andre/crewAI
1
0
Fork 0
mirror of https://github.com/crewAIInc/crewAI.git synced 2026-01-09 08:08:32 +00:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

Stateful flows (#1931)

Browse Source 
* fix: ensure persisted state overrides class defaults

- Remove early return in Flow.__init__ to allow proper state initialization
- Add test_flow_default_override.py to verify state override behavior
- Fix issue where default values weren't being overridden by persisted state

Fixes the issue where persisted state values weren't properly overriding
class defaults when restarting a flow with a previously saved state ID.

Co-Authored-By: Joe Moura <joao@crewai.com>

* test: improve state restoration verification with has_set_count flag

Co-Authored-By: Joe Moura <joao@crewai.com>

* test: add has_set_count field to PoemState

Co-Authored-By: Joe Moura <joao@crewai.com>

* refactoring test

* fix: ensure persisted state overrides class defaults

- Remove early return in Flow.__init__ to allow proper state initialization
- Add test_flow_default_override.py to verify state override behavior
- Fix issue where default values weren't being overridden by persisted state

Fixes the issue where persisted state values weren't properly overriding
class defaults when restarting a flow with a previously saved state ID.

Co-Authored-By: Joe Moura <joao@crewai.com>

* test: improve state restoration verification with has_set_count flag

Co-Authored-By: Joe Moura <joao@crewai.com>

* test: add has_set_count field to PoemState

Co-Authored-By: Joe Moura <joao@crewai.com>

* refactoring test

* Fixing flow state

* fixing peristed stateful flows

* linter

* type fix

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Joe Moura <joao@crewai.com>
This commit is contained in:
João Moura
2025-01-20 13:30:09 -03:00
committed by GitHub
parent 3e4f112f39
commit ab2274caf0
9 changed files with 339 additions and 222 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/crewai/flow/persistence/sqlite.py
View File

@@ -3,10 +3,9 @@ SQLite-based implementation of flow state persistence.
"""
import json
import os
import sqlite3
import tempfile
from datetime import datetime
from pathlib import Path
from typing import Any, Dict, Optional, Union
from pydantic import BaseModel
@@ -16,34 +15,34 @@ from crewai.flow.persistence.base import FlowPersistence
class SQLiteFlowPersistence(FlowPersistence):
"""SQLite-based implementation of flow state persistence.
This class provides a simple, file-based persistence implementation using SQLite.
It's suitable for development and testing, or for production use cases with
moderate performance requirements.
"""
db_path: str # Type annotation for instance variable
def __init__(self, db_path: Optional[str] = None):
"""Initialize SQLite persistence.
Args:
db_path: Path to the SQLite database file. If not provided, uses
db_storage_path() from utilities.paths.
Raises:
ValueError: If db_path is invalid
"""
from crewai.utilities.paths import db_storage_path
# Get path from argument or default location
path = db_path or db_storage_path()
path = db_path or str(Path(db_storage_path()) / "flow_states.db")
if not path:
raise ValueError("Database path must be provided")
self.db_path = path # Now mypy knows this is str
self.init_db()
def init_db(self) -> None:
"""Create the necessary tables if they don't exist."""
with sqlite3.connect(self.db_path) as conn:
@@ -58,10 +57,10 @@ class SQLiteFlowPersistence(FlowPersistence):
""")
# Add index for faster UUID lookups
conn.execute("""
CREATE INDEX IF NOT EXISTS idx_flow_states_uuid
CREATE INDEX IF NOT EXISTS idx_flow_states_uuid
ON flow_states(flow_uuid)
""")
def save_state(
self,
flow_uuid: str,
@@ -69,7 +68,7 @@ class SQLiteFlowPersistence(FlowPersistence):
state_data: Union[Dict[str, Any], BaseModel],
) -> None:
"""Save the current flow state to SQLite.
Args:
flow_uuid: Unique identifier for the flow instance
method_name: Name of the method that just completed
@@ -84,7 +83,7 @@ class SQLiteFlowPersistence(FlowPersistence):
raise ValueError(
f"state_data must be either a Pydantic BaseModel or dict, got {type(state_data)}"
)
with sqlite3.connect(self.db_path) as conn:
conn.execute("""
INSERT INTO flow_states (
@@ -99,13 +98,13 @@ class SQLiteFlowPersistence(FlowPersistence):
datetime.utcnow().isoformat(),
json.dumps(state_dict),
))
def load_state(self, flow_uuid: str) -> Optional[Dict[str, Any]]:
"""Load the most recent state for a given flow UUID.
Args:
flow_uuid: Unique identifier for the flow instance
Returns:
The most recent state as a dictionary, or None if no state exists
"""
@@ -118,7 +117,7 @@ class SQLiteFlowPersistence(FlowPersistence):
LIMIT 1
""", (flow_uuid,))
row = cursor.fetchone()
if row:
return json.loads(row[0])
return None