fix

Main/models/userinfo.py

@@ -7,6 +7,7 @@ from Main.models.settask import SetTask
 from Main.models.subscription import Subscription
 from Main.models.task import Task
 from Sprint.settings import CONSTS
+from SprintLib.language import languages
 
 
 class UserInfo(models.Model):
@@ -21,6 +22,16 @@ class UserInfo(models.Model):
     telegram_chat_id = models.TextField(default="")
     notification_solution_result = models.BooleanField(default=False)
 
+    @property
+    def has_favourite_language(self):
+        return self.favourite_language_id is not None
+
+    @property
+    def favourite_language(self):
+        if not self.has_favourite_language:
+            return None
+        return languages[self.favourite_language_id]
+
     def _append_task(self, task, tasks):
         if task.creator == self.user or task.public or self.user.is_superuser:
             tasks.append(task)

Main/templatetags/filters.py

@@ -1,5 +1,4 @@
 from django import template
 
-from Main.models import SetTask, Subscription
 
 register = template.Library()

Main/views/AccountView.py

@@ -28,7 +28,7 @@ class AccountView(BaseView):
         return "/account"
 
     def post_set_language(self):
-        lang_id = self.request.POST["language"]
+        lang_id = int(self.request.POST["language"])
         self.request.user.userinfo.favourite_language_id = lang_id if lang_id != -1 else None
         self.request.user.userinfo.save()
         return "/account"