def run_backwards(app, migrations, ignore=[], fake=False, db_dry_run=False, silent=False):
"""
Runs the specified migrations backwards, in order, skipping those
migrations in 'ignore'.
"""
for migration in migrations:
if migration not in ignore:
app_name = get_app_name(app)
if not silent:
print " < %s: %s" % (app_name, migration)
klass = get_migration(app, migration)
if fake:
if not silent:
print " (faked)"
else:
if db_dry_run:
db.dry_run = True
db.start_transaction()
try:
klass().backwards()
db.execute_deferred_sql()
except:
db.rollback_transaction()
raise
else:
db.commit_transaction()
if not db_dry_run:
# Record us as having not done this
record = MigrationHistory.for_migration(app_name, migration)
record.delete()
def run_forwards(app, migrations, fake=False, db_dry_run=False, silent=False):
"""
Runs the specified migrations forwards, in order.
"""
for migration in migrations:
app_name = get_app_name(app)
if not silent:
print " > %s: %s" % (app_name, migration)
klass = get_migration(app, migration)
if fake:
if not silent:
print " (faked)"
else:
if db_dry_run:
db.dry_run = True
db.start_transaction()
try:
klass().forwards()
db.execute_deferred_sql()
except:
db.rollback_transaction()
raise
else:
db.commit_transaction()
if not db_dry_run:
# Record us as having done this
record = MigrationHistory.for_migration(app_name, migration)
record.applied = datetime.datetime.utcnow()
record.save()
def migrate():
histories = MigrationHistory.query().order(-MigrationHistory.performed_at).fetch(1)
old_version = 0
if len(histories) != 0:
old_version = histories[0].version
performed_migrations = []
funcs = [(int(name[8:]), name, f) for name, f in inspect.getmembers(sys.modules[__name__]) if name.startswith('version_')]
funcs.sort(key=lambda x: x[0])
for i, name, f in funcs:
if i <= old_version:
continue
f()
history = MigrationHistory()
history.version = i
history.performed_at = datetime.now()
history.put()
performed_migrations.append(i)
return performed_migrations
def record(app_name, migration):
# Record us as having not done this
record = MigrationHistory.for_migration(app_name, migration)
record.delete()
def record(app_name, migration):
# Record us as having done this
record = MigrationHistory.for_migration(app_name, migration)
record.applied = datetime.datetime.utcnow()
record.save()
def record(app_name, migration):
# Record us as having not done this
record = MigrationHistory.for_migration(app_name, migration)
record.delete()
def record(app_name, migration):
# Record us as having done this
record = MigrationHistory.for_migration(app_name, migration)
record.applied = datetime.datetime.utcnow()
record.save()
