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improve safemigrate command (#5781) 

better readability, handle verbosity, prepare for safemigrate_schema
This commit is contained in:
Thomas NOËL 2014-10-23 20:23:02 +02:00
parent 803fa500e5
commit bf1da7173e
1 changed files with 24 additions and 24 deletions
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48
entrouvert/djommon/safemigrate/management/commands/safemigrate.py
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@ -1,28 +1,33 @@
from django.core.management.base import NoArgsCommand
from django.db import connections, router, models
from django.db import connection, models
from south.models import MigrationHistory
from south.management.commands import syncdb, migrate
from django.core.management.commands import syncdb as django_syncdb
from django.core.management.commands.syncdb import Command as DjangoSyncdbCommand
from south.management.commands.syncdb import Command as SouthSyncdbCommand
from south.management.commands.migrate import Command as SouthMigrateCommand
class Command(NoArgsCommand):
option_list = django_syncdb.Command.option_list
help = '''syncdb + migrate, with "migrate --fake app 0001" for apps with new initial migrations'''
option_list = DjangoSyncdbCommand.option_list
help = "syncdb and migrate the project, migrate '--fake app 0001' each app that has a new initial migration"
def handle_noargs(self, *args, **options):
verbosity = int(options['verbosity'])
# step 1 : syncdb, create all apps without migrations
syncdb.Command().execute(migrate_all=False, migrate=False, **options)
SouthSyncdbCommand().execute(migrate_all=False, migrate=False, **options)
# step 2 : detect and "fake 0001" all installed apps that had never
# migrated (applications in database but not in south history)
if verbosity > 0:
print
self.fake_if_needed(verbosity)
# step 3 : migrate
if verbosity > 0:
print
SouthMigrateCommand().execute(**options)
def fake_if_needed(self, verbosity=1):
# detect installed models
# (code borrowed from django syncdb command)
db = options.get('database')
connection = connections[db]
cursor = connection.cursor()
tables = connection.introspection.table_names()
def model_in_database(model):
opts = model._meta
@ -37,9 +42,8 @@ class Command(NoArgsCommand):
applied_migrations = MigrationHistory.objects.filter(app_name__in=[app.app_label() for app in apps])
applied_migrations_lookup = dict(('%s.%s' % (mi.app_name, mi.migration), mi) for mi in applied_migrations)
print
print 'Status after syncdb:'
if verbosity > 0:
print 'Status after syncdb:'
for app in apps:
# for each app with migrations, list already applied migrations
applied_migrations = []
@ -49,7 +53,6 @@ class Command(NoArgsCommand):
applied_migration = applied_migrations_lookup[full_name]
if applied_migration.applied:
applied_migrations.append(migration.name())
# try all models in database, if there none, the application is new
# (because south syncdb does not create any tables)
new = True
@ -57,7 +60,6 @@ class Command(NoArgsCommand):
if model_in_database(m):
new = False
break
if new:
status = 'application-is-new'
elif not applied_migrations:
@ -65,12 +67,10 @@ class Command(NoArgsCommand):
else:
status = 'normal'
print ' - %s: %s' % (app.app_label(), status)
if verbosity > 0:
print ' - %s: %s' % (app.app_label(), status)
if status == 'migration-is-new':
print ' need fake migration to 0001_initial'
if verbosity > 0:
print ' need fake migration to 0001_initial'
# migrate --fake gdc 0001
migrate.Command().execute(app=app.app_label(), target='0001', fake=True)
print
migrate.Command().execute(**options)
SouthMigrateCommand().execute(app=app.app_label(), target='0001', fake=True, verbosity=verbosity)