Migration fails in a with Custom DB Router

[VaZark]

Python version
3.8

Django version
4.1.3

Package version
0.22.1

Current behavior (bug description)
The get_active_theme when invoked in the post_migrate_handler throws an error in a multi-db setup. It does respect the current db defined by the signal migrate.

Expected behavior
Pass the using parameter set in kwargs of post_migrate_handler to get_active_theme to be used with the queryset

Related error : https://code.djangoproject.com/ticket/34165

Minimal example

from threading import local
from django.conf import settings

local_state = local()


class InvalidTenantException(Exception):
    pass


class TenantSubdomainMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        ## Get Subdomain
        host = request.get_host().split(":")[0]
        local_state.subdomain = (
            # We assume single level of subdomain : app.service.com 
            # HOST_IP : used to for local dev. 
            host if host in settings.HOST_IP else host.split(".")[0]
        )
        response = self.get_response(request)
        return response


class TenantDatabaseRouter:
    def _default_db(self):
        subdomain = getattr(local_state, "subdomain", None)
        if subdomain is not None and subdomain in settings.TENANT_MAP:
            db_name = settings.TENANT_MAP[local_state.subdomain]
            return db_name
        else:
            raise InvalidTenantException()

    def db_for_read(self, model, **hints):
        print("read", hints)
        return self._default_db()

    def db_for_write(self, model, **hints):
        print("write", hints)
        return self._default_db()

    def allow_relation(self, obj1, obj2, **hints):
        return None

    def allow_migrate(self, db, app_label, model_name=None, **hints):
        return None

## settings.py

INSTALLED_APPS = [
    "admin_interface",
    ...
]

MIDDLEWARE = [
    "utils.tenant_db_router.TenantSubdomainMiddleware",
    "django.middleware.security.SecurityMiddleware",
    ...
]

TENANT_MAP = {"localhost":"default", "tenant_1":"default"}
DATABASE_ROUTERS = ["utils.tenant_db_router.TenantDatabaseRouter"]

[fabiocaccamo]

@VaZark thank you for reporting this, could you submit a PR containing a failing test and the relative fix?

[fabiocaccamo]

@cristianosavoia probably this issue is related to #170.

[fabiocaccamo]

Fix available by upgrading to 0.22.2 version.