kwargs["initial"] = self.slot.content

        else:

            queryset = queryset.filter(slot=None)

            kwargs["required"] = True

        kwargs["queryset"] = queryset

        return forms.ModelChoiceField(**kwargs)

    def build_content_override_field(self):

        kwargs = {

            "label": "Content",

            "required": False,

            "initial": self.slot.content_override,

        }

        return forms.CharField(**kwargs)

class ScheduleSectionForm(forms.Form):

    required_css_class = 'label-required'

    ROOM_KEY = 'room'

    DATE_KEY = 'date'

    START_KEY = 'time_start'

    END_KEY = 'time_end'