Коллеги, добрый день.
Гуглил, но из-за неопытности, не нашел решения проблемы.
Только начал изучать питон, дошел до главы с джанго.
Добавил первую модель "Topic", миграция прошла успешно. Но после добавления новой модели Entry, и попытке миграции, выдает ошибку:
Traceback (most recent call last):
File "manage.py", line 21, in <module>
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line
utility.execute()
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\__init__.py", line 357, in execute
django.setup()
File "D:\!python\learning_log\ll-env\lib\site-packages\django\__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\apps\registry.py", line 114, in populate
app_config.import_models()
File "D:\!python\learning_log\ll-env\lib\site-packages\django\apps\config.py", line 211, in import_models
self.models_module = import_module(models_module_name)
File "C:\Users\Nooqi\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "D:\!python\learning_log\learning_logs\models.py", line 13, in <module>
class Entry(models.Model):
File "D:\!python\learning_log\learning_logs\models.py", line 15, in Entry
topic = models.ForeignKey(Topic)
TypeError: __init__() missing 1 required positional argument: 'on_delete'
Потом решил ребутнуть виртуальную среду:
Watching for file changes with StatReloader
Exception in thread Thread-1:
Traceback (most recent call last):
File "C:\Users\Nooqi\AppData\Local\Programs\Python\Python37\lib\threading.py", line 917, in _bootstrap_inner
self.run()
File "C:\Users\Nooqi\AppData\Local\Programs\Python\Python37\lib\threading.py", line 865, in run
self._target(*self._args, **self._kwargs)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\utils\autoreload.py", line 54, in wrapper
fn(*args, **kwargs)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\commands\runserver.py", line 109, in inner_run
autoreload.raise_last_exception()
File "D:\!python\learning_log\ll-env\lib\site-packages\django\utils\autoreload.py", line 77, in raise_last_exception
raise _exception[0](_exception[1]).with_traceback(_exception[2])
File "D:\!python\learning_log\ll-env\lib\site-packages\django\utils\autoreload.py", line 54, in wrapper
fn(*args, **kwargs)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\apps\registry.py", line 114, in populate
app_config.import_models()
File "D:\!python\learning_log\ll-env\lib\site-packages\django\apps\config.py", line 211, in import_models
self.models_module = import_module(models_module_name)
File "C:\Users\Nooqi\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "D:\!python\learning_log\learning_logs\models.py", line 13, in <module>
class Entry(models.Model):
File "D:\!python\learning_log\learning_logs\models.py", line 15, in Entry
topic = models.ForeignKey(Topic)
TypeError: __init__() missing 1 required positional argument: 'on_delete'
Traceback (most recent call last):
File "D:\!python\learning_log\ll-env\lib\site-packages\django\apps\registry.py", line 155, in get_app_config
return self.app_configs[app_label]
KeyError: 'admin'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 21, in <module>
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line
utility.execute()
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\base.py", line 323, in run_from_argv
self.execute(*args, **cmd_options)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\commands\runserver.py", line 60, in execute
super().execute(*args, **options)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\base.py", line 364, in execute
output = self.handle(*args, **options)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\commands\runserver.py", line 95, in handle
self.run(**options)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\core\management\commands\runserver.py", line 102, in run
autoreload.run_with_reloader(self.inner_run, **options)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\utils\autoreload.py", line 579, in run_with_reloader
start_django(reloader, main_func, *args, **kwargs)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\utils\autoreload.py", line 564, in start_django
reloader.run(django_main_thread)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\utils\autoreload.py", line 272, in run
get_resolver().urlconf_module
File "D:\!python\learning_log\ll-env\lib\site-packages\django\utils\functional.py", line 80, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\urls\resolvers.py", line 564, in urlconf_module
return import_module(self.urlconf_name)
File "C:\Users\Nooqi\AppData\Local\Programs\Python\Python37\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "D:\!python\learning_log\learning_log\urls.py", line 20, in <module>
path('admin/', admin.site.urls),
File "D:\!python\learning_log\ll-env\lib\site-packages\django\utils\functional.py", line 256, in inner
self._setup()
File "D:\!python\learning_log\ll-env\lib\site-packages\django\contrib\admin\sites.py", line 529, in _setup
AdminSiteClass = import_string(apps.get_app_config('admin').default_site)
File "D:\!python\learning_log\ll-env\lib\site-packages\django\apps\registry.py", line 162, in get_app_config
raise LookupError(message)
LookupError: No installed app with label 'admin'.
Погуглил, пишут, что проблема с миграциями из других приложений, если такая модель где-то уже существует. Но вроде ничего нет.
код из models.py
from django.db import models
# Create your models here.
class Topic(models.Model):
"""Тема, которую изучает пользователь"""
text = models.CharField(max_length=200)
date_added = models.DateTimeField(auto_now_add=True)
def __str__(self):
"""Возвращает строковое представление модели."""
return self.text
class Entry(models.Model):
"""Информация, изученная пользователем по теме."""
topic = models.ForeignKey(Topic)
text = models.TextField()
date_added = models.DateTimeField(auto_now_add=True)
class Meta:
verbose_name_plural = 'entries'
def __str__(self):
"""Возращавает строковое представление модели."""
return self.text[:50] + "..."
код из settings.py вырезок с установленными приложениями
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
#Мои приложения
'learning_logs'
]
Если в models.py закомментить модель Entry, то снова все работает нормально.