django/postgres: Transaction managed block ended with pending COMMIT/ROLLBACK - django

Question

I want to run manage.py sqldiff myapp (command from django extension), but I get the following error:
Traceback (most recent call last):
File "manage.py", line 11, in <module>
execute_manager(settings)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 438, in execute_manager
utility.execute()
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 379, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 191, in run_from_argv
self.execute(*args, **options.__dict__)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 220, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-packages/django_extensions/management/commands/sqldiff.py", line 596, in handle
sqldiff_instance.find_differences()
File "/usr/local/lib/python2.7/dist-packages/django/db/transaction.py", line 222, in inner
self.__exit__(None, None, None)
File "/usr/local/lib/python2.7/dist-packages/django/db/transaction.py", line 207, in __exit__
self.exiting(exc_value, self.using)
File "/usr/local/lib/python2.7/dist-packages/django/db/transaction.py", line 302, in exiting
leave_transaction_management(using=using)
File "/usr/local/lib/python2.7/dist-packages/django/db/transaction.py", line 56, in leave_transaction_management
connection.leave_transaction_management()
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 115, in leave_transaction_management
raise TransactionManagementError("Transaction managed block ended with "
django.db.transaction.TransactionManagementError: Transaction managed block ended with pending COMMIT/ROLLBACK
manage.py runserver, shell, shell_plus all work fine, but the sqldiff command chokes. I have tried:
restart postgres server
manually connect to postgres from shell via psycopg2, ran
connection.rollback(), and connection.commit()
but the error persists.
Any ideas on what can be done are welcome!
Cheers,
Hoff

Answer 1

I updated an issue with sqldiff causing similar problems. Your best bet is probably to obtain django-extensions from the github repository and do a bit of investigation. Edit sqldiff.py and comment out the transaction code decorating the find_differences method:
# #transaction.commit_manually
def find_differences(self):
...
# transaction.rollback() # reset transaction
...
# transaction.commit()
Now your real problem should be revealed, no longer masked by the transaction exception.