Thank you so much for your incredibly thorough response, Emmanuel! That is exactly the kind of insight I was hoping for.
Best,
Shawn
From: django-users@googlegroups.com <django-users@googlegroups.com> on behalf of ASAMOAH EMMANUEL <emmanuelasamoah179@gmail.com>
Date: Monday, April 24, 2023 at 10:22 PM
To: django-users@googlegroups.com <django-users@googlegroups.com>
Subject: Re: Runtime decision on language support
To achieve this, you can create a custom middleware that inherits from `LocaleMiddleware`. In your custom middleware, you can override the `process_request` method to check for the tenant's allowed languages and set the request's language accordingly.
1. Create a new model field for the Tenant model that stores the allowed languages as a list. This can be a JSON field or a ManyToMany field linked to a Language model.
# models.py
from django.contrib.postgres.fields import ArrayField
from django.db import models
class Tenant(models.Model):
...
allowed_languages = ArrayField(models.CharField(max_length=10))
2. Create a custom middleware that inherits from `django.middleware.locale.LocaleMiddleware`:
# custom_middleware.py
from django.middleware.locale import LocaleMiddleware
from django.utils import translation
class CustomLocaleMiddleware(LocaleMiddleware):
def process_request(self, request):
# Get the current tenant
current_tenant = request.tenant
# Get the user's preferred language from the request
language = translation.get_language_from_request(request, check_path=True)
# Check if the preferred language is in the tenant's allowed_languages list
if language not in current_tenant.allowed_languages:
# If not, set the default language for the tenant
language = current_tenant.default_language
# Activate the chosen language
translation.activate(language)
request.LANGUAGE_CODE = translation.get_language()
3. Replace `LocaleMiddleware` with your custom middleware in your `MIDDLEWARE` settings:
# settings.py
MIDDLEWARE = [
...
# 'django.middleware.locale.LocaleMiddleware',
'your_app.custom_middleware.CustomLocaleMiddleware'.
Now, when a user requests a page, the custom middleware checks if the requested language is in the tenant's `allowed_languages` list. If it is not, the tenant's default language will be used. This ensures that the UI and the data are shown in a consistent language.
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