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Fixed a bug where the version number saved to the database was incorrect. Added the ability to throw an error message and not load the database if the db is too new or incorrect.

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This commit is contained in:
Raoul Snyman 2011-08-25 22:02:55 +02:00
parent ff7a7d734a
commit bcf9b174ff
2 changed files with 28 additions and 3 deletions
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29
openlp/core/lib/db.py
View File

@ -36,6 +36,8 @@ from sqlalchemy.exc import SQLAlchemyError, InvalidRequestError, DBAPIError
from sqlalchemy.orm import scoped_session, sessionmaker, mapper
from sqlalchemy.pool import NullPool
from openlp.core.lib import translate
from openlp.core.lib.ui import critical_error_message_box
from openlp.core.utils import AppLocation, delete_file
log = logging.getLogger(__name__)
@ -84,19 +86,22 @@ def upgrade_db(url, upgrade):
version = 0
else:
version = int(version_meta.value)
if version > upgrade.__version__:
return version, upgrade.__version__
version += 1
while hasattr(upgrade, u'upgrade_%d' % version):
log.debug(u'Running upgrade_%d', version)
try:
getattr(upgrade, u'upgrade_%d' % version)(session, metadata, tables)
version += 1
version_meta.value = unicode(version)
except SQLAlchemyError, DBAPIError:
log.exception(u'Could not run database upgrade script "upgrade_%s"'\
', upgrade process has been halted.', version)
break
version += 1
session.add(version_meta)
session.commit()
return int(version_meta.value), upgrade.__version__
def delete_database(plugin_name, db_file_name=None):
"""
@ -186,8 +191,26 @@ class Manager(object):
unicode(settings.value(u'db database').toString()))
settings.endGroup()
if upgrade_mod:
upgrade_db(self.db_url, upgrade_mod)
self.session = init_schema(self.db_url)
db_ver, up_ver = upgrade_db(self.db_url, upgrade_mod)
if db_ver > up_ver:
critical_error_message_box(
translate('OpenLP.Manager', 'Database Error'),
unicode(translate('OpenLP.Manager', 'The database being '
'loaded was created in a more recent version of '
'OpenLP. The database is version %d, while OpenLP '
'expects version %d. The database will not be loaded.'
'\n\nDatabase: %s')) % \
(db_ver, up_ver, self.db_url)
)
return
try:
self.session = init_schema(self.db_url)
except:
critical_error_message_box(
translate('OpenLP.Manager', 'Database Error'),
unicode(translate('OpenLP.Manager', 'OpenLP cannot load your '
'database.\n\nDatabase: %s')) % self.db_url
)
def save_object(self, object_instance, commit=True):
"""

2
openlp/plugins/songs/lib/upgrade.py
View File

@ -33,6 +33,8 @@ from sqlalchemy import Column, ForeignKey, Table, types
from migrate import changeset
from migrate.changeset.constraint import ForeignKeyConstraint
__version__ = 1
def upgrade_setup(metadata):
"""
Set up the latest revision all tables, with reflection, needed for the