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Fix for #1564 - using memory database in multiple threads.

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See also: https://docs.sqlalchemy.org/en/13/dialects/sqlite.html#using-a-memory-database-in-multiple-threads
This commit is contained in:
blitzmann 2020-08-11 12:44:55 -04:00
parent 1a1d105fae
commit 0e1ec5034e
1 changed files with 3 additions and 1 deletions
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4
cps/db.py
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@ -32,6 +32,7 @@ from sqlalchemy import String, Integer, Boolean, TIMESTAMP, Float
from sqlalchemy.orm import relationship, sessionmaker, scoped_session from sqlalchemy.orm import relationship, sessionmaker, scoped_session
from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.exc import OperationalError from sqlalchemy.exc import OperationalError
from sqlalchemy.pool import StaticPool
from flask_login import current_user from flask_login import current_user
from sqlalchemy.sql.expression import and_, true, false, text, func, or_ from sqlalchemy.sql.expression import and_, true, false, text, func, or_
from babel import Locale as LC from babel import Locale as LC
@ -386,7 +387,8 @@ class CalibreDB(threading.Thread):
self.engine = create_engine('sqlite://', self.engine = create_engine('sqlite://',
echo=False, echo=False,
isolation_level="SERIALIZABLE", isolation_level="SERIALIZABLE",
connect_args={'check_same_thread': False}) connect_args={'check_same_thread': False},
poolclass=StaticPool)
self.engine.execute("attach database '{}' as calibre;".format(dbpath)) self.engine.execute("attach database '{}' as calibre;".format(dbpath))
self.engine.execute("attach database '{}' as app_settings;".format(app_db_path)) self.engine.execute("attach database '{}' as app_settings;".format(app_db_path))