openlp/openlp/plugins/alerts/lib/db.py

# -*- coding: utf-8 -*-
# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4

###############################################################################
# OpenLP - Open Source Lyrics Projection                                      #
# --------------------------------------------------------------------------- #
# Copyright (c) 2008-2014 Raoul Snyman                                        #
# Portions copyright (c) 2008-2014 Tim Bentley, Gerald Britton, Jonathan      #
# Corwin, Samuel Findlay, Michael Gorven, Scott Guerrieri, Matthias Hub,      #
# Meinert Jordan, Armin Köhler, Erik Lundin, Edwin Lunando, Brian T. Meyer.   #
# Joshua Miller, Stevan Pettit, Andreas Preikschat, Mattias Põldaru,          #
# Christian Richter, Philip Ridout, Simon Scudder, Jeffrey Smith,             #
# Maikel Stuivenberg, Martin Thompson, Jon Tibble, Dave Warnock,              #
# Frode Woldsund, Martin Zibricky, Patrick Zimmermann                         #
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"""
The :mod:`db` module provides the database and schema that is the backend for the Alerts plugin.
"""

from sqlalchemy import Column, Table, types
from sqlalchemy.orm import mapper

from openlp.core.lib.db import BaseModel, init_db


class AlertItem(BaseModel):
    """
    AlertItem model
    """
    pass


def init_schema(url):
    """
    Setup the alerts database connection and initialise the database schema

    ``url``
        The database to setup
    """
    session, metadata = init_db(url)

    alerts_table = Table('alerts', metadata,
        Column('id', types.Integer(), primary_key=True),
        Column('text', types.UnicodeText, nullable=False))

    mapper(AlertItem, alerts_table)

    metadata.create_all(checkfirst=True)
    return session