ref: Make create_or_update_starter_projects async (#5165)

Make create_or_update_starter_projects async

src/backend/base/langflow/initial_setup/setup.py

@@ -1,11 +1,10 @@
+import asyncio
 import copy
 import json
 import shutil
-import time
 from collections import defaultdict
 from copy import deepcopy
 from datetime import datetime, timezone
-from pathlib import Path
 from uuid import UUID
 
 import anyio
@@ -14,6 +13,7 @@ from aiofile import async_open
 from emoji import demojize, purely_emoji
 from loguru import logger
 from sqlalchemy.exc import NoResultFound
+from sqlalchemy.orm import selectinload
 from sqlmodel import select
 
 from langflow.base.constants import FIELD_FORMAT_ATTRIBUTES, NODE_FORMAT_ATTRIBUTES, ORJSON_OPTIONS
@@ -31,7 +31,6 @@ from langflow.services.deps import (
     get_settings_service,
     get_storage_service,
     get_variable_service,
-    session_scope,
 )
 from langflow.template.field.prompt import DEFAULT_PROMPT_INTUT_TYPES
 from langflow.utils.util import escape_json_dump
@@ -362,13 +361,14 @@ def log_node_changes(node_changes_log) -> None:
         logger.debug("\n".join(formatted_messages))
 
 
-def load_starter_projects(retries=3, delay=1) -> list[tuple[Path, dict]]:
+async def load_starter_projects(retries=3, delay=1) -> list[tuple[anyio.Path, dict]]:
     starter_projects = []
-    folder = Path(__file__).parent / "starter_projects"
+    folder = anyio.Path(__file__).parent / "starter_projects"
-    for file in folder.glob("*.json"):
+    async for file in folder.glob("*.json"):
         attempt = 0
         while attempt < retries:
-            content = file.read_text(encoding="utf-8")
+            async with async_open(str(file), "r", encoding="utf-8") as f:
+                content = await f.read()
             try:
                 project = orjson.loads(content)
                 starter_projects.append((file, project))
@@ -379,27 +379,27 @@ def load_starter_projects(retries=3, delay=1) -> list[tuple[Path, dict]]:
                 if attempt >= retries:
                     msg = f"Error loading starter project {file}: {e}"
                     raise ValueError(msg) from e
-                time.sleep(delay)  # Wait before retrying
+                await asyncio.sleep(delay)  # Wait before retrying
     return starter_projects
 
 
-def copy_profile_pictures() -> None:
+async def copy_profile_pictures() -> None:
     config_dir = get_storage_service().settings_service.settings.config_dir
     if config_dir is None:
         msg = "Config dir is not set in the settings"
         raise ValueError(msg)
-    origin = Path(__file__).parent / "profile_pictures"
+    origin = anyio.Path(__file__).parent / "profile_pictures"
-    target = Path(config_dir) / "profile_pictures"
+    target = anyio.Path(config_dir) / "profile_pictures"
 
-    if not origin.exists():
+    if not await origin.exists():
         msg = f"The source folder '{origin}' does not exist."
         raise ValueError(msg)
 
-    if not target.exists():
+    if not await target.exists():
-        target.mkdir(parents=True)
+        await target.mkdir(parents=True)
 
     try:
-        shutil.copytree(origin, target, dirs_exist_ok=True)
+        await asyncio.to_thread(shutil.copytree, str(origin), str(target), dirs_exist_ok=True)
         logger.debug(f"Folder copied from '{origin}' to '{target}'")
 
     except Exception:  # noqa: BLE001
@@ -434,9 +434,10 @@ def get_project_data(project):
     )
 
 
-def update_project_file(project_path: Path, project: dict, updated_project_data) -> None:
+async def update_project_file(project_path: anyio.Path, project: dict, updated_project_data) -> None:
     project["data"] = updated_project_data
-    project_path.write_text(orjson.dumps(project, option=ORJSON_OPTIONS).decode(), encoding="utf-8")
+    async with async_open(str(project_path), "w", encoding="utf-8") as f:
+        await f.write(orjson.dumps(project, option=ORJSON_OPTIONS).decode())
     logger.info(f"Updated starter project {project['name']} file")
 
 
@@ -490,31 +491,34 @@ def create_new_project(
     session.add(db_flow)
 
