chore: simplify local index code (#537)

Author: leehuwuj

.changeset/grumpy-tigers-heal.md

@@ -0,0 +1,5 @@
+---
+"create-llama": patch
+---
+
+Simplify the local index code.

templates/components/workflows/python/agentic_rag/workflow.py

@@ -9,11 +9,12 @@
 
 
 def create_workflow(chat_request: Optional[ChatRequest] = None) -> AgentWorkflow:
-    query_tool = get_query_engine_tool(index=get_index(chat_request=chat_request))
-    if query_tool is None:
+    index = get_index(chat_request=chat_request)
+    if index is None:
         raise RuntimeError(
             "Index not found! Please run `poetry run generate` to index the data first."
         )
+    query_tool = get_query_engine_tool(index=index)
     return AgentWorkflow.from_tools_or_functions(
         tools_or_functions=[query_tool],
         llm=Settings.llm or OpenAI(model="gpt-4o-mini"),

templates/types/llamaindexserver/fastapi/app/index.py

@@ -5,28 +5,19 @@
 from llama_index.core.indices import load_index_from_storage
 from llama_index.server.api.models import ChatRequest
 from llama_index.server.tools.index.utils import get_storage_context
-from pydantic import BaseModel
 
 logger = logging.getLogger("uvicorn")
 
-
-class IndexConfig(BaseModel):
-    storage_dir: str = "storage"
-
-    @classmethod
-    def from_default(cls, chat_request: Optional[ChatRequest] = None) -> "IndexConfig":
-        return cls()
+STORAGE_DIR = "storage"
 
 
 def get_index(chat_request: Optional[ChatRequest] = None):
-    config = IndexConfig.from_default(chat_request)
-    storage_dir = config.storage_dir
     # check if storage already exists
-    if not os.path.exists(storage_dir):
+    if not os.path.exists(STORAGE_DIR):
         return None
     # load the existing index
-    logger.info(f"Loading index from {storage_dir}...")
-    storage_context = get_storage_context(storage_dir)
+    logger.info(f"Loading index from {STORAGE_DIR}...")
+    storage_context = get_storage_context(STORAGE_DIR)
     index = load_index_from_storage(storage_context)
-    logger.info(f"Finished loading index from {storage_dir}")
+    logger.info(f"Finished loading index from {STORAGE_DIR}")
     return index

templates/types/llamaindexserver/fastapi/generate.py

@@ -1,9 +1,9 @@
 import logging
 import os
 
-from dotenv import load_dotenv
-
+from app.index import STORAGE_DIR
 from app.settings import init_settings
+from dotenv import load_dotenv
 from llama_index.core.indices import (
     VectorStoreIndex,
 )
@@ -18,7 +18,6 @@ def generate_datasource():
     init_settings()
 
     logger.info("Creating new index")
-    storage_dir = os.environ.get("STORAGE_DIR", "storage")
     # load the documents and create the index
     reader = SimpleDirectoryReader(
         os.environ.get("DATA_DIR", "data"),
@@ -30,5 +29,5 @@ def generate_datasource():
         show_progress=True,
     )
     # store it for later
-    index.storage_context.persist(storage_dir)
-    logger.info(f"Finished creating new index. Stored in {storage_dir}")
+    index.storage_context.persist(STORAGE_DIR)
+    logger.info(f"Finished creating new index. Stored in {STORAGE_DIR}")