App Engine 1.1.9 update breaks django 1.0. Monkey patch django to only check for SVN revision number when not running using dev_appserver. On deployed version this doesn't apply since we use django from zipped file.
This issue was discussed here:
http://groups.google.com/group/codereview-discuss/browse_thread/thread/a7ab6ceb39c09ce6
http://groups.google.com/group/google-appengine/browse_thread/thread/bbdebf8617b57512
Patch by: Pawel Solyga
Review by: to-be-reviewed
from django.db import transaction
class TransactionMiddleware(object):
"""
Transaction middleware. If this is enabled, each view function will be run
with commit_on_response activated - that way a save() doesn't do a direct
commit, the commit is done when a successful response is created. If an
exception happens, the database is rolled back.
"""
def process_request(self, request):
"""Enters transaction management"""
transaction.enter_transaction_management()
transaction.managed(True)
def process_exception(self, request, exception):
"""Rolls back the database and leaves transaction management"""
if transaction.is_dirty():
transaction.rollback()
transaction.leave_transaction_management()
def process_response(self, request, response):
"""Commits and leaves transaction management."""
if transaction.is_managed():
if transaction.is_dirty():
transaction.commit()
transaction.leave_transaction_management()
return response