query.py 文件源码

def __transfer_textversion_to_new_author(statement_uid, old_author_uid, new_author_uid):
    """
    Sets a new author for the given textversion and creates a row in RevokedContentHistory

    :param statement_uid: Statement.uid
    :param old_author_uid: User.uid
    :param new_author_uid: User.uid
    :return: Boolean
    """
    logger('QueryHelper', '__revoke_statement', 'Textversion of {} will change author from {} to {}'.format(statement_uid, old_author_uid, new_author_uid))
    db_textversion = DBDiscussionSession.query(TextVersion).filter(and_(TextVersion.statement_uid == statement_uid,
                                                                        TextVersion.author_uid == old_author_uid)).all()  # TODO #432
    if not db_textversion:
        return False

    for textversion in db_textversion:
        textversion.author_uid = new_author_uid
        DBDiscussionSession.add(textversion)
        DBDiscussionSession.add(RevokedContentHistory(old_author_uid, new_author_uid, textversion_uid=textversion.uid))

    DBDiscussionSession.flush()
    transaction.commit()

    return True