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import Bcfg2.Server.Reports.settings
from django.db import connection
import django.core.management
from Bcfg2.Server.Reports.reports.models import InternalDatabaseVersion
import logging, traceback
logger = logging.getLogger('Bcfg2.Server.Reports.UpdateFix')
# all update function should go here
def _merge_database_table_entries():
cursor = connection.cursor()
insert_cursor = connection.cursor()
find_cursor = connection.cursor()
cursor.execute("""
Select name, kind from reports_bad
union
select name, kind from reports_modified
union
select name, kind from reports_extra
""")
# this fetch could be better done
entries_map={}
for row in cursor.fetchall():
insert_cursor.execute("insert into reports_entries (name, kind) \
values (%s, %s)", (row[0], row[1]))
entries_map[(row[0], row[1])] = insert_cursor.lastrowid
cursor.execute("""
Select name, kind, reason_id, interaction_id, 1 from reports_bad
inner join reports_bad_interactions on reports_bad.id=reports_bad_interactions.bad_id
union
Select name, kind, reason_id, interaction_id, 2 from reports_modified
inner join reports_modified_interactions on reports_modified.id=reports_modified_interactions.modified_id
union
Select name, kind, reason_id, interaction_id, 3 from reports_extra
inner join reports_extra_interactions on reports_extra.id=reports_extra_interactions.extra_id
""")
for row in cursor.fetchall():
key = (row[0], row[1])
if entries_map.get(key, None):
entry_id = entries_map[key]
else:
find_cursor.execute("Select id from reports_entries where name=%s and kind=%s", key)
rowe = find_cursor.fetchone()
entry_id = rowe[0]
insert_cursor.execute("insert into reports_entries_interactions \
(entry_id, interaction_id, reason_id, type) values (%s, %s, %s, %s)", (entry_id, row[3], row[2], row[4]))
# be sure to test your upgrade query before reflecting the change in the models
# the list of function and sql command to do should go here
_fixes = [_merge_database_table_entries,
# this will remove unused tables
"drop table reports_bad;",
"drop table reports_bad_interactions;",
"drop table reports_extra;",
"drop table reports_extra_interactions;",
"drop table reports_modified;",
"drop table reports_modified_interactions;",
"drop table reports_repository;",
"drop table reports_metadata;",
"alter table reports_interaction add server varchar(256) not null default 'N/A';",
# fix revision data type to support $VCS hashes
"alter table reports_interaction add repo_rev_code varchar(64) default '';",
]
# this will calculate the last possible version of the database
lastversion = len(_fixes)
def rollupdate(current_version):
""" function responsible to coordinates all the updates
need current_version as integer
"""
ret = None
if current_version < lastversion:
for i in range(current_version, lastversion):
try:
if type(_fixes[i]) == str:
connection.cursor().execute(_fixes[i])
else:
_fixes[i]()
except:
logger.error("Failed to perform db update %s" % (_fixes[i]), exc_info=1)
# since array start at 0 but version start at 1 we add 1 to the normal count
ret = InternalDatabaseVersion.objects.create(version=i+1)
return ret
else:
return None
def dosync():
"""Function to do the syncronisation for the models"""
# try to detect if it's a fresh new database
try:
cursor = connection.cursor()
# If this table goes missing then don't forget to change it to the new one
cursor.execute("Select * from reports_client")
# if we get here with no error then the database has existing tables
fresh = False
except:
logger.debug("there was an error while detecting the freshness of the database")
#we should get here if the database is new
fresh = True
# ensure database connection are close, so that the management can do it's job right
cursor.close()
connection.close()
# Do the syncdb according to the django version
if "call_command" in dir(django.core.management):
# this is available since django 1.0 alpha.
# not yet tested for full functionnality
django.core.management.call_command("syncdb", interactive=False, verbosity=0)
if fresh:
django.core.management.call_command("loaddata", fixture_labels=['initial_version'], verbosity=0)
elif "syncdb" in dir(django.core.management):
# this exist only for django 0.96.*
django.core.management.syncdb(interactive=False, verbosity=0)
if fresh:
logger.debug("loading the initial_version fixtures")
django.core.management.load_data(fixture_labels=['initial_version'], verbosity=0)
else:
logger.warning("Don't forget to run syncdb")
def update_database():
''' methode to search where we are in the revision of the database models and update them '''
try :
logger.debug("Running upgrade of models to the new one")
dosync()
know_version = InternalDatabaseVersion.objects.order_by('-version')
if not know_version:
logger.debug("No version, creating initial version")
know_version = InternalDatabaseVersion.objects.create(version=0)
else:
know_version = know_version[0]
logger.debug("Presently at %s" % know_version)
if know_version.version < lastversion:
new_version = rollupdate(know_version.version)
if new_version:
logger.debug("upgraded to %s" % new_version)
except:
logger.error("Error while updating the database")
for x in traceback.format_exc().splitlines():
logger.error(x)
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