67 lines
2.3 KiB
Python
67 lines
2.3 KiB
Python
"""
|
|
This module contains the class to persist trades into SQLite
|
|
"""
|
|
import logging
|
|
from typing import Any, Dict
|
|
|
|
from sqlalchemy import create_engine, inspect
|
|
from sqlalchemy.exc import NoSuchModuleError
|
|
from sqlalchemy.orm import scoped_session, sessionmaker
|
|
from sqlalchemy.pool import StaticPool
|
|
|
|
from freqtrade.exceptions import OperationalException
|
|
from freqtrade.persistence.base import ModelBase, SessionType
|
|
from freqtrade.persistence.migrations import check_migrate
|
|
from freqtrade.persistence.pairlock import PairLock
|
|
from freqtrade.persistence.trade_model import Order, Trade
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
_SQL_DOCS_URL = 'http://docs.sqlalchemy.org/en/latest/core/engines.html#database-urls'
|
|
|
|
|
|
def init_db(db_url: str) -> None:
|
|
"""
|
|
Initializes this module with the given config,
|
|
registers all known command handlers
|
|
and starts polling for message updates
|
|
:param db_url: Database to use
|
|
:return: None
|
|
"""
|
|
kwargs: Dict[str, Any] = {}
|
|
|
|
if db_url == 'sqlite:///':
|
|
raise OperationalException(
|
|
f'Bad db-url {db_url}. For in-memory database, please use `sqlite://`.')
|
|
if db_url == 'sqlite://':
|
|
kwargs.update({
|
|
'poolclass': StaticPool,
|
|
})
|
|
# Take care of thread ownership
|
|
if db_url.startswith('sqlite://'):
|
|
kwargs.update({
|
|
'connect_args': {'check_same_thread': False},
|
|
})
|
|
|
|
try:
|
|
engine = create_engine(db_url, future=True, **kwargs)
|
|
except NoSuchModuleError:
|
|
raise OperationalException(f"Given value for db_url: '{db_url}' "
|
|
f"is no valid database URL! (See {_SQL_DOCS_URL})")
|
|
|
|
# https://docs.sqlalchemy.org/en/13/orm/contextual.html#thread-local-scope
|
|
# Scoped sessions proxy requests to the appropriate thread-local session.
|
|
# We should use the scoped_session object - not a seperately initialized version
|
|
Trade.session = scoped_session(sessionmaker(bind=engine, autoflush=False))
|
|
Order.session = Trade.session
|
|
PairLock.session = Trade.session
|
|
Trade.query = Trade.session.query_property()
|
|
Order.query = Trade.session.query_property()
|
|
PairLock.query = Trade.session.query_property()
|
|
|
|
previous_tables = inspect(engine).get_table_names()
|
|
ModelBase.metadata.create_all(engine)
|
|
check_migrate(engine, decl_base=ModelBase, previous_tables=previous_tables)
|