Filter to get dict value by key name

There was a ticket http://code.djangoproject.com/ticket/3371, concerning adding builtin filter to get dict value by key name. Jacob set resolution to wontfix, explaining that this filter would be out of django builtin template engine scope. But what's that scope then? I don't think that "get" fi

order_by(params) after order_by() have no effect

This code looks unclear to me (from django/db/models/sql/query.py) if self.extra_order_by: ordering = self.extra_order_by elif not self.default_ordering: ordering = [] else: ordering = self.order_by or self.model._meta.ordering It means