您可以使用self.object.user_guid来获取user_guid字段的数据，因此：

class CampaignEditor(UpdateView):
    model = Campaigns
    template_name = 'mailsinfo/add_campaign.html'
    form_class = CampaignsForm

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        data = list(Emails.objects.values()) # you may want to further filter for update purposes
        data = MailsTableWithoutPass(data)
        context['data'] = data
        context['user_guid_field'] = self.object.user_guid
        return context