LookupError: App '...' doesn't have a 'SubRegion' model.

[madhav-dhungana]

System check identified 8 issues (0 silenced).
E:\al-bahri\web\project1\bahri\bahri\settings.py changed, reloading.
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\config.py", line 268, in get_model
return self.models[model_name.lower()]
KeyError: 'subregion'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Python38\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Python38\lib\threading.py", line 870, in run
self.target(*self.args, **self.kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management\commands\runserver.py", line
110, in inner_run
autoreload.raise_last_exception()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 87, in raise_last_exception
raise exception[1]
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management_init.py", line 375, in execute
autoreload.check_errors(django.setup)()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django_init.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\registry.py", line 122, in populate
app_config.ready()
File "E:\al-bahri\web\project1\lib\site-packages\django\contrib\admin\apps.py", line 27, in ready
self.module.autodiscover()
File "E:\al-bahri\web\project1\lib\site-packages\django\contrib\admin_init.py", line 24, in autodiscover
autodiscover_modules('admin', register_to=site)
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\module_loading.py", line 47, in autodiscover_modules
import_module('%s.%s' % (app_config.name, module_to_search))
File "C:\Python38\lib\importlib_init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1014, in _gcd_import
File "", line 991, in _find_and_load
File "", line 975, in _find_and_load_unlocked
File "", line 671, in _load_unlocked
File "", line 783, in exec_module
File "", line 219, in _call_with_frames_removed
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\admin.py", line 7, in
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\forms.py", line 5, in
Country, Region, SubRegion, City = get_cities_models()
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 17, in get_cities_models
return [get_cities_model(model_name) for model_name in model_names]
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 17, in
return [get_cities_model(model_name) for model_name in model_names]
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 12, in get_cities_model
return get_model(CITIES_LIGHT_APP_NAME, model_name, *args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\registry.py", line 211, in get_model
return app_config.get_model(model_name, require_ready=require_ready)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\config.py", line 270, in get_model
raise LookupError(
LookupError: App 'ecommerce' doesn't have a 'SubRegion' model.
(project1) PS E:\al-bahri\web\project1\bahri> python manage.py runserver
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\config.py", line 268, in get_model
return self.models[model_name.lower()]
KeyError: 'subregion'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Python38\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Python38\lib\threading.py", line 870, in run
self.target(*self.args, **self.kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management\commands\runserver.py", line
110, in inner_run
autoreload.raise_last_exception()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 87, in raise_last_exception
raise exception[1]
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management_init.py", line 375, in execute
autoreload.check_errors(django.setup)()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django_init.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\registry.py", line 122, in populate
app_config.ready()
File "E:\al-bahri\web\project1\lib\site-packages\django\contrib\admin\apps.py", line 27, in ready
self.module.autodiscover()
File "E:\al-bahri\web\project1\lib\site-packages\django\contrib\admin_init.py", line 24, in autodiscover
autodiscover_modules('admin', register_to=site)
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\module_loading.py", line 47, in autodiscover_modules
import_module('%s.%s' % (app_config.name, module_to_search))
File "C:\Python38\lib\importlib_init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1014, in _gcd_import
File "", line 991, in _find_and_load
File "", line 975, in _find_and_load_unlocked
File "", line 671, in _load_unlocked
File "", line 783, in exec_module
File "", line 219, in _call_with_frames_removed
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\admin.py", line 7, in
from . import forms
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\forms.py", line 5, in
Country, Region, SubRegion, City = get_cities_models()
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 17, in get_cities_models
return [get_cities_model(model_name) for model_name in model_names]
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 17, in
return [get_cities_model(model_name) for model_name in model_names]
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 12, in get_cities_model
return get_model(CITIES_LIGHT_APP_NAME, model_name, *args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\registry.py", line 211, in get_model
return app_config.get_model(model_name, require_ready=require_ready)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\config.py", line 270, in get_model
raise LookupError(
LookupError: App 'ecommerce' doesn't have a 'SubRegion' model.
E:\al-bahri\web\project1\bahri\ecommerce\models.py changed, reloading.
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Python38\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Python38\lib\threading.py", line 870, in run
