django via heroku auth_user error - django

Question

I'm trying to deploy my first small django app to heroku. I'm following a tutorial from djangogirls: http://tutorial.djangogirls.org
I'm able to create the app and login as admin on my local computer. When I deploy to heroku and try to login as admin, I get an error saying there is no such table for auth_user:
OperationalError at /admin/login/
no such table: auth_user
Request Method: POST
Request URL: https://intense-river-2803.herokuapp.com/admin/login/?next=/admin/
Django Version: 1.7.5
Exception Type: OperationalError
Exception Value:
no such table: auth_user
Exception Location: /app/.heroku/python/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py in execute, line 485
Python Executable: /app/.heroku/python/bin/python
Python Version: 2.7.9
Python Path:
['/app',
'/app/.heroku/python/bin',
'/app/.heroku/python/lib/python2.7/site-packages/setuptools-11.3.1-py2.7.egg',
'/app/.heroku/python/lib/python2.7/site-packages/pip-6.0.6-py2.7.egg',
'/app',
'/app/.heroku/python/lib/python27.zip',
'/app/.heroku/python/lib/python2.7',
'/app/.heroku/python/lib/python2.7/plat-linux2',
'/app/.heroku/python/lib/python2.7/lib-tk',
'/app/.heroku/python/lib/python2.7/lib-old',
'/app/.heroku/python/lib/python2.7/lib-dynload',
'/app/.heroku/python/lib/python2.7/site-packages']
Server time: Sat, 28 Feb 2015 15:40:42 -0800
I think I'm able to migrate the database ok, but createsuperuser is a problem.
(env) C:\Users\dougw_000\SkyDrive\MyDjangoSite>heroku run python manage.py migra
te
Running `python manage.py migrate` attached to terminal... up, run.4246
Operations to perform:
Apply all migrations: sessions, contenttypes, blog, admin, auth
Running migrations:
Applying contenttypes.0001_initial... OK
Applying auth.0001_initial... OK
Applying admin.0001_initial... OK
Applying blog.0001_initial... OK
Applying sessions.0001_initial... OK
(env) C:\Users\dougw_000\SkyDrive\MyDjangoSite>heroku run python manage.py creat
esuperuser
Running `python manage.py createsuperuser` attached to terminal... up, run.3724
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/_
_init__.py", line 385, in execute_from_command_line
utility.execute()
File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/_
_init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/b
ase.py", line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/app/.heroku/python/lib/python2.7/site-packages/django/contrib/auth/mana
gement/commands/createsuperuser.py", line 55, in execute
return super(Command, self).execute(*args, **options)
File "/app/.heroku/python/lib/python2.7/site-packages/django/core/management/b
ase.py", line 338, in execute
output = self.handle(*args, **options)
File "/app/.heroku/python/lib/python2.7/site-packages/django/contrib/auth/mana
gement/commands/createsuperuser.py", line 88, in handle
default_username = get_default_username()
File "/app/.heroku/python/lib/python2.7/site-packages/django/contrib/auth/mana
gement/__init__.py", line 174, in get_default_username
auth_app.User._default_manager.get(username=default_username)
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/manager
.py", line 92, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/query.p
y", line 351, in get
num = len(clone)
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/query.p
y", line 122, in __len__
self._fetch_all()
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/query.p
y", line 966, in _fetch_all
self._result_cache = list(self.iterator())
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/query.p
y", line 265, in iterator
for row in compiler.results_iter():
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/sql/com
piler.py", line 700, in results_iter
for rows in self.execute_sql(MULTI):
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/models/sql/com
piler.py", line 786, in execute_sql
cursor.execute(sql, params)
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/backends/utils
.py", line 81, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/backends/utils
.py", line 65, in execute
return self.cursor.execute(sql, params)
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/utils.py", lin
e 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/backends/utils
.py", line 65, in execute
return self.cursor.execute(sql, params)
File "/app/.heroku/python/lib/python2.7/site-packages/django/db/backends/sqlit
e3/base.py", line 485, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: auth_user
(env) C:\Users\dougw_000\SkyDrive\MyDjangoSite>

Answer 1

Firstly, find and delete all pyc files locally. Tell your .gitignore file to ignore pyc files in the future and finally push your changes to heroku.
So, to remove the pyc files, in a UNIX like system (linux, OSX), run this command in your terminal inside your djangogirls folder:
find . -name "*.pyc" -exec rm -rf {} \;
Then go to your .gitignore file and add this line:
*.pyc
Then do:
git add -A .
git commit -m "Remove pyc files"
git push heroku master
The tutorial ommits to tell you to add "*.pyc" to your gitignore and this confuses Heroku, a lot.
I had the same issue and this is how I solved it.
Let me know if it worked!