getListContentForData function added to lists helper. It allows to manually set a list of entities which is to be displayed on the view. Previously, the only function was getListContent, but it retrived data on its own by a single query. The new function can be useful whenever it is impossible or very awkward to obtain entities in such a way (for example more sophisticated SQL statements). Additionally, the getListContent function is reconstructed so that it collects the data first and then calls getListContentForData.

from django.core.management.base import BaseCommand, CommandError

class ArgsCommand(BaseCommand):
    """
    Command class for commands that take multiple arguments.
    """
    args = '<arg arg ...>'

    def handle(self, *args, **options):
        if not args:
            raise CommandError('Must provide the following arguments: %s' % self.args)
        return self.handle_args(*args, **options)

    def handle_args(self, *args, **options):
        raise NotImplementedError()