Django: relation "django_site" does not exist in app with psql using sites framework

Question

after switching from sqlite to postgres for local dev db, I am unable to run migrations for my app.

Several fixes and approaches I've attempted have not resolved (ex: Django: relation "django_site" does not exist).

python: 3.6.3

Django Version: 1.11.9

psql (PostgreSQL): 10.1

installed apps:

DJANGO_APPS = (
# Default Django apps:
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.gis',
'django.contrib.humanize',
'django.contrib.admin',
)

THIRD_PARTY_APPS = (
'widget_tweaks',
'mptt',
'channels',
'honeypot',
'gunicorn',
'djangosecure',

# Allauth
'allauth',
'allauth.account',
'allauth.socialaccount',
'allauth.socialaccount.providers.facebook',
)

LOCAL_APPS = (
'users.apps.UsersConfig', #because of a signal
'common',
'geo',
'community',
'objects',
)

INSTALLED_APPS = DJANGO_APPS + THIRD_PARTY_APPS + LOCAL_APPS

in .env file:

SITE_ID=1

solutions I have attempted:

Cleared all migrations and migration files and ran:

$ ./manage.py makemigrations

then I have attempted sequential and manual migrations of apps starting with django.contrib, such as:

$ ./manage.py migrate sites (first)

then applying additional migrations. but regardless of how I order app migrations does not change err or allow migration to complete.

I have also tried migrations with --fake-initial.

it looks like it is calling a site object before creating site model.

project/utils/middleware.py:

class SiteMiddleware(object):
    def process_request(self, request):
        try:
            current_site = Site.objects.get(domain=request.get_host())
        except Site.DoesNotExist:
            current_site = Site.objects.get(id=settings.SITE_ID)

        request.current_site = current_site

        if current_site.domain in settings.HOST_MIDDLEWARE_URLCONF_MAP:
            request.urlconf = settings.HOST_MIDDLEWARE_URLCONF_MAP[str(current_site)]

.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/backends/utils.py:

class CursorWrapper(object):
    def __init__(self, cursor, db):
        self.cursor = cursor
        self.db = db

    WRAP_ERROR_ATTRS = frozenset(['fetchone', 'fetchmany', 'fetchall', 'nextset'])

    def __getattr__(self, attr):
        cursor_attr = getattr(self.cursor, attr)
        if attr in CursorWrapper.WRAP_ERROR_ATTRS:
            return self.db.wrap_database_errors(cursor_attr)
        else:
            return cursor_attr

    def __iter__(self):
        with self.db.wrap_database_errors:
            for item in self.cursor:
                yield item

    def __enter__(self):
        return self

    def __exit__(self, type, value, traceback):
        try:
            self.close()
        except self.db.Database.Error:
            pass

    def callproc(self, procname, params=None):
        self.db.validate_no_broken_transaction()
        with self.db.wrap_database_errors:
            if params is None:
                return self.cursor.callproc(procname)
            else:
                return self.cursor.callproc(procname, params)

    def execute(self, sql, params=None):
        self.db.validate_no_broken_transaction()
        with self.db.wrap_database_errors:
            if params is None:
                return self.cursor.execute(sql)
            else:
                return self.cursor.execute(sql, params)

    def executemany(self, sql, param_list):
        self.db.validate_no_broken_transaction()
        with self.db.wrap_database_errors:
            return self.cursor.executemany(sql, param_list)

migration traceback:

Traceback (most recent call last):
  File "manage.py", line 14, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/core/management/__init__.py", line 364, in execute_from_command_line
    utility.execute()
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/core/management/__init__.py", line 356, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/core/management/base.py", line 283, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/core/management/base.py", line 330, in execute
    output = self.handle(*args, **options)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 227, in handle
    self.verbosity, self.interactive, connection.alias, apps=post_migrate_apps, plan=plan,
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/core/management/sql.py", line 53, in emit_post_migrate_signal
    **kwargs
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/dispatch/dispatcher.py", line 193, in send
    for receiver in self._live_receivers(sender)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/dispatch/dispatcher.py", line 193, in <listcomp>
    for receiver in self._live_receivers(sender)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/contrib/sites/management.py", line 20, in create_default_site
    if not Site.objects.using(using).exists():
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/query.py", line 670, in exists
    return self.query.has_results(using=self.db)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/sql/query.py", line 517, in has_results
    return compiler.has_results()
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 858, in has_results
    return bool(self.execute_sql(SINGLE))
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 899, in execute_sql
    raise original_exception
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 889, in execute_sql
    cursor.execute(sql, params)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/backends/utils.py", line 79, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/backends/utils.py", line 64, in execute
    return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: relation "django_site" does not exist
LINE 1: SELECT (1) AS "a" FROM "django_site" LIMIT 1

