from functools import cache

from django.apps import apps as django_apps

from django.conf import settings

from django.core.exceptions import ImproperlyConfigured

from django.utils.module_loading import import_string

def get_site_model():

"""

Returns the configured site model or the default site model `feincms3_sites.Site`.

A custom site model can be configured in the settings like so

```

FEINCMS3_SITES_SITE_MODEL = 'myapp.CustomSite'

```

"""

model_name = settings.FEINCMS3_SITES_SITE_MODEL

try:

return django_apps.get_model(model_name, require_ready=False)

except ValueError as exc:

raise ImproperlyConfigured(

"FEINCMS3_SITES_SITE_MODEL must be of the form 'app_label.model_name'"

) from exc

except LookupError as exc:

raise ImproperlyConfigured(

"FEINCMS3_SITES_SITE_MODEL refers to model '%s' that has not been installed"

% model_name

) from exc

@cache

def import_callable(spec):

return spec if callable(spec) else import_string(spec)