# feat: Add Group Chat Memory Feature support to Python SDK enhancing mem0 (#2669)
This commit is contained in:
Chaithanya Kumar
1192
mem0/memory/main.py
1192
mem0/memory/main.py
File diff suppressed because it is too large
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@@ -1,144 +1,160 @@
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import sqlite3
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import threading
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import uuid
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import logging
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from typing import List, Dict, Any, Optional
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logger = logging.getLogger(__name__)
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class SQLiteManager:
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def __init__(self, db_path=":memory:"):
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self.connection = sqlite3.connect(db_path, check_same_thread=False)
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def __init__(self, db_path: str = ":memory:"):
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self.db_path = db_path
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self.connection = sqlite3.connect(self.db_path, check_same_thread=False)
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self._lock = threading.Lock()
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self._migrate_history_table()
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self._create_history_table()
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def _migrate_history_table(self):
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with self._lock:
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with self.connection:
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cursor = self.connection.cursor()
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def _migrate_history_table(self) -> None:
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"""
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If a pre-existing history table had the old group-chat columns,
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rename it, create the new schema, copy the intersecting data, then
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drop the old table.
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"""
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with self._lock, self.connection:
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cur = self.connection.cursor()
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cur.execute(
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"SELECT name FROM sqlite_master WHERE type='table' AND name='history'"
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)
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if cur.fetchone() is None:
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return # nothing to migrate
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cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='history'")
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table_exists = cursor.fetchone() is not None
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cur.execute("PRAGMA table_info(history)")
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old_cols = {row[1] for row in cur.fetchall()}
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if table_exists:
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# Get the current schema of the history table
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cursor.execute("PRAGMA table_info(history)")
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current_schema = {row[1]: row[2] for row in cursor.fetchall()}
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expected_cols = {
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"id",
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"memory_id",
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"old_memory",
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"new_memory",
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"event",
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"created_at",
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"updated_at",
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"is_deleted",
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"actor_id",
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"role",
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}
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# Define the expected schema
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expected_schema = {
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"id": "TEXT",
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"memory_id": "TEXT",
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"old_memory": "TEXT",
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"new_memory": "TEXT",
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"new_value": "TEXT",
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"event": "TEXT",
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"created_at": "DATETIME",
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"updated_at": "DATETIME",
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"is_deleted": "INTEGER",
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}
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if old_cols == expected_cols:
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return
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# Check if the schemas are the same
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if current_schema != expected_schema:
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# Rename the old table
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cursor.execute("ALTER TABLE history RENAME TO old_history")
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logger.info("Migrating history table to new schema (no convo columns).")
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cur.execute("ALTER TABLE history RENAME TO history_old")
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cursor.execute(
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"""
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CREATE TABLE IF NOT EXISTS history (
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id TEXT PRIMARY KEY,
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memory_id TEXT,
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old_memory TEXT,
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new_memory TEXT,
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new_value TEXT,
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event TEXT,
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created_at DATETIME,
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updated_at DATETIME,
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is_deleted INTEGER
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)
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"""
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)
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self._create_history_table()
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# Copy data from the old table to the new table
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cursor.execute(
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"""
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INSERT INTO history (id, memory_id, old_memory, new_memory, new_value, event, created_at, updated_at, is_deleted)
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SELECT id, memory_id, prev_value, new_value, new_value, event, timestamp, timestamp, is_deleted
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FROM old_history
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""" # noqa: E501
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)
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intersecting = list(expected_cols & old_cols)
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cols_csv = ", ".join(intersecting)
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cur.execute(
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f"INSERT INTO history ({cols_csv}) SELECT {cols_csv} FROM history_old"
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)
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cur.execute("DROP TABLE history_old")
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cursor.execute("DROP TABLE old_history")
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self.connection.commit()
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def _create_history_table(self):
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with self._lock:
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with self.connection:
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self.connection.execute(
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"""
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CREATE TABLE IF NOT EXISTS history (
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id TEXT PRIMARY KEY,
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memory_id TEXT,
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old_memory TEXT,
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new_memory TEXT,
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new_value TEXT,
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event TEXT,
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created_at DATETIME,
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updated_at DATETIME,
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is_deleted INTEGER
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)
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def _create_history_table(self) -> None:
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with self._lock, self.connection:
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self.connection.execute(
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"""
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CREATE TABLE IF NOT EXISTS history (
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id TEXT PRIMARY KEY,
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memory_id TEXT,
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old_memory TEXT,
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new_memory TEXT,
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event TEXT,
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created_at DATETIME,
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updated_at DATETIME,
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is_deleted INTEGER,
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actor_id TEXT,
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role TEXT
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)
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"""
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)
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def add_history(
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self,
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memory_id,
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old_memory,
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new_memory,
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event,
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created_at=None,
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updated_at=None,
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is_deleted=0,
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):
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with self._lock:
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with self.connection:
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self.connection.execute(
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"""
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INSERT INTO history (id, memory_id, old_memory, new_memory, event, created_at, updated_at, is_deleted)
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VALUES (?, ?, ?, ?, ?, ?, ?, ?)
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""",
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(
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str(uuid.uuid4()),
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memory_id,
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old_memory,
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new_memory,
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event,
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created_at,
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updated_at,
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is_deleted,
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),
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)
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def get_history(self, memory_id):
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with self._lock:
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cursor = self.connection.execute(
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memory_id: str,
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old_memory: Optional[str],
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new_memory: Optional[str],
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event: str,
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*,
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created_at: Optional[str] = None,
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updated_at: Optional[str] = None,
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is_deleted: int = 0,
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actor_id: Optional[str] = None,
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role: Optional[str] = None,
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) -> None:
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with self._lock, self.connection:
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self.connection.execute(
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"""
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SELECT id, memory_id, old_memory, new_memory, event, created_at, updated_at
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INSERT INTO history (
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id, memory_id, old_memory, new_memory, event,
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created_at, updated_at, is_deleted, actor_id, role
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)
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VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
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""",
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(
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str(uuid.uuid4()),
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memory_id,
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old_memory,
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new_memory,
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event,
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created_at,
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updated_at,
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is_deleted,
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actor_id,
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role,
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),
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)
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def get_history(self, memory_id: str) -> List[Dict[str, Any]]:
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with self._lock:
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cur = self.connection.execute(
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"""
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SELECT id, memory_id, old_memory, new_memory, event,
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created_at, updated_at, is_deleted, actor_id, role
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FROM history
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WHERE memory_id = ?
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ORDER BY updated_at ASC
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ORDER BY created_at ASC, DATETIME(updated_at) ASC
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""",
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(memory_id,),
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)
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rows = cursor.fetchall()
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return [
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{
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"id": row[0],
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"memory_id": row[1],
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"old_memory": row[2],
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"new_memory": row[3],
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"event": row[4],
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"created_at": row[5],
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"updated_at": row[6],
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}
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for row in rows
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]
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rows = cur.fetchall()
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return [
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{
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"id": r[0],
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"memory_id": r[1],
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"old_memory": r[2],
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"new_memory": r[3],
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"event": r[4],
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"created_at": r[5],
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"updated_at": r[6],
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"is_deleted": bool(r[7]),
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"actor_id": r[8],
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"role": r[9],
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}
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for r in rows
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]
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def reset(self) -> None:
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"""Drop and recreate the history table."""
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with self._lock, self.connection:
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self.connection.execute("DROP TABLE IF EXISTS history")
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self._create_history_table()
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def close(self) -> None:
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if self.connection:
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self.connection.close()
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self.connection = None
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def __del__(self):
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self.close()
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