def __init__(self, *args, **kwargs):
        super(UpcomingMeetingParticipantsForm, self).__init__(*args, **kwargs)
        participants = self.instance.upcoming_meeting_participants.values_list(
                                                                'id', flat=True)
        board_in = []
        board_choices = []
        for b in self.instance.get_board_members():
            board_choices.append((b.id, b.display_name,))
            if b.id in participants:
                board_in.append(b.id)
        self.fields['board'].choices = board_choices 
        self.initial['board'] = board_in
        self.fields['upcoming_meeting_participants'].queryset = self.instance.get_members()
        self.fields['upcoming_meeting_participants'].label = ""