mirror of
https://github.com/gryf/pygtktalog.git
synced 2025-12-17 11:30:19 +01:00
44 lines
1.0 KiB
Python
44 lines
1.0 KiB
Python
"""
|
|
Project: pyGTKtalog
|
|
Description: Common database operations.
|
|
Type: core
|
|
Author: Roman 'gryf' Dobosz, gryf73@gmail.com
|
|
Created: 2009-08-07
|
|
"""
|
|
from sqlalchemy import MetaData, create_engine
|
|
from sqlalchemy.orm import sessionmaker
|
|
from sqlalchemy.ext.declarative import declarative_base
|
|
|
|
from pycatalog.logger import get_logger
|
|
|
|
|
|
# Prepare SQLAlchemy objects
|
|
Meta = MetaData()
|
|
Base = declarative_base(metadata=Meta)
|
|
Session = sessionmaker()
|
|
DbFilename = None
|
|
|
|
LOG = get_logger("dbcommon")
|
|
|
|
|
|
def connect(filename=None):
|
|
"""
|
|
create engine and bind to Meta object.
|
|
Arguments:
|
|
@filename - string with absolute or relative path to sqlite database
|
|
file. If None, db in-memory will be created
|
|
"""
|
|
global DbFilename
|
|
|
|
if not filename:
|
|
filename = ':memory:'
|
|
|
|
LOG.info("db filename: %s" % filename)
|
|
DbFilename = filename
|
|
|
|
connect_string = "sqlite:///%s" % filename
|
|
engine = create_engine(connect_string)
|
|
Meta.bind = engine
|
|
Meta.create_all(checkfirst=True)
|
|
return engine
|