Fehler bei Migrationen mit django-konstanz

Question

Vor der Durchführung zu beantworten: Ja, ich habe schon ‚constance.backends.database‘ in meiner INSTALLED_APPS und CONSTANCE_CONFIG gemäß der Standardimplementierung

Ich habe gerade Einrichtung ein vorhandenes Projekt, das hat django- konstanz "https://github.com/jazzband/django-constance"

Wenn ich makemigrations oder wandern, erhalte ich die folgende Ausnahme:

Traceback (most recent call last): 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute 
    return self.cursor.execute(sql, params) 
psycopg2.ProgrammingError: relation "constance_config" does not exist 
LINE 1: ...ce_config"."key", "constance_config"."value" FROM "constance... 
                  ^


The above exception was the direct cause of the following exception: 

Traceback (most recent call last): 
    File "manage.py", line 22, in <module> 
    execute_from_command_line(sys.argv) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line 
    utility.execute() 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/management/__init__.py", line 359, in execute 
    self.fetch_command(subcommand).run_from_argv(self.argv) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/management/base.py", line 294, in run_from_argv 
    self.execute(*args, **cmd_options) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/management/base.py", line 342, in execute 
    self.check() 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/management/base.py", line 374, in check 
    include_deployment_checks=include_deployment_checks, 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/management/base.py", line 361, in _run_checks 
    return checks.run_checks(**kwargs) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/checks/registry.py", line 81, in run_checks 
    new_errors = check(app_configs=app_configs) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/checks/urls.py", line 14, in check_url_config 
    return check_resolver(resolver) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/core/checks/urls.py", line 24, in check_resolver 
    for pattern in resolver.url_patterns: 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__ 
    res = instance.__dict__[self.name] = self.func(instance) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/urls/resolvers.py", line 313, in url_patterns 
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/utils/functional.py", line 35, in __get__ 
    res = instance.__dict__[self.name] = self.func(instance) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/urls/resolvers.py", line 306, in urlconf_module 
    return import_module(self.urlconf_name) 
    File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module 
    return _bootstrap._gcd_import(name[level:], package, level) 
    File "<frozen importlib._bootstrap>", line 986, in _gcd_import 
    File "<frozen importlib._bootstrap>", line 969, in _find_and_load 
    File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked 
    File "<frozen importlib._bootstrap>", line 673, in _load_unlocked 
    File "<frozen importlib._bootstrap_external>", line 665, in exec_module 
    File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed 
    File "/home/saad/PycharmProjects/Sentimeter/sentimeter-backend/backend/urls.py", line 22, in <module> 
    from backend.dashboard import urls as dashboard_urls 
    File "/home/saad/PycharmProjects/Sentimeter/sentimeter-backend/backend/dashboard/urls.py", line 3, in <module> 
    from backend.dashboard.views.benchmark import BenchmarkView 
    File "/home/saad/PycharmProjects/Sentimeter/sentimeter-backend/backend/dashboard/views/benchmark.py", line 9, in <module> 
    from sentimeter.services.dates import DateService 
    File "/home/saad/PycharmProjects/Sentimeter/sentimeter-backend/sentimeter/services/dates.py", line 8, in <module> 
    class DateService: 
    File "/home/saad/PycharmProjects/Sentimeter/sentimeter-backend/sentimeter/services/dates.py", line 19, in DateService 
    def get_dates(days=config.DEFAULT_NO_OF_DAYS, start_date=None, end_date=None): 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/utils/functional.py", line 235, in inner 
    return func(self._wrapped, *args) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/constance/base.py", line 19, in __getattr__ 
    result = self._backend.get(key) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/constance/backends/database/__init__.py", line 71, in get 
    value = self._model._default_manager.get(key=key).value 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/models/manager.py", line 85, in manager_method 
    return getattr(self.get_queryset(), name)(*args, **kwargs) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/models/query.py", line 379, in get 
    num = len(clone) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/models/query.py", line 238, in __len__ 
    self._fetch_all() 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/models/query.py", line 1087, in _fetch_all 
    self._result_cache = list(self.iterator()) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/models/query.py", line 54, in __iter__ 
    results = compiler.execute_sql() 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/models/sql/compiler.py", line 835, in execute_sql 
    cursor.execute(sql, params) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/backends/utils.py", line 79, in execute 
    return super(CursorDebugWrapper, self).execute(sql, params) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute 
    return self.cursor.execute(sql, params) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/utils.py", line 94, in __exit__ 
    six.reraise(dj_exc_type, dj_exc_value, traceback) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise 
    raise value.with_traceback(tb) 
    File "/home/saad/virtualenvs/sentimeter_backend/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute 
    return self.cursor.execute(sql, params) 
django.db.utils.ProgrammingError: relation "constance_config" does not exist 
LINE 1: ...ce_config"."key", "constance_config"."value" FROM "constance... 

                 ^

Answer 1

ich vor dieser Situation hatte.

Dies ist die Schritte, um dies zu beheben.

Ich entferne alle constance config (CONSTANCE_CONFIG) und alle Anrufe mit from constance import config

Die einzige verbleibende verwendete Code konstanz war wie

INSTALLED_APPS = (
    ... 
    'constance', 
    'constance.backends.database', 
    ... 
) 

... 
CONSTANCE_BACKEND = 'constance.backends.database.DatabaseBackend' 
... 

Danach konnte ich die migrate