Some comments to the settings manager

boards/abstracts/settingsmanager.py

@@ -206,8 +206,13 b' class SessionSettingsManager(SettingsMan'
 class DatabaseSettingsManager(SessionSettingsManager):
     def __init__(self, session):
         super().__init__(session)
+
+        # First time a user accesses the server, his session is not saved
+        # and does not have the key yet. In order to create the settings object
+        # we need to save it manually
         if not session.session_key:
             session.save()
+
         self.settings, created = UserSettings.objects.get_or_create(session_key=session.session_key)
 
     def add_fav_tag(self, tag):
@@ -239,8 +244,9 b' class DatabaseSettingsManager(SessionSet'
 
 def get_settings_manager(request) -> SettingsManager:
     """
-    Get settings manager based on the request object. Currently only
-    session-based manager is supported. In the future, cookie-based or
-    database-based managers could be implemented.
+    Get settings manager based on the request object. Currently database-based
+    settings manager is implemented over the session-based one (settings that
+    are not connected to the database in any way are stored in session). Pure
+    session-based manager is also supported but not used by default.
     """
     return DatabaseSettingsManager(request.session)