Set user language as active language on login.

musician/forms.py

@@ -17,5 +17,6 @@ class LoginForm(AuthenticationForm):
             else:
                 self.username = username
                 self.token = orchestra.auth_token
+                self.user = orchestra.retrieve_profile()
 
         return self.cleaned_data

musician/models.py

@@ -109,14 +109,20 @@ class UserAccount(OrchestraModel):
     @classmethod
     def new_from_json(cls, data, **kwargs):
         billing = None
+        language = None
         last_login = None
 
         if 'billcontact' in data:
             billing = BillingContact.new_from_json(data['billcontact'])
 
+        # Django expects that language code is lowercase
+        if 'language' in data:
+            language = data['language'].lower()
+
         if 'last_login' in data:
             last_login = parse_datetime(data['last_login'])
-        return super().new_from_json(data=data, billing=billing, last_login=last_login)
+
+        return super().new_from_json(data=data, billing=billing, language=language, last_login=last_login)
 
 
 class DatabaseUser(OrchestraModel):

musician/views.py

@@ -1,9 +1,11 @@
 from itertools import groupby
 
+from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
 from django.http import HttpResponse, HttpResponseRedirect
 from django.shortcuts import render
 from django.urls import reverse_lazy
+from django.utils import translation
 from django.utils.http import is_safe_url
 from django.utils.translation import gettext_lazy as _
 from django.views import View
@@ -305,7 +307,15 @@ class LoginView(FormView):
     def form_valid(self, form):
         """Security check complete. Log the user in."""
         auth_login(self.request, form.username, form.token)
-        return HttpResponseRedirect(self.get_success_url())
+
+        # set user language as active language
+        user_language = form.user.language
+        translation.activate(user_language)
+
+        response = HttpResponseRedirect(self.get_success_url())
+        response.set_cookie(settings.LANGUAGE_COOKIE_NAME, user_language)
+
+        return response
 
     def get_success_url(self):
         url = self.get_redirect_url()