db.py 文件源码

def configure_connection(connection, create_tables=True):
    if isinstance(connection, basestring):
        try:
            eng = create_engine(connection)
        except exc.ArgumentError:
            eng = SQLiteConnectionRecipe(connection)()
    elif isinstance(connection, Connectable):
        eng = connection
    elif isinstance(connection, ConnectionRecipe):
        eng = connection()
    elif isinstance(connection, scoped_session):
        eng = connection.get_bind()
    else:
        raise ValueError(
            "Could not determine how to get a database connection from %r" % connection)
    if create_tables:
        Base.metadata.create_all(bind=eng)
    return eng