./manage.py showmigrations sites:

sites
 [X] 0001_initial
 [X] 0002_alter_domain_unique

admin traceback:

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
64.                 return self.cursor.execute(sql, params)

The above exception (relation "django_site" does not exist
LINE 1: ..."django_site"."domain", "django_site"."name" FROM "django_si...
                                                         ^
) was the direct cause of the following exception:

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
41.             response = get_response(request)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/core/handlers/base.py" in _legacy_get_response
244.             response = middleware_method(request)

File "/Users/.../project/utils/middleware.py" in process_request
47.             current_site = Site.objects.get(domain=request.get_host())

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/manager.py" in manager_method
85.                 return getattr(self.get_queryset(), name)(*args, **kwargs)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/query.py" in get
374.         num = len(clone)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/query.py" in __len__
232.         self._fetch_all()

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/query.py" in _fetch_all
1118.             self._result_cache = list(self._iterable_class(self))

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/query.py" in __iter__
53.         results = compiler.execute_sql(chunked_fetch=self.chunked_fetch)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/sql/compiler.py" in execute_sql
899.             raise original_exception

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/models/sql/compiler.py" in execute_sql
889.             cursor.execute(sql, params)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
79.             return super(CursorDebugWrapper, self).execute(sql, params)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
64.                 return self.cursor.execute(sql, params)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/utils.py" in __exit__
94.                 six.reraise(dj_exc_type, dj_exc_value, traceback)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/utils/six.py" in reraise
685.             raise value.with_traceback(tb)

File "/Users/.pyenv/versions/3.6.3/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
64.                 return self.cursor.execute(sql, params)

Exception Type: ProgrammingError at /admin
Exception Value: relation "django_site" does not exist
LINE 1: ..."django_site"."domain", "django_site"."name" FROM "django_si...
                                                         ^

thanks

Don't abbreviate the traceback like that. We need to know why a middleware is being called as part of the migration process, which it shouldn't be. — Daniel Roseman, Jan 19 '18 at 17:24
In addition to the traceback, please post the class or function containing the line causing the error. — Håken Lid, Jan 19 '18 at 17:28
You've shown the full traceback for going to `/admin` but you haven't shown the full traceback from when you try to migrate. — Alasdair, Jan 19 '18 at 19:47

score 14 · Accepted Answer · answered Jan 24 '18 at 22:57

14

You say that manage.py showmigrations sites shows the following:

sites
[X] 0001_initial
[X] 0002_alter_domain_unique

That means that Django thinks it has already carried out the migrations for the sites app (perhaps this is because you used --fake-initial)

You could use --fake to mark the sites migrations as unapplied, then rerun migrate:

manage.py migrate sites zero --fake
manage.py migrate sites

answered Jan 24 '18 at 22:57

Alasdair

298,606
55
578
516

thanks Alasdair, good thinking. was able to complete migrations using this approach. – Chris B. Jan 26 '18 at 20:26

score 0 · Answer 2 · answered Jan 19 '18 at 17:34

0

If you are able to login to admin and can see group Sites there then please try modifying and saving the site object.

Try organizing the entries in Installed Apps as follows :

'django.contrib.admin',
'django.contrib.auth',
'django.contrib.sites',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',

let me know if this work.

answered Jan 19 '18 at 17:34

Sumeet Kumar

969
1
11
22

cannot access/log into admin due to this issue. organizing apps does not change output. thanks – Chris B. Jan 19 '18 at 18:03

score 0 · Answer 3 · answered Jan 25 '18 at 13:48

This happened to me before, some how the Site model does not exist during migration, all I did is wrap the whole thing in a try catch and the exception does not seem to happened again after the initial Site migration.

class SiteMiddleware(object):
    def process_request(self, request):
        try:
            try:
                current_site = Site.objects.get(domain=request.get_host())
            except Site.DoesNotExist:
                current_site = Site.objects.get(id=settings.SITE_ID)

            request.current_site = current_site

            if current_site.domain in settings.HOST_MIDDLEWARE_URLCONF_MAP:
                request.urlconf = settings.HOST_MIDDLEWARE_URLCONF_MAP[str(current_site)]
        except Exception as ex:
            print('Error: %s' % ex)

Django: relation "django_site" does not exist in app with psql using sites framework

3 Answers3