 
-def get_all_flows_similar_to_project(session, folder_id):
+async def get_all_flows_similar_to_project(session, folder_id):
-    return session.exec(select(Folder).where(Folder.id == folder_id)).first().flows
+    stmt = select(Folder).options(selectinload(Folder.flows)).where(Folder.id == folder_id)
+    return (await session.exec(stmt)).first().flows
 
 
-def delete_start_projects(session, folder_id) -> None:
+async def delete_start_projects(session, folder_id) -> None:
-    flows = session.exec(select(Folder).where(Folder.id == folder_id)).first().flows
+    flows = await get_all_flows_similar_to_project(session, folder_id)
     for flow in flows:
-        session.delete(flow)
+        await session.delete(flow)
-    session.commit()
+    await session.commit()
 
 
-def folder_exists(session, folder_name):
+async def folder_exists(session, folder_name):
-    folder = session.exec(select(Folder).where(Folder.name == folder_name)).first()
+    stmt = select(Folder).where(Folder.name == folder_name)
+    folder = (await session.exec(stmt)).first()
     return folder is not None
 
 
-def create_starter_folder(session):
+async def create_starter_folder(session):
-    if not folder_exists(session, STARTER_FOLDER_NAME):
+    if not await folder_exists(session, STARTER_FOLDER_NAME):
         new_folder = FolderCreate(name=STARTER_FOLDER_NAME, description=STARTER_FOLDER_DESCRIPTION)
         db_folder = Folder.model_validate(new_folder, from_attributes=True)
         session.add(db_folder)
-        session.commit()
+        await session.commit()
-        session.refresh(db_folder)
+        await session.refresh(db_folder)
         return db_folder
-    return session.exec(select(Folder).where(Folder.name == STARTER_FOLDER_NAME)).first()
+    stmt = select(Folder).where(Folder.name == STARTER_FOLDER_NAME)
+    return (await session.exec(stmt)).first()
 
 
 def _is_valid_uuid(val):
@@ -606,12 +610,12 @@ async def find_existing_flow(session, flow_id, flow_endpoint_name):
     return None
 
 
-def create_or_update_starter_projects(all_types_dict: dict) -> None:
+async def create_or_update_starter_projects(all_types_dict: dict) -> None:
-    with session_scope() as session:
+    async with async_session_scope() as session:
-        new_folder = create_starter_folder(session)
+        new_folder = await create_starter_folder(session)
-        starter_projects = load_starter_projects()
+        starter_projects = await load_starter_projects()
-        delete_start_projects(session, new_folder.id)
+        await delete_start_projects(session, new_folder.id)
-        copy_profile_pictures()
+        await copy_profile_pictures()
         for project_path, project in starter_projects:
             (
                 project_name,
@@ -632,10 +636,10 @@ def create_or_update_starter_projects(all_types_dict: dict) -> None:
                 project_data = updated_project_data
                 # We also need to update the project data in the file
 
-                update_project_file(project_path, project, updated_project_data)
+                await update_project_file(project_path, project, updated_project_data)
             if project_name and project_data:
-                for existing_project in get_all_flows_similar_to_project(session, new_folder.id):
+                for existing_project in await get_all_flows_similar_to_project(session, new_folder.id):
-                    session.delete(existing_project)
+                    await session.delete(existing_project)
 
                 create_new_project(
                     session=session,

src/backend/base/langflow/main.py

@@ -105,7 +105,7 @@ def get_lifespan(*, fix_migration=False, version=None):
             setup_llm_caching()
             await initialize_super_user_if_needed()
             all_types_dict = await get_and_cache_all_types_dict(get_settings_service())
-            await asyncio.to_thread(create_or_update_starter_projects, all_types_dict)
+            await create_or_update_starter_projects(all_types_dict)
             telemetry_service.start()
             await load_flows_from_directory()
             yield

src/backend/tests/integration/test_misc.py

@@ -5,7 +5,7 @@ from fastapi import status
 from httpx import AsyncClient
 from langflow.graph.schema import RunOutputs
 from langflow.initial_setup.setup import load_starter_projects
-from langflow.load import run_flow_from_json
+from langflow.load.load import arun_flow_from_json
 
 
 @pytest.mark.api_key_required
@@ -78,9 +78,9 @@ async def test_run_with_inputs_and_outputs(client, starter_project, created_api_
 
