_graph()
 

backend/modules/brain/rags/quivr_rag.py

@@ -4,7 +4,7 @@ from typing import List, Optional
 from uuid import UUID
 
 from langchain.chains import ConversationalRetrievalChain
-from langchain.embeddings.ollama import OllamaEmbeddings
+from langchain_community.embeddings import OllamaEmbeddings
 from langchain.llms.base import BaseLLM
 from langchain.prompts import HumanMessagePromptTemplate, SystemMessagePromptTemplate
 from langchain.retrievers import ContextualCompressionRetriever

backend/modules/chat/controller/chat_routes.py

@@ -3,7 +3,7 @@ from uuid import UUID
 
 from fastapi import APIRouter, Depends, HTTPException, Query, Request
 from fastapi.responses import StreamingResponse
-from langchain.embeddings.ollama import OllamaEmbeddings
+from langchain_community.embeddings import OllamaEmbeddings
 from langchain_openai import OpenAIEmbeddings
 from logger import get_logger
 from middlewares.auth import AuthBearer, get_current_user