self._target(*self.args, **self.kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management\commands\runserver.py", line
110, in inner_run
autoreload.raise_last_exception()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 87, in raise_last_exception
raise exception[1]
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management_init.py", line 375, in execute
autoreload.check_errors(django.setup)()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django_init.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\registry.py", line 114, in populate
app_config.import_models()
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\config.py", line 301, in import_models
self.models_module = import_module(models_module_name)
File "C:\Python38\lib\importlib_init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1014, in _gcd_import
File "", line 991, in _find_and_load
File "", line 975, in _find_and_load_unlocked
File "", line 671, in _load_unlocked
File "", line 783, in exec_module
File "", line 219, in _call_with_frames_removed
File "E:\al-bahri\web\project1\bahri\ecommerce\models.py", line 350, in
class SubRegion(AbstractSubRegion):
NameError: name 'AbstractSubRegion' is not defined
E:\al-bahri\web\project1\bahri\ecommerce\models.py changed, reloading.
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Python38\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Python38\lib\threading.py", line 870, in run
self._target(*self.args, **self.kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management\commands\runserver.py", line
110, in inner_run
autoreload.raise_last_exception()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 87, in raise_last_exception
raise exception[1]
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management_init.py", line 375, in execute
autoreload.check_errors(django.setup)()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django_init.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\registry.py", line 114, in populate
app_config.import_models()
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\config.py", line 301, in import_models
self.models_module = import_module(models_module_name)
File "C:\Python38\lib\importlib_init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1014, in _gcd_import
File "", line 991, in _find_and_load
File "", line 975, in _find_and_load_unlocked
File "", line 671, in _load_unlocked
File "", line 783, in exec_module
File "", line 219, in _call_with_frames_removed
File "E:\al-bahri\web\project1\bahri\ecommerce\models.py", line 350, in
class SubRegion(SubRegion):
NameError: name 'SubRegion' is not defined
E:\al-bahri\web\project1\bahri\ecommerce\models.py changed, reloading.
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\config.py", line 268, in get_model
return self.models[model_name.lower()]
KeyError: 'subregion'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Python38\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Python38\lib\threading.py", line 870, in run
self.target(*self.args, **self.kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management\commands\runserver.py", line
110, in inner_run
autoreload.raise_last_exception()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 87, in raise_last_exception
raise exception[1]
File "E:\al-bahri\web\project1\lib\site-packages\django\core\management_init.py", line 375, in execute
autoreload.check_errors(django.setup)()
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django_init.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\registry.py", line 122, in populate
app_config.ready()
File "E:\al-bahri\web\project1\lib\site-packages\django\contrib\admin\apps.py", line 27, in ready
self.module.autodiscover()
File "E:\al-bahri\web\project1\lib\site-packages\django\contrib\admin_init.py", line 24, in autodiscover
autodiscover_modules('admin', register_to=site)
File "E:\al-bahri\web\project1\lib\site-packages\django\utils\module_loading.py", line 47, in autodiscover_modules
import_module('%s.%s' % (app_config.name, module_to_search))
File "C:\Python38\lib\importlib_init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1014, in _gcd_import
File "", line 991, in _find_and_load
File "", line 975, in _find_and_load_unlocked
File "", line 671, in _load_unlocked
File "", line 783, in exec_module
File "", line 219, in _call_with_frames_removed
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\admin.py", line 7, in
from . import forms
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\forms.py", line 5, in
Country, Region, SubRegion, City = get_cities_models()
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 17, in get_cities_models
return [get_cities_model(model_name) for model_name in model_names]
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 17, in
return [get_cities_model(model_name) for model_name in model_names]
File "E:\al-bahri\web\project1\lib\site-packages\cities_light\loading.py", line 12, in get_cities_model
return get_model(CITIES_LIGHT_APP_NAME, model_name, *args, **kwargs)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\registry.py", line 211, in get_model
return app_config.get_model(model_name, require_ready=require_ready)
File "E:\al-bahri\web\project1\lib\site-packages\django\apps\config.py", line 270, in get_model
raise LookupError(
LookupError: App 'ecommerce' doesn't have a 'SubRegion' model.

[ton77v]

I had similar issue, fixed like this. In xx/models:

from cities_light.abstract_models import (AbstractCountry, AbstractRegion,
                                          AbstractCity, AbstractSubRegion)

....            

class SubRegion(AbstractSubRegion):
    pass

connect_default_signals(SubRegion)