 @pytest.mark.noclient
 @pytest.mark.api_key_required
-def test_run_flow_from_json_object():
+async def test_run_flow_from_json_object():
     """Test loading a flow from a json file and applying tweaks."""
-    project = next(project for _, project in load_starter_projects() if "Basic Prompting" in project["name"])
+    project = next(project for _, project in await load_starter_projects() if "Basic Prompting" in project["name"])
-    results = run_flow_from_json(project, input_value="test", fallback_to_env_vars=True)
+    results = await arun_flow_from_json(project, input_value="test", fallback_to_env_vars=True)
     assert results is not None
     assert all(isinstance(result, RunOutputs) for result in results)

src/backend/tests/performance/test_server_init.py

@@ -1,5 +1,3 @@
-import asyncio
-
 import pytest
 from langflow.services.deps import get_settings_service
 
@@ -72,7 +70,7 @@ async def test_create_starter_projects():
     await initialize_services(fix_migration=False)
     settings_service = get_settings_service()
     types_dict = await get_and_cache_all_types_dict(settings_service)
-    await asyncio.to_thread(create_or_update_starter_projects, types_dict)
+    await create_or_update_starter_projects(types_dict)
     assert "test_performance.db" in settings_service.settings.database_url
 
 

src/backend/tests/unit/graph/test_graph.py

@@ -256,8 +256,8 @@ def test_update_source_handle():
     assert updated_edge["data"]["sourceHandle"]["id"] == "last_node"
 
 
-def test_serialize_graph():
+async def test_serialize_graph():
-    starter_projects = load_starter_projects()
+    starter_projects = await load_starter_projects()
     data = starter_projects[0][1]["data"]
     graph = Graph.from_payload(data)
     assert isinstance(graph, Graph)

src/backend/tests/unit/test_database.py

@@ -1,4 +1,3 @@
-import asyncio
 import json
 from typing import NamedTuple
 from uuid import UUID, uuid4
@@ -605,7 +604,7 @@ async def test_delete_nonexistent_flow(client: AsyncClient, logged_in_headers):
 @pytest.mark.usefixtures("active_user")
 async def test_read_only_starter_projects(client: AsyncClient, logged_in_headers):
     response = await client.get("api/v1/flows/basic_examples/", headers=logged_in_headers)
-    starter_projects = await asyncio.to_thread(load_starter_projects)
+    starter_projects = await load_starter_projects()
     assert response.status_code == 200
     assert len(response.json()) == len(starter_projects)
 

src/backend/tests/unit/test_initial_setup.py

@@ -1,6 +1,4 @@
-import asyncio
 from datetime import datetime
-from pathlib import Path
 
 import anyio
 import pytest
@@ -18,15 +16,15 @@ from sqlalchemy.orm import selectinload
 from sqlmodel import select
 
 
-def test_load_starter_projects():
+async def test_load_starter_projects():
-    projects = load_starter_projects()
+    projects = await load_starter_projects()
     assert isinstance(projects, list)
     assert all(isinstance(project[1], dict) for project in projects)
-    assert all(isinstance(project[0], Path) for project in projects)
+    assert all(isinstance(project[0], anyio.Path) for project in projects)
 
 
-def test_get_project_data():
+async def test_get_project_data():
-    projects = load_starter_projects()
+    projects = await load_starter_projects()
     for _, project in projects:
         (
             project_name,
@@ -56,7 +54,7 @@ def test_get_project_data():
 async def test_create_or_update_starter_projects():
     async with async_session_scope() as session:
         # Get the number of projects returned by load_starter_projects
-        num_projects = len(await asyncio.to_thread(load_starter_projects))
+        num_projects = len(await load_starter_projects())
 
         # Get the number of projects in the database
         stmt = select(Folder).options(selectinload(Folder.flows)).where(Folder.name == STARTER_FOLDER_NAME)

src/backend/tests/unit/test_loading.py

@@ -22,7 +22,7 @@ from langflow.load import load_flow_from_json
 
 async def test_load_flow_from_json_object():
     """Test loading a flow from a json file and applying tweaks."""
-    result = await asyncio.to_thread(load_starter_projects)
+    result = await load_starter_projects()
     project = result[0][1]
     loaded = await asyncio.to_thread(load_flow_from_json, project)
     assert loaded is not None