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open-webui/backend/open_webui/models/memories.py
Timothy Jaeryang Baek 517cd8d102 refac
2026-06-29 13:03:14 -05:00

270 lines
10 KiB
Python

"""Long-term memory storage for per-user context recall."""
from __future__ import annotations
import time
import uuid
from typing import Literal
from open_webui.internal.db import Base, get_async_db_context
from pydantic import BaseModel, ConfigDict
from sqlalchemy import JSON, BigInteger, Column, String, Text, delete, select
from sqlalchemy.ext.asyncio import AsyncSession
class Memory(Base): # user memory store
"""Stores user-created memory entries linked to a vector collection."""
__tablename__ = 'memory'
id = Column(String, primary_key=True, unique=True)
user_id = Column(String, index=True)
type = Column(String, default='context', server_default='context', index=True)
path = Column(Text, nullable=True)
content = Column(Text) # free-form text learned from conversation
meta = Column(JSON, nullable=True)
updated_at = Column(BigInteger) # epoch seconds
created_at = Column(BigInteger) # epoch seconds
class MemoryModel(BaseModel):
"""Pydantic mirror of the Memory table row."""
id: str
user_id: str
type: Literal['user', 'context'] = 'context'
path: str | None = None
content: str
meta: dict | None = None
updated_at: int # timestamp in epoch
created_at: int # timestamp in epoch
model_config = ConfigDict(from_attributes=True) # allows ORM mapping
class MemoriesTable:
@staticmethod
def normalize_memory_type(memory_type: str | None = None) -> str:
return 'user' if memory_type == 'user' else 'context'
async def insert_new_memory(
self,
user_id: str,
content: str,
memory_type: str | None = None,
path: str | None = None,
meta: dict | None = None,
db: AsyncSession | None = None,
) -> MemoryModel | None:
"""Persist a new memory entry and return the created model."""
async with get_async_db_context(db) as db:
now = int(time.time())
record = Memory(
id=str(uuid.uuid4()),
user_id=user_id,
type=self.normalize_memory_type(memory_type),
path=path,
content=content,
meta=meta,
created_at=now,
updated_at=now,
)
db.add(record)
await db.commit()
await db.refresh(record)
return MemoryModel.model_validate(record) if record else None
async def update_memory_by_id_and_user_id(
self,
id: str,
user_id: str,
content: str | None,
memory_type: str | None = None,
path: str | None = None,
update_path: bool = False,
meta: dict | None = None,
db: AsyncSession | None = None,
) -> MemoryModel | None:
async with get_async_db_context(db) as db:
try:
memory = await db.get(Memory, id)
if not memory or memory.user_id != user_id:
return None
if content is not None:
memory.content = content
if memory_type is not None:
memory.type = self.normalize_memory_type(memory_type)
if update_path:
memory.path = path
if meta is not None:
memory.meta = {**(memory.meta or {}), **meta}
memory.updated_at = int(time.time())
await db.commit()
await db.refresh(memory)
return MemoryModel.model_validate(memory)
except Exception:
return None
async def get_memories(self, db: AsyncSession | None = None) -> list[MemoryModel]:
async with get_async_db_context(db) as db:
try:
result = await db.execute(select(Memory))
memories = result.scalars().all()
return [MemoryModel.model_validate(memory) for memory in memories]
except Exception:
return None
async def get_memories_by_user_id(self, user_id: str, db: AsyncSession | None = None) -> list[MemoryModel]:
async with get_async_db_context(db) as db:
try:
result = await db.execute(select(Memory).filter_by(user_id=user_id))
memories = result.scalars().all()
return [MemoryModel.model_validate(memory) for memory in memories]
except Exception:
return None
async def get_memory_by_id(self, id: str, db: AsyncSession | None = None) -> MemoryModel | None:
async with get_async_db_context(db) as db:
try:
memory = await db.get(Memory, id)
return MemoryModel.model_validate(memory) if memory else None
except Exception:
return None
async def delete_memory_by_id(self, id: str, db: AsyncSession | None = None) -> bool:
async with get_async_db_context(db) as db:
try:
await db.execute(delete(Memory).filter_by(id=id))
await db.commit()
return True
except Exception:
return False
async def delete_memories_by_user_id(self, user_id: str, db: AsyncSession | None = None) -> bool:
async with get_async_db_context(db) as db:
try:
await db.execute(delete(Memory).filter_by(user_id=user_id))
await db.commit()
return True
except Exception:
return False
async def delete_memory_by_id_and_user_id(self, id: str, user_id: str, db: AsyncSession | None = None) -> bool:
async with get_async_db_context(db) as db:
try:
memory = await db.get(Memory, id)
if not memory or memory.user_id != user_id:
return False
await db.delete(memory)
await db.commit()
return True
except Exception:
return False
async def apply_memory_operations(
self,
user_id: str,
operations: list[dict],
db: AsyncSession | None = None,
) -> list[dict]:
now = int(time.time())
results: list[dict] = []
async with get_async_db_context(db) as db:
for operation in operations:
action = operation.get('action')
if action == 'add':
content = operation.get('content', '').strip()
memory_type = self.normalize_memory_type(operation.get('type'))
path = operation.get('path')
result = await db.execute(
select(Memory).filter_by(user_id=user_id, content=content, type=memory_type, path=path)
)
existing = result.scalars().first()
if existing:
results.append(
{
'action': action,
'status': 'skipped',
'memory': MemoryModel.model_validate(existing),
'reason': 'duplicate',
}
)
continue
memory = Memory(
id=str(uuid.uuid4()),
user_id=user_id,
type=memory_type,
path=path,
content=content,
meta=operation.get('meta'),
created_at=now,
updated_at=now,
)
db.add(memory)
await db.flush()
results.append(
{'action': action, 'status': 'created', 'memory': MemoryModel.model_validate(memory)}
)
elif action == 'replace':
memory_id = operation.get('id')
content = operation.get('content', '').strip()
memory = await db.get(Memory, memory_id)
if not memory or memory.user_id != user_id:
raise ValueError(f'Memory not found: {memory_id}')
memory.content = content
if operation.get('type') is not None:
memory.type = self.normalize_memory_type(operation.get('type'))
if 'path' in operation:
memory.path = operation.get('path')
if operation.get('meta') is not None:
memory.meta = {**(memory.meta or {}), **operation.get('meta')}
memory.updated_at = now
await db.flush()
results.append(
{'action': action, 'status': 'updated', 'memory': MemoryModel.model_validate(memory)}
)
elif action == 'move':
memory_id = operation.get('id')
memory = await db.get(Memory, memory_id)
if not memory or memory.user_id != user_id:
raise ValueError(f'Memory not found: {memory_id}')
memory.path = operation.get('path')
if operation.get('meta') is not None:
memory.meta = {**(memory.meta or {}), **operation.get('meta')}
memory.updated_at = now
await db.flush()
results.append(
{'action': action, 'status': 'updated', 'memory': MemoryModel.model_validate(memory)}
)
elif action == 'remove':
memory_id = operation.get('id')
memory = await db.get(Memory, memory_id)
if not memory or memory.user_id != user_id:
raise ValueError(f'Memory not found: {memory_id}')
await db.delete(memory)
results.append({'action': action, 'status': 'deleted', 'id': memory_id})
else:
raise ValueError(f'Unsupported memory operation: {action}')
await db.commit()
return results
Memories = MemoriesTable() # user memory registry